/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-keepdead.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-e5469eb [2021-01-20 18:08:47,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-20 18:08:47,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-20 18:08:48,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-20 18:08:48,020 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-20 18:08:48,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-20 18:08:48,028 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-20 18:08:48,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-20 18:08:48,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-20 18:08:48,048 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-20 18:08:48,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-20 18:08:48,052 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-20 18:08:48,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-20 18:08:48,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-20 18:08:48,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-20 18:08:48,064 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-20 18:08:48,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-20 18:08:48,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-20 18:08:48,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-20 18:08:48,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-20 18:08:48,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-20 18:08:48,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-20 18:08:48,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-20 18:08:48,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-20 18:08:48,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-20 18:08:48,103 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-20 18:08:48,103 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-20 18:08:48,105 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-20 18:08:48,106 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-20 18:08:48,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-20 18:08:48,108 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-20 18:08:48,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-20 18:08:48,110 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-20 18:08:48,111 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-20 18:08:48,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-20 18:08:48,114 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-20 18:08:48,115 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-20 18:08:48,115 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-20 18:08:48,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-20 18:08:48,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-20 18:08:48,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-20 18:08:48,120 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-keepdead.epf [2021-01-20 18:08:48,152 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-20 18:08:48,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-20 18:08:48,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-20 18:08:48,155 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-20 18:08:48,155 INFO L138 SettingsManager]: * Use SBE=true [2021-01-20 18:08:48,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-20 18:08:48,156 INFO L138 SettingsManager]: * sizeof long=4 [2021-01-20 18:08:48,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-20 18:08:48,156 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-01-20 18:08:48,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-20 18:08:48,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-20 18:08:48,157 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-20 18:08:48,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-20 18:08:48,157 INFO L138 SettingsManager]: * sizeof long double=12 [2021-01-20 18:08:48,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-20 18:08:48,158 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-20 18:08:48,158 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-20 18:08:48,158 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-20 18:08:48,159 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-20 18:08:48,159 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-01-20 18:08:48,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-20 18:08:48,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-20 18:08:48,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-20 18:08:48,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-20 18:08:48,160 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-20 18:08:48,160 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-20 18:08:48,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-20 18:08:48,161 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-01-20 18:08:48,161 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-20 18:08:48,161 INFO L138 SettingsManager]: * Remove dead ends from automaton=false [2021-01-20 18:08:48,161 INFO L138 SettingsManager]: * Minimization of abstraction=NONE [2021-01-20 18:08:48,161 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-20 18:08:48,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-20 18:08:48,789 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-20 18:08:48,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-20 18:08:48,795 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-20 18:08:48,797 INFO L275 PluginConnector]: CDTParser initialized [2021-01-20 18:08:48,800 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2021-01-20 18:08:48,916 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07d7e0c5f/04b7b9a6a4a44d9697af3008e393e554/FLAGf42a66373 [2021-01-20 18:08:49,845 INFO L306 CDTParser]: Found 1 translation units. [2021-01-20 18:08:49,846 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i [2021-01-20 18:08:49,883 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07d7e0c5f/04b7b9a6a4a44d9697af3008e393e554/FLAGf42a66373 [2021-01-20 18:08:50,024 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07d7e0c5f/04b7b9a6a4a44d9697af3008e393e554 [2021-01-20 18:08:50,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-20 18:08:50,031 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-01-20 18:08:50,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-20 18:08:50,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-20 18:08:50,039 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-20 18:08:50,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 06:08:50" (1/1) ... [2021-01-20 18:08:50,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e6dfd70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:08:50, skipping insertion in model container [2021-01-20 18:08:50,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 06:08:50" (1/1) ... [2021-01-20 18:08:50,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-20 18:08:50,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-20 18:08:50,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-20 18:08:50,646 INFO L203 MainTranslator]: Completed pre-run [2021-01-20 18:08:50,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-20 18:08:50,938 INFO L208 MainTranslator]: Completed translation [2021-01-20 18:08:50,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:08:50 WrapperNode [2021-01-20 18:08:50,939 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-20 18:08:50,941 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-20 18:08:50,942 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-20 18:08:50,942 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-20 18:08:50,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:08:50" (1/1) ... [2021-01-20 18:08:50,973 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:08:50" (1/1) ... [2021-01-20 18:08:50,999 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-20 18:08:51,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-20 18:08:51,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-20 18:08:51,001 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-20 18:08:51,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:08:50" (1/1) ... [2021-01-20 18:08:51,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:08:50" (1/1) ... [2021-01-20 18:08:51,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:08:50" (1/1) ... [2021-01-20 18:08:51,017 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:08:50" (1/1) ... [2021-01-20 18:08:51,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:08:50" (1/1) ... [2021-01-20 18:08:51,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:08:50" (1/1) ... [2021-01-20 18:08:51,035 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:08:50" (1/1) ... [2021-01-20 18:08:51,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-20 18:08:51,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-20 18:08:51,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-20 18:08:51,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-20 18:08:51,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:08:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-20 18:08:51,149 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-01-20 18:08:51,149 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-01-20 18:08:51,149 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-01-20 18:08:51,149 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-01-20 18:08:51,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-20 18:08:51,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-01-20 18:08:51,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-20 18:08:51,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-20 18:08:51,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-20 18:08:51,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-01-20 18:08:51,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-20 18:08:51,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-20 18:08:51,153 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-01-20 18:08:51,562 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-20 18:08:51,562 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-20 18:08:51,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 06:08:51 BoogieIcfgContainer [2021-01-20 18:08:51,565 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-20 18:08:51,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-20 18:08:51,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-20 18:08:51,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-20 18:08:51,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 06:08:50" (1/3) ... [2021-01-20 18:08:51,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79aedeaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 06:08:51, skipping insertion in model container [2021-01-20 18:08:51,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:08:50" (2/3) ... [2021-01-20 18:08:51,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79aedeaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 06:08:51, skipping insertion in model container [2021-01-20 18:08:51,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 06:08:51" (3/3) ... [2021-01-20 18:08:51,576 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2021-01-20 18:08:51,601 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-01-20 18:08:51,601 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-20 18:08:51,606 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-20 18:08:51,607 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-01-20 18:08:51,655 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,655 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,655 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,655 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,656 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,656 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,656 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,656 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,657 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,657 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,658 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,658 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,662 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,663 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,663 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,664 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,664 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,664 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,665 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,665 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,665 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,665 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,666 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,668 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,669 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,673 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,674 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,674 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,675 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,676 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,676 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,676 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,677 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,677 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,677 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,677 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,677 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,678 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,682 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,682 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,683 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,683 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,683 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,683 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,684 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,687 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,688 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,689 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,691 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,692 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,692 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,692 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,692 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,692 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,693 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,693 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,703 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,703 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,704 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,704 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,704 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,704 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,714 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,714 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,714 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,715 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,715 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,715 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:08:51,718 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-01-20 18:08:51,732 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-20 18:08:51,757 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-20 18:08:51,757 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-20 18:08:51,758 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-20 18:08:51,758 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-20 18:08:51,758 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-20 18:08:51,758 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-20 18:08:51,758 INFO L383 AbstractCegarLoop]: Minimize is NONE [2021-01-20 18:08:51,759 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-20 18:08:51,775 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 64 transitions, 138 flow [2021-01-20 18:08:51,978 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:51,994 INFO L276 IsEmpty]: Start isEmpty. Operand has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:52,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-20 18:08:52,022 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:52,025 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:08:52,025 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:52,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:52,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1900887756, now seen corresponding path program 1 times [2021-01-20 18:08:52,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:52,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870444436] [2021-01-20 18:08:52,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:52,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870444436] [2021-01-20 18:08:52,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 18:08:52,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-20 18:08:52,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449576915] [2021-01-20 18:08:52,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-20 18:08:52,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:52,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-20 18:08:52,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-20 18:08:52,773 INFO L87 Difference]: Start difference. First operand has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:53,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:53,134 INFO L93 Difference]: Finished difference Result 3507 states and 10199 transitions. [2021-01-20 18:08:53,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-20 18:08:53,138 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-01-20 18:08:53,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:53,141 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-01-20 18:08:53,142 INFO L78 Accepts]: Start accepts. Automaton has 3507 states and 10199 transitions. Word has length 28 [2021-01-20 18:08:53,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:53,144 INFO L481 AbstractCegarLoop]: Abstraction has 3507 states and 10199 transitions. [2021-01-20 18:08:53,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:53,145 INFO L276 IsEmpty]: Start isEmpty. Operand 3507 states and 10199 transitions. [2021-01-20 18:08:53,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-20 18:08:53,157 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:53,158 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:08:53,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-20 18:08:53,159 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:53,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:53,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1614586761, now seen corresponding path program 1 times [2021-01-20 18:08:53,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:53,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566001689] [2021-01-20 18:08:53,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:53,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566001689] [2021-01-20 18:08:53,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 18:08:53,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-20 18:08:53,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22147554] [2021-01-20 18:08:53,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-20 18:08:53,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:53,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-20 18:08:53,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-20 18:08:53,440 INFO L87 Difference]: Start difference. First operand 3507 states and 10199 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:53,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:53,684 INFO L93 Difference]: Finished difference Result 3987 states and 11599 transitions. [2021-01-20 18:08:53,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-20 18:08:53,685 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-01-20 18:08:53,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:53,686 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-20 18:08:53,686 INFO L78 Accepts]: Start accepts. Automaton has 3987 states and 11599 transitions. Word has length 32 [2021-01-20 18:08:53,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:53,687 INFO L481 AbstractCegarLoop]: Abstraction has 3987 states and 11599 transitions. [2021-01-20 18:08:53,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:53,688 INFO L276 IsEmpty]: Start isEmpty. Operand 3987 states and 11599 transitions. [2021-01-20 18:08:53,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-20 18:08:53,692 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:53,692 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:08:53,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-20 18:08:53,693 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:53,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:53,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1199752031, now seen corresponding path program 1 times [2021-01-20 18:08:53,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:53,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193316851] [2021-01-20 18:08:53,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:53,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:53,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193316851] [2021-01-20 18:08:53,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 18:08:53,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-20 18:08:53,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612037219] [2021-01-20 18:08:53,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-20 18:08:53,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:53,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-20 18:08:53,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-20 18:08:53,879 INFO L87 Difference]: Start difference. First operand 3987 states and 11599 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:54,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:54,139 INFO L93 Difference]: Finished difference Result 5915 states and 17263 transitions. [2021-01-20 18:08:54,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-20 18:08:54,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-01-20 18:08:54,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:54,142 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-20 18:08:54,142 INFO L78 Accepts]: Start accepts. Automaton has 5915 states and 17263 transitions. Word has length 32 [2021-01-20 18:08:54,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:54,143 INFO L481 AbstractCegarLoop]: Abstraction has 5915 states and 17263 transitions. [2021-01-20 18:08:54,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:54,145 INFO L276 IsEmpty]: Start isEmpty. Operand 5915 states and 17263 transitions. [2021-01-20 18:08:54,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-20 18:08:54,150 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:54,150 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:08:54,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-20 18:08:54,151 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:54,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:54,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1202725261, now seen corresponding path program 2 times [2021-01-20 18:08:54,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:54,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867009170] [2021-01-20 18:08:54,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:54,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867009170] [2021-01-20 18:08:54,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 18:08:54,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-20 18:08:54,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264954242] [2021-01-20 18:08:54,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-20 18:08:54,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:54,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-20 18:08:54,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-20 18:08:54,296 INFO L87 Difference]: Start difference. First operand 5915 states and 17263 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:54,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:54,498 INFO L93 Difference]: Finished difference Result 5915 states and 17199 transitions. [2021-01-20 18:08:54,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-20 18:08:54,499 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-01-20 18:08:54,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:54,500 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-01-20 18:08:54,500 INFO L78 Accepts]: Start accepts. Automaton has 5915 states and 17199 transitions. Word has length 32 [2021-01-20 18:08:54,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:54,501 INFO L481 AbstractCegarLoop]: Abstraction has 5915 states and 17199 transitions. [2021-01-20 18:08:54,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:54,502 INFO L276 IsEmpty]: Start isEmpty. Operand 5915 states and 17199 transitions. [2021-01-20 18:08:54,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-20 18:08:54,512 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:54,512 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:08:54,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-20 18:08:54,513 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:54,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:54,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1299742308, now seen corresponding path program 1 times [2021-01-20 18:08:54,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:54,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412906945] [2021-01-20 18:08:54,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:54,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412906945] [2021-01-20 18:08:54,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 18:08:54,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 18:08:54,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920627280] [2021-01-20 18:08:54,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 18:08:54,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:54,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 18:08:54,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-01-20 18:08:54,648 INFO L87 Difference]: Start difference. First operand 5915 states and 17199 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:54,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:54,943 INFO L93 Difference]: Finished difference Result 9179 states and 26799 transitions. [2021-01-20 18:08:54,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-20 18:08:54,944 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-01-20 18:08:54,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:54,945 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:08:54,946 INFO L78 Accepts]: Start accepts. Automaton has 9179 states and 26799 transitions. Word has length 36 [2021-01-20 18:08:54,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:54,946 INFO L481 AbstractCegarLoop]: Abstraction has 9179 states and 26799 transitions. [2021-01-20 18:08:54,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:54,947 INFO L276 IsEmpty]: Start isEmpty. Operand 9179 states and 26799 transitions. [2021-01-20 18:08:54,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-20 18:08:54,955 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:54,956 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:08:54,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-20 18:08:54,956 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:54,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:54,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1296769078, now seen corresponding path program 2 times [2021-01-20 18:08:54,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:54,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130273134] [2021-01-20 18:08:54,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:55,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130273134] [2021-01-20 18:08:55,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 18:08:55,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 18:08:55,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289394561] [2021-01-20 18:08:55,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 18:08:55,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:55,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 18:08:55,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-01-20 18:08:55,106 INFO L87 Difference]: Start difference. First operand 9179 states and 26799 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:55,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:55,561 INFO L93 Difference]: Finished difference Result 9115 states and 26543 transitions. [2021-01-20 18:08:55,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-20 18:08:55,562 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-01-20 18:08:55,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:55,563 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:08:55,563 INFO L78 Accepts]: Start accepts. Automaton has 9115 states and 26543 transitions. Word has length 36 [2021-01-20 18:08:55,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:55,564 INFO L481 AbstractCegarLoop]: Abstraction has 9115 states and 26543 transitions. [2021-01-20 18:08:55,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:55,565 INFO L276 IsEmpty]: Start isEmpty. Operand 9115 states and 26543 transitions. [2021-01-20 18:08:55,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-20 18:08:55,572 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:55,573 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:08:55,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-20 18:08:55,573 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:55,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:55,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1841087432, now seen corresponding path program 3 times [2021-01-20 18:08:55,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:55,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526257631] [2021-01-20 18:08:55,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:55,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:55,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526257631] [2021-01-20 18:08:55,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 18:08:55,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 18:08:55,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080614654] [2021-01-20 18:08:55,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 18:08:55,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:55,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 18:08:55,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-20 18:08:55,774 INFO L87 Difference]: Start difference. First operand 9115 states and 26543 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:56,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:56,057 INFO L93 Difference]: Finished difference Result 10251 states and 29887 transitions. [2021-01-20 18:08:56,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-20 18:08:56,058 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-01-20 18:08:56,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:56,060 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-01-20 18:08:56,060 INFO L78 Accepts]: Start accepts. Automaton has 10251 states and 29887 transitions. Word has length 36 [2021-01-20 18:08:56,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:56,060 INFO L481 AbstractCegarLoop]: Abstraction has 10251 states and 29887 transitions. [2021-01-20 18:08:56,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:56,061 INFO L276 IsEmpty]: Start isEmpty. Operand 10251 states and 29887 transitions. [2021-01-20 18:08:56,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-20 18:08:56,082 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:56,083 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:08:56,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-20 18:08:56,083 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:56,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:56,084 INFO L82 PathProgramCache]: Analyzing trace with hash -940103400, now seen corresponding path program 1 times [2021-01-20 18:08:56,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:56,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301031624] [2021-01-20 18:08:56,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:56,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:56,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301031624] [2021-01-20 18:08:56,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995093128] [2021-01-20 18:08:56,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:56,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-20 18:08:56,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:56,447 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:56,587 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:56,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:56,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-20 18:08:56,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495267487] [2021-01-20 18:08:56,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-20 18:08:56,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:56,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-20 18:08:56,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-01-20 18:08:56,604 INFO L87 Difference]: Start difference. First operand 10251 states and 29887 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:56,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:56,994 INFO L93 Difference]: Finished difference Result 11083 states and 32319 transitions. [2021-01-20 18:08:56,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-20 18:08:56,995 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-01-20 18:08:56,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:56,998 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:08:56,999 INFO L78 Accepts]: Start accepts. Automaton has 11083 states and 32319 transitions. Word has length 41 [2021-01-20 18:08:56,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:56,999 INFO L481 AbstractCegarLoop]: Abstraction has 11083 states and 32319 transitions. [2021-01-20 18:08:56,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:57,000 INFO L276 IsEmpty]: Start isEmpty. Operand 11083 states and 32319 transitions. [2021-01-20 18:08:57,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-20 18:08:57,020 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:57,020 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:08:57,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-01-20 18:08:57,235 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:57,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:57,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1854918631, now seen corresponding path program 1 times [2021-01-20 18:08:57,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:57,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173558722] [2021-01-20 18:08:57,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:57,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:57,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:57,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173558722] [2021-01-20 18:08:57,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501583141] [2021-01-20 18:08:57,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:57,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-20 18:08:57,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:57,528 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:57,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:57,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-20 18:08:57,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343852976] [2021-01-20 18:08:57,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-20 18:08:57,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:57,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-20 18:08:57,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-01-20 18:08:57,541 INFO L87 Difference]: Start difference. First operand 11083 states and 32319 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:57,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:57,936 INFO L93 Difference]: Finished difference Result 12939 states and 37759 transitions. [2021-01-20 18:08:57,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-20 18:08:57,937 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-01-20 18:08:57,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:57,938 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:08:57,938 INFO L78 Accepts]: Start accepts. Automaton has 12939 states and 37759 transitions. Word has length 41 [2021-01-20 18:08:57,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:57,940 INFO L481 AbstractCegarLoop]: Abstraction has 12939 states and 37759 transitions. [2021-01-20 18:08:57,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:57,941 INFO L276 IsEmpty]: Start isEmpty. Operand 12939 states and 37759 transitions. [2021-01-20 18:08:57,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-20 18:08:57,961 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:57,961 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:08:58,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:58,175 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:58,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:58,176 INFO L82 PathProgramCache]: Analyzing trace with hash 467840107, now seen corresponding path program 2 times [2021-01-20 18:08:58,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:58,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065558246] [2021-01-20 18:08:58,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:58,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:58,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065558246] [2021-01-20 18:08:58,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721431446] [2021-01-20 18:08:58,378 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:58,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:08:58,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:58,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-20 18:08:58,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:58,512 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:08:58,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:58,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:58,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:58,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-01-20 18:08:58,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526826672] [2021-01-20 18:08:58,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-20 18:08:58,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:58,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-20 18:08:58,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-01-20 18:08:58,585 INFO L87 Difference]: Start difference. First operand 12939 states and 37759 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:59,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:59,371 INFO L93 Difference]: Finished difference Result 15179 states and 44287 transitions. [2021-01-20 18:08:59,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-20 18:08:59,371 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-01-20 18:08:59,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:59,373 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-01-20 18:08:59,373 INFO L78 Accepts]: Start accepts. Automaton has 15179 states and 44287 transitions. Word has length 41 [2021-01-20 18:08:59,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:59,374 INFO L481 AbstractCegarLoop]: Abstraction has 15179 states and 44287 transitions. [2021-01-20 18:08:59,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:08:59,374 INFO L276 IsEmpty]: Start isEmpty. Operand 15179 states and 44287 transitions. [2021-01-20 18:08:59,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-20 18:08:59,404 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:59,405 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:08:59,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-20 18:08:59,620 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:59,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:59,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1873860069, now seen corresponding path program 3 times [2021-01-20 18:08:59,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:59,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853378368] [2021-01-20 18:08:59,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:59,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853378368] [2021-01-20 18:08:59,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188134427] [2021-01-20 18:08:59,779 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:59,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-20 18:08:59,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:59,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 18:08:59,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:59,929 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:59,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:59,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-20 18:08:59,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292467385] [2021-01-20 18:08:59,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-20 18:08:59,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:59,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-20 18:08:59,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-01-20 18:08:59,944 INFO L87 Difference]: Start difference. First operand 15179 states and 44287 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:00,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:00,567 INFO L93 Difference]: Finished difference Result 18315 states and 53503 transitions. [2021-01-20 18:09:00,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-20 18:09:00,569 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-01-20 18:09:00,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:00,570 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-01-20 18:09:00,570 INFO L78 Accepts]: Start accepts. Automaton has 18315 states and 53503 transitions. Word has length 41 [2021-01-20 18:09:00,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:00,571 INFO L481 AbstractCegarLoop]: Abstraction has 18315 states and 53503 transitions. [2021-01-20 18:09:00,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:00,571 INFO L276 IsEmpty]: Start isEmpty. Operand 18315 states and 53503 transitions. [2021-01-20 18:09:00,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-20 18:09:00,616 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:00,617 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:00,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:00,826 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:00,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:00,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1870886839, now seen corresponding path program 4 times [2021-01-20 18:09:00,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:00,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106805092] [2021-01-20 18:09:00,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:00,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:01,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:01,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106805092] [2021-01-20 18:09:01,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182744662] [2021-01-20 18:09:01,002 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:01,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:09:01,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:01,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 18:09:01,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:01,182 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:09:01,211 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:01,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:01,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-01-20 18:09:01,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739213470] [2021-01-20 18:09:01,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-20 18:09:01,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:01,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-20 18:09:01,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-01-20 18:09:01,228 INFO L87 Difference]: Start difference. First operand 18315 states and 53503 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:02,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:02,018 INFO L93 Difference]: Finished difference Result 19659 states and 57343 transitions. [2021-01-20 18:09:02,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-20 18:09:02,019 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-01-20 18:09:02,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:02,020 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2021-01-20 18:09:02,020 INFO L78 Accepts]: Start accepts. Automaton has 19659 states and 57343 transitions. Word has length 41 [2021-01-20 18:09:02,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:02,021 INFO L481 AbstractCegarLoop]: Abstraction has 19659 states and 57343 transitions. [2021-01-20 18:09:02,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:02,021 INFO L276 IsEmpty]: Start isEmpty. Operand 19659 states and 57343 transitions. [2021-01-20 18:09:02,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-20 18:09:02,046 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:02,047 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:02,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-20 18:09:02,262 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:02,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:02,263 INFO L82 PathProgramCache]: Analyzing trace with hash 697126713, now seen corresponding path program 1 times [2021-01-20 18:09:02,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:02,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959658310] [2021-01-20 18:09:02,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:02,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:02,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:02,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959658310] [2021-01-20 18:09:02,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80977221] [2021-01-20 18:09:02,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:02,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:02,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 18:09:02,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:02,517 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:02,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:02,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-01-20 18:09:02,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214308110] [2021-01-20 18:09:02,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-20 18:09:02,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:02,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-20 18:09:02,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-01-20 18:09:02,528 INFO L87 Difference]: Start difference. First operand 19659 states and 57343 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:03,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:03,012 INFO L93 Difference]: Finished difference Result 21515 states and 62783 transitions. [2021-01-20 18:09:03,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-20 18:09:03,013 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-01-20 18:09:03,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:03,014 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-01-20 18:09:03,014 INFO L78 Accepts]: Start accepts. Automaton has 21515 states and 62783 transitions. Word has length 46 [2021-01-20 18:09:03,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:03,015 INFO L481 AbstractCegarLoop]: Abstraction has 21515 states and 62783 transitions. [2021-01-20 18:09:03,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:03,015 INFO L276 IsEmpty]: Start isEmpty. Operand 21515 states and 62783 transitions. [2021-01-20 18:09:03,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-20 18:09:03,045 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:03,045 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:03,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:03,259 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:03,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:03,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1275081845, now seen corresponding path program 2 times [2021-01-20 18:09:03,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:03,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212157899] [2021-01-20 18:09:03,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:03,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212157899] [2021-01-20 18:09:03,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306829398] [2021-01-20 18:09:03,416 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:03,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:09:03,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:03,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 18:09:03,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:03,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:09:03,538 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:03,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:03,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-20 18:09:03,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503218286] [2021-01-20 18:09:03,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-20 18:09:03,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:03,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-20 18:09:03,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-01-20 18:09:03,554 INFO L87 Difference]: Start difference. First operand 21515 states and 62783 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:04,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:04,361 INFO L93 Difference]: Finished difference Result 23755 states and 69311 transitions. [2021-01-20 18:09:04,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 18:09:04,361 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-01-20 18:09:04,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:04,363 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-01-20 18:09:04,363 INFO L78 Accepts]: Start accepts. Automaton has 23755 states and 69311 transitions. Word has length 46 [2021-01-20 18:09:04,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:04,363 INFO L481 AbstractCegarLoop]: Abstraction has 23755 states and 69311 transitions. [2021-01-20 18:09:04,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:04,364 INFO L276 IsEmpty]: Start isEmpty. Operand 23755 states and 69311 transitions. [2021-01-20 18:09:04,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-20 18:09:04,391 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:04,391 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:04,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-20 18:09:04,598 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:04,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:04,600 INFO L82 PathProgramCache]: Analyzing trace with hash 130938117, now seen corresponding path program 3 times [2021-01-20 18:09:04,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:04,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954330058] [2021-01-20 18:09:04,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:04,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:04,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954330058] [2021-01-20 18:09:04,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571989798] [2021-01-20 18:09:04,782 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:04,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-20 18:09:04,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:04,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 18:09:04,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:04,896 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:04,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:04,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:04,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-01-20 18:09:04,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072547136] [2021-01-20 18:09:04,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-20 18:09:04,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:04,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-20 18:09:04,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-01-20 18:09:04,906 INFO L87 Difference]: Start difference. First operand 23755 states and 69311 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:05,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:05,547 INFO L93 Difference]: Finished difference Result 26891 states and 78527 transitions. [2021-01-20 18:09:05,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-20 18:09:05,549 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-01-20 18:09:05,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:05,550 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-01-20 18:09:05,551 INFO L78 Accepts]: Start accepts. Automaton has 26891 states and 78527 transitions. Word has length 46 [2021-01-20 18:09:05,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:05,551 INFO L481 AbstractCegarLoop]: Abstraction has 26891 states and 78527 transitions. [2021-01-20 18:09:05,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:05,552 INFO L276 IsEmpty]: Start isEmpty. Operand 26891 states and 78527 transitions. [2021-01-20 18:09:05,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-20 18:09:05,570 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:05,571 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:05,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-20 18:09:05,772 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:05,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:05,773 INFO L82 PathProgramCache]: Analyzing trace with hash 127964887, now seen corresponding path program 4 times [2021-01-20 18:09:05,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:05,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358681751] [2021-01-20 18:09:05,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:05,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:05,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358681751] [2021-01-20 18:09:05,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64550466] [2021-01-20 18:09:05,909 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:05,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:09:05,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:05,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:09:06,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:06,041 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:09:06,062 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:06,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:06,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:06,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-20 18:09:06,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049826728] [2021-01-20 18:09:06,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-20 18:09:06,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:06,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-20 18:09:06,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-01-20 18:09:06,074 INFO L87 Difference]: Start difference. First operand 26891 states and 78527 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:06,584 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-01-20 18:09:06,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:06,882 INFO L93 Difference]: Finished difference Result 26955 states and 78655 transitions. [2021-01-20 18:09:06,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 18:09:06,882 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-01-20 18:09:06,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:06,883 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2021-01-20 18:09:06,883 INFO L78 Accepts]: Start accepts. Automaton has 26955 states and 78655 transitions. Word has length 46 [2021-01-20 18:09:06,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:06,884 INFO L481 AbstractCegarLoop]: Abstraction has 26955 states and 78655 transitions. [2021-01-20 18:09:06,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:06,884 INFO L276 IsEmpty]: Start isEmpty. Operand 26955 states and 78655 transitions. [2021-01-20 18:09:06,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-20 18:09:06,909 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:06,909 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:07,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-20 18:09:07,111 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:07,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:07,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1328082230, now seen corresponding path program 5 times [2021-01-20 18:09:07,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:07,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866776089] [2021-01-20 18:09:07,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:07,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:07,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866776089] [2021-01-20 18:09:07,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238753980] [2021-01-20 18:09:07,317 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 [2021-01-20 18:09:07,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 18:09:07,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:07,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 18:09:07,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:07,457 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:07,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:07,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-20 18:09:07,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854648270] [2021-01-20 18:09:07,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 18:09:07,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:07,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 18:09:07,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-01-20 18:09:07,469 INFO L87 Difference]: Start difference. First operand 26955 states and 78655 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:08,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:08,032 INFO L93 Difference]: Finished difference Result 28939 states and 84479 transitions. [2021-01-20 18:09:08,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-20 18:09:08,032 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-01-20 18:09:08,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:08,033 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2021-01-20 18:09:08,034 INFO L78 Accepts]: Start accepts. Automaton has 28939 states and 84479 transitions. Word has length 51 [2021-01-20 18:09:08,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:08,034 INFO L481 AbstractCegarLoop]: Abstraction has 28939 states and 84479 transitions. [2021-01-20 18:09:08,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:08,034 INFO L276 IsEmpty]: Start isEmpty. Operand 28939 states and 84479 transitions. [2021-01-20 18:09:08,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-20 18:09:08,062 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:08,063 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:08,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-20 18:09:08,277 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:08,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:08,278 INFO L82 PathProgramCache]: Analyzing trace with hash -861941604, now seen corresponding path program 6 times [2021-01-20 18:09:08,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:08,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68743993] [2021-01-20 18:09:08,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:08,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68743993] [2021-01-20 18:09:08,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333110985] [2021-01-20 18:09:08,448 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 [2021-01-20 18:09:08,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 18:09:08,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:08,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 18:09:08,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:08,550 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:09:08,620 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:08,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:08,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:08,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-01-20 18:09:08,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108341762] [2021-01-20 18:09:08,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 18:09:08,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:08,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 18:09:08,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-20 18:09:08,655 INFO L87 Difference]: Start difference. First operand 28939 states and 84479 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:09,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:09,426 INFO L93 Difference]: Finished difference Result 30667 states and 89535 transitions. [2021-01-20 18:09:09,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 18:09:09,426 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-01-20 18:09:09,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:09,427 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2021-01-20 18:09:09,427 INFO L78 Accepts]: Start accepts. Automaton has 30667 states and 89535 transitions. Word has length 51 [2021-01-20 18:09:09,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:09,428 INFO L481 AbstractCegarLoop]: Abstraction has 30667 states and 89535 transitions. [2021-01-20 18:09:09,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:09,428 INFO L276 IsEmpty]: Start isEmpty. Operand 30667 states and 89535 transitions. [2021-01-20 18:09:09,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-20 18:09:09,467 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:09,468 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:09,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-20 18:09:09,682 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:09,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:09,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1106515018, now seen corresponding path program 7 times [2021-01-20 18:09:09,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:09,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687269149] [2021-01-20 18:09:09,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:09,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:09,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687269149] [2021-01-20 18:09:09,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666902555] [2021-01-20 18:09:09,848 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 [2021-01-20 18:09:09,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:09,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 18:09:09,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:09,978 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:09,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:09,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:09,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-20 18:09:09,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894694968] [2021-01-20 18:09:09,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 18:09:09,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:10,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 18:09:10,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-01-20 18:09:10,005 INFO L87 Difference]: Start difference. First operand 30667 states and 89535 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:10,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:10,751 INFO L93 Difference]: Finished difference Result 32395 states and 94591 transitions. [2021-01-20 18:09:10,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-20 18:09:10,752 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-01-20 18:09:10,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:10,752 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2021-01-20 18:09:10,753 INFO L78 Accepts]: Start accepts. Automaton has 32395 states and 94591 transitions. Word has length 51 [2021-01-20 18:09:10,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:10,753 INFO L481 AbstractCegarLoop]: Abstraction has 32395 states and 94591 transitions. [2021-01-20 18:09:10,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:10,753 INFO L276 IsEmpty]: Start isEmpty. Operand 32395 states and 94591 transitions. [2021-01-20 18:09:10,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-20 18:09:10,779 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:10,780 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:10,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:10,986 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:10,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:10,987 INFO L82 PathProgramCache]: Analyzing trace with hash -186912122, now seen corresponding path program 8 times [2021-01-20 18:09:10,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:10,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455526331] [2021-01-20 18:09:10,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:11,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455526331] [2021-01-20 18:09:11,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829502893] [2021-01-20 18:09:11,128 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:11,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:09:11,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:11,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 18:09:11,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:11,225 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:09:11,268 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:11,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:11,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-01-20 18:09:11,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326841148] [2021-01-20 18:09:11,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 18:09:11,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:11,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 18:09:11,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-01-20 18:09:11,286 INFO L87 Difference]: Start difference. First operand 32395 states and 94591 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:11,589 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2021-01-20 18:09:12,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:12,223 INFO L93 Difference]: Finished difference Result 37627 states and 109847 transitions. [2021-01-20 18:09:12,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-20 18:09:12,224 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-01-20 18:09:12,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:12,224 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2021-01-20 18:09:12,225 INFO L78 Accepts]: Start accepts. Automaton has 37627 states and 109847 transitions. Word has length 51 [2021-01-20 18:09:12,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:12,225 INFO L481 AbstractCegarLoop]: Abstraction has 37627 states and 109847 transitions. [2021-01-20 18:09:12,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:12,226 INFO L276 IsEmpty]: Start isEmpty. Operand 37627 states and 109847 transitions. [2021-01-20 18:09:12,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-20 18:09:12,255 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:12,255 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:12,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-01-20 18:09:12,456 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:12,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:12,457 INFO L82 PathProgramCache]: Analyzing trace with hash 165163796, now seen corresponding path program 9 times [2021-01-20 18:09:12,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:12,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679784753] [2021-01-20 18:09:12,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:12,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679784753] [2021-01-20 18:09:12,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108949089] [2021-01-20 18:09:12,583 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 [2021-01-20 18:09:12,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 18:09:12,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:12,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:09:12,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:12,721 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:12,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:12,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:12,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-20 18:09:12,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831050737] [2021-01-20 18:09:12,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 18:09:12,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:12,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 18:09:12,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-01-20 18:09:12,730 INFO L87 Difference]: Start difference. First operand 37627 states and 109847 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:13,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:13,601 INFO L93 Difference]: Finished difference Result 40891 states and 119447 transitions. [2021-01-20 18:09:13,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 18:09:13,602 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-01-20 18:09:13,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:13,603 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2021-01-20 18:09:13,603 INFO L78 Accepts]: Start accepts. Automaton has 40891 states and 119447 transitions. Word has length 51 [2021-01-20 18:09:13,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:13,604 INFO L481 AbstractCegarLoop]: Abstraction has 40891 states and 119447 transitions. [2021-01-20 18:09:13,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:13,604 INFO L276 IsEmpty]: Start isEmpty. Operand 40891 states and 119447 transitions. [2021-01-20 18:09:13,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-20 18:09:13,646 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:13,647 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:13,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:13,863 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:13,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:13,864 INFO L82 PathProgramCache]: Analyzing trace with hash 162190566, now seen corresponding path program 10 times [2021-01-20 18:09:13,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:13,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050833035] [2021-01-20 18:09:13,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:13,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:14,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:14,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050833035] [2021-01-20 18:09:14,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324937264] [2021-01-20 18:09:14,038 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 [2021-01-20 18:09:14,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:09:14,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:14,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:09:14,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:14,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:09:14,360 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:14,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:14,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-20 18:09:14,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856483914] [2021-01-20 18:09:14,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 18:09:14,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:14,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 18:09:14,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-01-20 18:09:14,373 INFO L87 Difference]: Start difference. First operand 40891 states and 119447 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:15,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:15,319 INFO L93 Difference]: Finished difference Result 40955 states and 119575 transitions. [2021-01-20 18:09:15,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-20 18:09:15,320 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-01-20 18:09:15,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:15,321 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=608, Unknown=0, NotChecked=0, Total=870 [2021-01-20 18:09:15,321 INFO L78 Accepts]: Start accepts. Automaton has 40955 states and 119575 transitions. Word has length 51 [2021-01-20 18:09:15,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:15,322 INFO L481 AbstractCegarLoop]: Abstraction has 40955 states and 119575 transitions. [2021-01-20 18:09:15,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:15,322 INFO L276 IsEmpty]: Start isEmpty. Operand 40955 states and 119575 transitions. [2021-01-20 18:09:15,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 18:09:15,565 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:15,565 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:15,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-20 18:09:15,774 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:15,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:15,775 INFO L82 PathProgramCache]: Analyzing trace with hash -688928278, now seen corresponding path program 11 times [2021-01-20 18:09:15,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:15,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430059800] [2021-01-20 18:09:15,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:15,965 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:15,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430059800] [2021-01-20 18:09:15,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265492221] [2021-01-20 18:09:15,966 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 [2021-01-20 18:09:16,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 18:09:16,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:16,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:09:16,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:16,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:16,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:16,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:16,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-01-20 18:09:16,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104753704] [2021-01-20 18:09:16,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 18:09:16,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:16,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 18:09:16,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-01-20 18:09:16,123 INFO L87 Difference]: Start difference. First operand 40955 states and 119575 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:16,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:16,859 INFO L93 Difference]: Finished difference Result 43067 states and 125783 transitions. [2021-01-20 18:09:16,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-20 18:09:16,859 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-01-20 18:09:16,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:16,861 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2021-01-20 18:09:16,861 INFO L78 Accepts]: Start accepts. Automaton has 43067 states and 125783 transitions. Word has length 56 [2021-01-20 18:09:16,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:16,861 INFO L481 AbstractCegarLoop]: Abstraction has 43067 states and 125783 transitions. [2021-01-20 18:09:16,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:16,862 INFO L276 IsEmpty]: Start isEmpty. Operand 43067 states and 125783 transitions. [2021-01-20 18:09:17,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 18:09:17,156 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:17,156 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:17,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:17,371 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:17,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:17,372 INFO L82 PathProgramCache]: Analyzing trace with hash -222787652, now seen corresponding path program 12 times [2021-01-20 18:09:17,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:17,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385307044] [2021-01-20 18:09:17,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:17,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:17,551 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:17,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385307044] [2021-01-20 18:09:17,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830230710] [2021-01-20 18:09:17,553 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:17,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 18:09:17,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:17,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:09:17,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:17,713 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:09:17,739 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:17,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:17,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-20 18:09:17,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267145976] [2021-01-20 18:09:17,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 18:09:17,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:17,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 18:09:17,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-01-20 18:09:17,758 INFO L87 Difference]: Start difference. First operand 43067 states and 125783 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:18,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:18,985 INFO L93 Difference]: Finished difference Result 44795 states and 130839 transitions. [2021-01-20 18:09:18,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 18:09:18,986 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-01-20 18:09:18,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:18,987 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=265, Invalid=665, Unknown=0, NotChecked=0, Total=930 [2021-01-20 18:09:18,987 INFO L78 Accepts]: Start accepts. Automaton has 44795 states and 130839 transitions. Word has length 56 [2021-01-20 18:09:18,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:18,987 INFO L481 AbstractCegarLoop]: Abstraction has 44795 states and 130839 transitions. [2021-01-20 18:09:18,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:18,988 INFO L276 IsEmpty]: Start isEmpty. Operand 44795 states and 130839 transitions. [2021-01-20 18:09:19,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 18:09:19,025 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:19,025 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:19,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-20 18:09:19,226 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:19,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:19,227 INFO L82 PathProgramCache]: Analyzing trace with hash -467361066, now seen corresponding path program 13 times [2021-01-20 18:09:19,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:19,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211504426] [2021-01-20 18:09:19,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:19,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211504426] [2021-01-20 18:09:19,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522477851] [2021-01-20 18:09:19,410 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 [2021-01-20 18:09:19,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:19,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:09:19,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:19,544 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:19,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:19,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-01-20 18:09:19,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143340823] [2021-01-20 18:09:19,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 18:09:19,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:19,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 18:09:19,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-01-20 18:09:19,561 INFO L87 Difference]: Start difference. First operand 44795 states and 130839 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:20,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:20,828 INFO L93 Difference]: Finished difference Result 46523 states and 135895 transitions. [2021-01-20 18:09:20,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-20 18:09:20,829 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-01-20 18:09:20,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:20,830 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=539, Unknown=0, NotChecked=0, Total=756 [2021-01-20 18:09:20,830 INFO L78 Accepts]: Start accepts. Automaton has 46523 states and 135895 transitions. Word has length 56 [2021-01-20 18:09:20,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:20,834 INFO L481 AbstractCegarLoop]: Abstraction has 46523 states and 135895 transitions. [2021-01-20 18:09:20,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:20,835 INFO L276 IsEmpty]: Start isEmpty. Operand 46523 states and 135895 transitions. [2021-01-20 18:09:20,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 18:09:20,910 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:20,911 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:21,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-20 18:09:21,126 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:21,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:21,128 INFO L82 PathProgramCache]: Analyzing trace with hash 452241830, now seen corresponding path program 14 times [2021-01-20 18:09:21,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:21,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424404399] [2021-01-20 18:09:21,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:21,348 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:21,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424404399] [2021-01-20 18:09:21,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877181201] [2021-01-20 18:09:21,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:21,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:09:21,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:21,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:09:21,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:21,484 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:09:21,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:21,532 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:21,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:21,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-20 18:09:21,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832418874] [2021-01-20 18:09:21,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 18:09:21,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:21,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 18:09:21,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-01-20 18:09:21,535 INFO L87 Difference]: Start difference. First operand 46523 states and 135895 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:22,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:22,880 INFO L93 Difference]: Finished difference Result 48635 states and 142039 transitions. [2021-01-20 18:09:22,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 18:09:22,880 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-01-20 18:09:22,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:22,881 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2021-01-20 18:09:22,881 INFO L78 Accepts]: Start accepts. Automaton has 48635 states and 142039 transitions. Word has length 56 [2021-01-20 18:09:22,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:22,882 INFO L481 AbstractCegarLoop]: Abstraction has 48635 states and 142039 transitions. [2021-01-20 18:09:22,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:22,882 INFO L276 IsEmpty]: Start isEmpty. Operand 48635 states and 142039 transitions. [2021-01-20 18:09:22,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 18:09:22,922 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:22,922 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:23,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-20 18:09:23,123 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:23,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:23,124 INFO L82 PathProgramCache]: Analyzing trace with hash 804317748, now seen corresponding path program 15 times [2021-01-20 18:09:23,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:23,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036615736] [2021-01-20 18:09:23,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:23,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:23,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036615736] [2021-01-20 18:09:23,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838421246] [2021-01-20 18:09:23,297 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 [2021-01-20 18:09:23,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 18:09:23,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:23,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:09:23,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:23,406 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:23,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:23,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-01-20 18:09:23,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651173088] [2021-01-20 18:09:23,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 18:09:23,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:23,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 18:09:23,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-01-20 18:09:23,420 INFO L87 Difference]: Start difference. First operand 48635 states and 142039 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:24,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:24,279 INFO L93 Difference]: Finished difference Result 51771 states and 151255 transitions. [2021-01-20 18:09:24,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 18:09:24,280 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-01-20 18:09:24,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:24,281 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2021-01-20 18:09:24,281 INFO L78 Accepts]: Start accepts. Automaton has 51771 states and 151255 transitions. Word has length 56 [2021-01-20 18:09:24,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:24,282 INFO L481 AbstractCegarLoop]: Abstraction has 51771 states and 151255 transitions. [2021-01-20 18:09:24,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:24,282 INFO L276 IsEmpty]: Start isEmpty. Operand 51771 states and 151255 transitions. [2021-01-20 18:09:24,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 18:09:24,325 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:24,325 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:24,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-20 18:09:24,526 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:24,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:24,527 INFO L82 PathProgramCache]: Analyzing trace with hash 801344518, now seen corresponding path program 16 times [2021-01-20 18:09:24,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:24,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306802249] [2021-01-20 18:09:24,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:24,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306802249] [2021-01-20 18:09:24,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563645405] [2021-01-20 18:09:24,977 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 [2021-01-20 18:09:25,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:09:25,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:25,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:09:25,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:25,092 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:09:25,130 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:25,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:25,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-01-20 18:09:25,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883180313] [2021-01-20 18:09:25,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 18:09:25,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:25,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 18:09:25,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-01-20 18:09:25,160 INFO L87 Difference]: Start difference. First operand 51771 states and 151255 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:26,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:26,324 INFO L93 Difference]: Finished difference Result 55227 states and 161239 transitions. [2021-01-20 18:09:26,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 18:09:26,330 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-01-20 18:09:26,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:26,331 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=404, Invalid=1002, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 18:09:26,331 INFO L78 Accepts]: Start accepts. Automaton has 55227 states and 161239 transitions. Word has length 56 [2021-01-20 18:09:26,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:26,332 INFO L481 AbstractCegarLoop]: Abstraction has 55227 states and 161239 transitions. [2021-01-20 18:09:26,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:26,332 INFO L276 IsEmpty]: Start isEmpty. Operand 55227 states and 161239 transitions. [2021-01-20 18:09:26,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:09:26,732 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:26,740 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:26,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-20 18:09:26,955 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:26,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:26,955 INFO L82 PathProgramCache]: Analyzing trace with hash 548080699, now seen corresponding path program 17 times [2021-01-20 18:09:26,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:26,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392992420] [2021-01-20 18:09:26,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:27,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392992420] [2021-01-20 18:09:27,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121423287] [2021-01-20 18:09:27,167 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 [2021-01-20 18:09:27,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 18:09:27,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:27,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:09:27,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:27,264 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:27,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:27,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-01-20 18:09:27,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596228556] [2021-01-20 18:09:27,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 18:09:27,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:27,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 18:09:27,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-01-20 18:09:27,276 INFO L87 Difference]: Start difference. First operand 55227 states and 161239 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:27,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:27,940 INFO L93 Difference]: Finished difference Result 57339 states and 167447 transitions. [2021-01-20 18:09:27,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 18:09:27,941 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-20 18:09:27,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:27,942 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=525, Unknown=0, NotChecked=0, Total=756 [2021-01-20 18:09:27,943 INFO L78 Accepts]: Start accepts. Automaton has 57339 states and 167447 transitions. Word has length 61 [2021-01-20 18:09:27,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:27,943 INFO L481 AbstractCegarLoop]: Abstraction has 57339 states and 167447 transitions. [2021-01-20 18:09:27,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:27,944 INFO L276 IsEmpty]: Start isEmpty. Operand 57339 states and 167447 transitions. [2021-01-20 18:09:27,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:09:28,000 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:28,000 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:28,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:28,204 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:28,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:28,205 INFO L82 PathProgramCache]: Analyzing trace with hash 503720845, now seen corresponding path program 18 times [2021-01-20 18:09:28,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:28,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925290390] [2021-01-20 18:09:28,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:28,665 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:28,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925290390] [2021-01-20 18:09:28,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671814807] [2021-01-20 18:09:28,667 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 [2021-01-20 18:09:28,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 18:09:28,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:28,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:09:28,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:28,818 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:09:28,840 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:28,862 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:28,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:28,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-20 18:09:28,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413592138] [2021-01-20 18:09:28,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 18:09:28,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:28,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 18:09:28,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-01-20 18:09:28,868 INFO L87 Difference]: Start difference. First operand 57339 states and 167447 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:29,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:29,837 INFO L93 Difference]: Finished difference Result 59195 states and 172887 transitions. [2021-01-20 18:09:29,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 18:09:29,838 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-20 18:09:29,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:29,839 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2021-01-20 18:09:29,839 INFO L78 Accepts]: Start accepts. Automaton has 59195 states and 172887 transitions. Word has length 61 [2021-01-20 18:09:29,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:29,840 INFO L481 AbstractCegarLoop]: Abstraction has 59195 states and 172887 transitions. [2021-01-20 18:09:29,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:29,840 INFO L276 IsEmpty]: Start isEmpty. Operand 59195 states and 172887 transitions. [2021-01-20 18:09:29,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:09:29,905 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:29,905 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:30,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:30,111 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:30,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:30,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1988537895, now seen corresponding path program 19 times [2021-01-20 18:09:30,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:30,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248993398] [2021-01-20 18:09:30,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:30,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248993398] [2021-01-20 18:09:30,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272468084] [2021-01-20 18:09:30,337 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 [2021-01-20 18:09:30,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:30,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:09:30,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:30,461 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:30,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:30,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-01-20 18:09:30,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386558804] [2021-01-20 18:09:30,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 18:09:30,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:30,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 18:09:30,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-01-20 18:09:30,478 INFO L87 Difference]: Start difference. First operand 59195 states and 172887 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:31,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:31,675 INFO L93 Difference]: Finished difference Result 61051 states and 178327 transitions. [2021-01-20 18:09:31,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-20 18:09:31,675 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-20 18:09:31,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:31,676 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=267, Invalid=725, Unknown=0, NotChecked=0, Total=992 [2021-01-20 18:09:31,676 INFO L78 Accepts]: Start accepts. Automaton has 61051 states and 178327 transitions. Word has length 61 [2021-01-20 18:09:31,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:31,677 INFO L481 AbstractCegarLoop]: Abstraction has 61051 states and 178327 transitions. [2021-01-20 18:09:31,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:31,677 INFO L276 IsEmpty]: Start isEmpty. Operand 61051 states and 178327 transitions. [2021-01-20 18:09:31,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:09:31,732 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:31,732 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:31,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:31,939 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:31,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:31,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1084722953, now seen corresponding path program 20 times [2021-01-20 18:09:31,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:31,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369849162] [2021-01-20 18:09:31,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:31,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:32,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369849162] [2021-01-20 18:09:32,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988744542] [2021-01-20 18:09:32,118 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:32,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:09:32,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:32,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:09:32,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:32,237 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:09:32,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:32,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:32,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-20 18:09:32,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678816126] [2021-01-20 18:09:32,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 18:09:32,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:32,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 18:09:32,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-01-20 18:09:32,270 INFO L87 Difference]: Start difference. First operand 61051 states and 178327 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:33,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:33,621 INFO L93 Difference]: Finished difference Result 64379 states and 188055 transitions. [2021-01-20 18:09:33,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-20 18:09:33,622 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-20 18:09:33,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:33,623 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2021-01-20 18:09:33,623 INFO L78 Accepts]: Start accepts. Automaton has 64379 states and 188055 transitions. Word has length 61 [2021-01-20 18:09:33,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:33,623 INFO L481 AbstractCegarLoop]: Abstraction has 64379 states and 188055 transitions. [2021-01-20 18:09:33,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:33,624 INFO L276 IsEmpty]: Start isEmpty. Operand 64379 states and 188055 transitions. [2021-01-20 18:09:33,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:09:33,674 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:33,674 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:33,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-20 18:09:33,875 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:33,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:33,876 INFO L82 PathProgramCache]: Analyzing trace with hash 2120210981, now seen corresponding path program 21 times [2021-01-20 18:09:33,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:33,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516984457] [2021-01-20 18:09:33,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:34,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516984457] [2021-01-20 18:09:34,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001292705] [2021-01-20 18:09:34,044 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:34,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 18:09:34,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:34,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:09:34,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:34,154 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:34,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:34,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-01-20 18:09:34,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644412471] [2021-01-20 18:09:34,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 18:09:34,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:34,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 18:09:34,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-01-20 18:09:34,165 INFO L87 Difference]: Start difference. First operand 64379 states and 188055 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:35,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:35,104 INFO L93 Difference]: Finished difference Result 66235 states and 193495 transitions. [2021-01-20 18:09:35,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 18:09:35,104 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-20 18:09:35,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:35,106 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=342, Invalid=848, Unknown=0, NotChecked=0, Total=1190 [2021-01-20 18:09:35,106 INFO L78 Accepts]: Start accepts. Automaton has 66235 states and 193495 transitions. Word has length 61 [2021-01-20 18:09:35,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:35,106 INFO L481 AbstractCegarLoop]: Abstraction has 66235 states and 193495 transitions. [2021-01-20 18:09:35,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:35,107 INFO L276 IsEmpty]: Start isEmpty. Operand 66235 states and 193495 transitions. [2021-01-20 18:09:35,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:09:35,168 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:35,168 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:35,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:35,369 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:35,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:35,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1255153419, now seen corresponding path program 22 times [2021-01-20 18:09:35,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:35,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077580273] [2021-01-20 18:09:35,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:35,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077580273] [2021-01-20 18:09:35,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246004827] [2021-01-20 18:09:35,920 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:36,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:09:36,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:36,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:09:36,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:36,040 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:09:36,057 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:36,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:36,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-20 18:09:36,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987350789] [2021-01-20 18:09:36,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 18:09:36,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:36,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 18:09:36,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-01-20 18:09:36,069 INFO L87 Difference]: Start difference. First operand 66235 states and 193495 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:37,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:37,225 INFO L93 Difference]: Finished difference Result 68475 states and 200023 transitions. [2021-01-20 18:09:37,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 18:09:37,226 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-20 18:09:37,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:37,227 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=372, Invalid=960, Unknown=0, NotChecked=0, Total=1332 [2021-01-20 18:09:37,227 INFO L78 Accepts]: Start accepts. Automaton has 68475 states and 200023 transitions. Word has length 61 [2021-01-20 18:09:37,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:37,227 INFO L481 AbstractCegarLoop]: Abstraction has 68475 states and 200023 transitions. [2021-01-20 18:09:37,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:37,228 INFO L276 IsEmpty]: Start isEmpty. Operand 68475 states and 200023 transitions. [2021-01-20 18:09:37,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:09:37,290 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:37,290 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:37,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-20 18:09:37,491 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:37,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:37,492 INFO L82 PathProgramCache]: Analyzing trace with hash -903077501, now seen corresponding path program 23 times [2021-01-20 18:09:37,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:37,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259042665] [2021-01-20 18:09:37,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:37,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:37,658 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:37,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259042665] [2021-01-20 18:09:37,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798891753] [2021-01-20 18:09:37,659 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:37,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 18:09:37,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:37,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:09:37,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:37,763 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:37,771 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:37,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:37,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-01-20 18:09:37,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901243790] [2021-01-20 18:09:37,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 18:09:37,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:37,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 18:09:37,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-01-20 18:09:37,773 INFO L87 Difference]: Start difference. First operand 68475 states and 200023 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:38,107 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2021-01-20 18:09:39,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:39,202 INFO L93 Difference]: Finished difference Result 71739 states and 209623 transitions. [2021-01-20 18:09:39,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 18:09:39,203 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-20 18:09:39,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:39,204 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=926, Unknown=0, NotChecked=0, Total=1332 [2021-01-20 18:09:39,204 INFO L78 Accepts]: Start accepts. Automaton has 71739 states and 209623 transitions. Word has length 61 [2021-01-20 18:09:39,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:39,205 INFO L481 AbstractCegarLoop]: Abstraction has 71739 states and 209623 transitions. [2021-01-20 18:09:39,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:39,205 INFO L276 IsEmpty]: Start isEmpty. Operand 71739 states and 209623 transitions. [2021-01-20 18:09:39,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:09:39,283 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:39,283 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:39,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:39,484 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:39,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:39,485 INFO L82 PathProgramCache]: Analyzing trace with hash -906050731, now seen corresponding path program 24 times [2021-01-20 18:09:39,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:39,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089411772] [2021-01-20 18:09:39,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:39,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089411772] [2021-01-20 18:09:39,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419985139] [2021-01-20 18:09:39,728 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:39,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 18:09:39,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:39,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:09:39,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:39,888 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:39,897 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:39,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:39,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-01-20 18:09:39,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684254316] [2021-01-20 18:09:39,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:09:39,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:39,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:09:39,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:09:39,900 INFO L87 Difference]: Start difference. First operand 71739 states and 209623 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:41,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:41,627 INFO L93 Difference]: Finished difference Result 75451 states and 220375 transitions. [2021-01-20 18:09:41,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-20 18:09:41,628 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-20 18:09:41,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:41,629 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=466, Invalid=1256, Unknown=0, NotChecked=0, Total=1722 [2021-01-20 18:09:41,629 INFO L78 Accepts]: Start accepts. Automaton has 75451 states and 220375 transitions. Word has length 61 [2021-01-20 18:09:41,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:41,630 INFO L481 AbstractCegarLoop]: Abstraction has 75451 states and 220375 transitions. [2021-01-20 18:09:41,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:41,630 INFO L276 IsEmpty]: Start isEmpty. Operand 75451 states and 220375 transitions. [2021-01-20 18:09:41,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:09:41,711 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:41,711 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:41,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-20 18:09:41,912 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:41,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:41,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1591649445, now seen corresponding path program 25 times [2021-01-20 18:09:41,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:41,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661878401] [2021-01-20 18:09:41,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:41,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:42,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661878401] [2021-01-20 18:09:42,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759460096] [2021-01-20 18:09:42,131 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:42,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:09:42,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:42,258 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:42,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:42,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-20 18:09:42,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742419419] [2021-01-20 18:09:42,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:09:42,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:42,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:09:42,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:09:42,273 INFO L87 Difference]: Start difference. First operand 75451 states and 220375 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:43,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:43,566 INFO L93 Difference]: Finished difference Result 77819 states and 227351 transitions. [2021-01-20 18:09:43,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-20 18:09:43,567 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-20 18:09:43,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:43,568 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=745, Unknown=0, NotChecked=0, Total=1056 [2021-01-20 18:09:43,568 INFO L78 Accepts]: Start accepts. Automaton has 77819 states and 227351 transitions. Word has length 66 [2021-01-20 18:09:43,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:43,568 INFO L481 AbstractCegarLoop]: Abstraction has 77819 states and 227351 transitions. [2021-01-20 18:09:43,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:43,569 INFO L276 IsEmpty]: Start isEmpty. Operand 77819 states and 227351 transitions. [2021-01-20 18:09:43,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:09:43,655 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:43,655 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:43,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:43,870 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:43,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:43,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1636009299, now seen corresponding path program 26 times [2021-01-20 18:09:43,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:43,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354159823] [2021-01-20 18:09:43,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:44,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354159823] [2021-01-20 18:09:44,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619525788] [2021-01-20 18:09:44,114 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 [2021-01-20 18:09:44,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:09:44,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:44,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:09:44,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:44,243 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:09:44,288 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:44,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:44,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-01-20 18:09:44,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100659663] [2021-01-20 18:09:44,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:09:44,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:44,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:09:44,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:09:44,306 INFO L87 Difference]: Start difference. First operand 77819 states and 227351 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:45,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:45,397 INFO L93 Difference]: Finished difference Result 79675 states and 232791 transitions. [2021-01-20 18:09:45,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 18:09:45,398 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-20 18:09:45,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:45,399 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=400, Invalid=1006, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 18:09:45,399 INFO L78 Accepts]: Start accepts. Automaton has 79675 states and 232791 transitions. Word has length 66 [2021-01-20 18:09:45,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:45,400 INFO L481 AbstractCegarLoop]: Abstraction has 79675 states and 232791 transitions. [2021-01-20 18:09:45,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:45,400 INFO L276 IsEmpty]: Start isEmpty. Operand 79675 states and 232791 transitions. [2021-01-20 18:09:45,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:09:45,483 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:45,483 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:45,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-20 18:09:45,684 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:45,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:45,685 INFO L82 PathProgramCache]: Analyzing trace with hash -151192249, now seen corresponding path program 27 times [2021-01-20 18:09:45,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:45,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951987596] [2021-01-20 18:09:45,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:46,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951987596] [2021-01-20 18:09:46,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416442751] [2021-01-20 18:09:46,333 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 [2021-01-20 18:09:46,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-20 18:09:46,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:46,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-20 18:09:46,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:46,457 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:46,466 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:46,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:46,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-20 18:09:46,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899714347] [2021-01-20 18:09:46,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:09:46,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:46,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:09:46,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:09:46,469 INFO L87 Difference]: Start difference. First operand 79675 states and 232791 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:47,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:47,411 INFO L93 Difference]: Finished difference Result 81531 states and 238231 transitions. [2021-01-20 18:09:47,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 18:09:47,412 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-20 18:09:47,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:47,413 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2021-01-20 18:09:47,413 INFO L78 Accepts]: Start accepts. Automaton has 81531 states and 238231 transitions. Word has length 66 [2021-01-20 18:09:47,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:47,414 INFO L481 AbstractCegarLoop]: Abstraction has 81531 states and 238231 transitions. [2021-01-20 18:09:47,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:47,414 INFO L276 IsEmpty]: Start isEmpty. Operand 81531 states and 238231 transitions. [2021-01-20 18:09:47,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:09:47,491 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:47,491 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:47,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-20 18:09:47,697 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:47,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:47,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1070514199, now seen corresponding path program 28 times [2021-01-20 18:09:47,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:47,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672275379] [2021-01-20 18:09:47,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:47,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672275379] [2021-01-20 18:09:47,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538389597] [2021-01-20 18:09:47,894 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 [2021-01-20 18:09:47,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:09:47,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:47,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:09:47,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:48,000 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:09:48,048 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:48,062 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:48,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:48,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-01-20 18:09:48,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457132732] [2021-01-20 18:09:48,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:09:48,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:48,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:09:48,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:09:48,064 INFO L87 Difference]: Start difference. First operand 81531 states and 238231 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:48,741 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 13 [2021-01-20 18:09:49,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:49,795 INFO L93 Difference]: Finished difference Result 83259 states and 243287 transitions. [2021-01-20 18:09:49,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 18:09:49,795 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-20 18:09:49,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:49,796 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=432, Invalid=1128, Unknown=0, NotChecked=0, Total=1560 [2021-01-20 18:09:49,797 INFO L78 Accepts]: Start accepts. Automaton has 83259 states and 243287 transitions. Word has length 66 [2021-01-20 18:09:49,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:49,797 INFO L481 AbstractCegarLoop]: Abstraction has 83259 states and 243287 transitions. [2021-01-20 18:09:49,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:49,797 INFO L276 IsEmpty]: Start isEmpty. Operand 83259 states and 243287 transitions. [2021-01-20 18:09:49,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:09:49,895 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:49,895 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:50,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-20 18:09:50,103 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:50,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:50,104 INFO L82 PathProgramCache]: Analyzing trace with hash -19519163, now seen corresponding path program 29 times [2021-01-20 18:09:50,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:50,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472961818] [2021-01-20 18:09:50,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:50,310 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:50,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472961818] [2021-01-20 18:09:50,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200138374] [2021-01-20 18:09:50,311 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 [2021-01-20 18:09:50,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-20 18:09:50,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:50,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:09:50,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:50,453 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:50,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:50,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-20 18:09:50,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178494562] [2021-01-20 18:09:50,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:09:50,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:50,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:09:50,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:09:50,467 INFO L87 Difference]: Start difference. First operand 83259 states and 243287 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:52,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:52,058 INFO L93 Difference]: Finished difference Result 85115 states and 248727 transitions. [2021-01-20 18:09:52,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 18:09:52,059 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-20 18:09:52,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:52,060 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=379, Invalid=953, Unknown=0, NotChecked=0, Total=1332 [2021-01-20 18:09:52,060 INFO L78 Accepts]: Start accepts. Automaton has 85115 states and 248727 transitions. Word has length 66 [2021-01-20 18:09:52,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:52,060 INFO L481 AbstractCegarLoop]: Abstraction has 85115 states and 248727 transitions. [2021-01-20 18:09:52,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:52,061 INFO L276 IsEmpty]: Start isEmpty. Operand 85115 states and 248727 transitions. [2021-01-20 18:09:52,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:09:52,141 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:52,141 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:52,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-01-20 18:09:52,355 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:52,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:52,356 INFO L82 PathProgramCache]: Analyzing trace with hash 900083733, now seen corresponding path program 30 times [2021-01-20 18:09:52,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:52,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018810766] [2021-01-20 18:09:52,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:52,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:52,543 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:52,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018810766] [2021-01-20 18:09:52,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383468860] [2021-01-20 18:09:52,543 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 [2021-01-20 18:09:52,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-20 18:09:52,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:52,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:09:52,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:52,711 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:52,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:52,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-01-20 18:09:52,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855096820] [2021-01-20 18:09:52,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:09:52,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:52,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:09:52,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:09:52,727 INFO L87 Difference]: Start difference. First operand 85115 states and 248727 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:54,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:54,183 INFO L93 Difference]: Finished difference Result 87995 states and 257111 transitions. [2021-01-20 18:09:54,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 18:09:54,184 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-20 18:09:54,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:54,185 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=393, Invalid=1089, Unknown=0, NotChecked=0, Total=1482 [2021-01-20 18:09:54,186 INFO L78 Accepts]: Start accepts. Automaton has 87995 states and 257111 transitions. Word has length 66 [2021-01-20 18:09:54,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:54,186 INFO L481 AbstractCegarLoop]: Abstraction has 87995 states and 257111 transitions. [2021-01-20 18:09:54,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:54,186 INFO L276 IsEmpty]: Start isEmpty. Operand 87995 states and 257111 transitions. [2021-01-20 18:09:54,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:09:54,779 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:54,780 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:54,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:54,994 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:54,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:54,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1252159651, now seen corresponding path program 31 times [2021-01-20 18:09:54,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:54,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971427090] [2021-01-20 18:09:54,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:55,177 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:55,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971427090] [2021-01-20 18:09:55,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007321436] [2021-01-20 18:09:55,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:55,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:09:55,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:55,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:55,308 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:55,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:55,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-20 18:09:55,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467538424] [2021-01-20 18:09:55,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:09:55,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:55,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:09:55,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:09:55,311 INFO L87 Difference]: Start difference. First operand 87995 states and 257111 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:56,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:56,497 INFO L93 Difference]: Finished difference Result 91259 states and 266711 transitions. [2021-01-20 18:09:56,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 18:09:56,498 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-20 18:09:56,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:56,499 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=443, Invalid=1039, Unknown=0, NotChecked=0, Total=1482 [2021-01-20 18:09:56,499 INFO L78 Accepts]: Start accepts. Automaton has 91259 states and 266711 transitions. Word has length 66 [2021-01-20 18:09:56,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:56,500 INFO L481 AbstractCegarLoop]: Abstraction has 91259 states and 266711 transitions. [2021-01-20 18:09:56,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:56,500 INFO L276 IsEmpty]: Start isEmpty. Operand 91259 states and 266711 transitions. [2021-01-20 18:09:56,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:09:56,585 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:56,585 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:56,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-20 18:09:56,799 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:56,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:56,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1249186421, now seen corresponding path program 32 times [2021-01-20 18:09:56,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:56,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084914114] [2021-01-20 18:09:56,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:56,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:56,967 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:56,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084914114] [2021-01-20 18:09:56,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653175532] [2021-01-20 18:09:56,968 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 [2021-01-20 18:09:57,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:09:57,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:57,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:09:57,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:57,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:57,113 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:57,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:57,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-20 18:09:57,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095720167] [2021-01-20 18:09:57,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:09:57,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:57,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:09:57,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:09:57,116 INFO L87 Difference]: Start difference. First operand 91259 states and 266711 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:57,598 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2021-01-20 18:09:58,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:58,869 INFO L93 Difference]: Finished difference Result 91323 states and 266839 transitions. [2021-01-20 18:09:58,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 18:09:58,870 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-20 18:09:58,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:58,871 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=405, Invalid=1077, Unknown=0, NotChecked=0, Total=1482 [2021-01-20 18:09:58,871 INFO L78 Accepts]: Start accepts. Automaton has 91323 states and 266839 transitions. Word has length 66 [2021-01-20 18:09:58,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:58,871 INFO L481 AbstractCegarLoop]: Abstraction has 91323 states and 266839 transitions. [2021-01-20 18:09:58,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:09:58,871 INFO L276 IsEmpty]: Start isEmpty. Operand 91323 states and 266839 transitions. [2021-01-20 18:09:58,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:09:58,973 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:58,973 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:09:59,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-01-20 18:09:59,174 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:59,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:59,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1334750316, now seen corresponding path program 33 times [2021-01-20 18:09:59,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:59,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444749262] [2021-01-20 18:09:59,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:59,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:59,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444749262] [2021-01-20 18:09:59,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428239934] [2021-01-20 18:09:59,417 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 [2021-01-20 18:09:59,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-20 18:09:59,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:59,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:09:59,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:59,546 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:09:59,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:59,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-20 18:09:59,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768670184] [2021-01-20 18:09:59,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:09:59,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:59,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:09:59,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:09:59,569 INFO L87 Difference]: Start difference. First operand 91323 states and 266839 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:01,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:01,040 INFO L93 Difference]: Finished difference Result 93563 states and 273431 transitions. [2021-01-20 18:10:01,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 18:10:01,040 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-20 18:10:01,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:01,041 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2021-01-20 18:10:01,041 INFO L78 Accepts]: Start accepts. Automaton has 93563 states and 273431 transitions. Word has length 71 [2021-01-20 18:10:01,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:01,042 INFO L481 AbstractCegarLoop]: Abstraction has 93563 states and 273431 transitions. [2021-01-20 18:10:01,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:01,042 INFO L276 IsEmpty]: Start isEmpty. Operand 93563 states and 273431 transitions. [2021-01-20 18:10:01,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:10:01,160 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:01,160 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:10:01,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:01,361 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:01,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:01,362 INFO L82 PathProgramCache]: Analyzing trace with hash -99594946, now seen corresponding path program 34 times [2021-01-20 18:10:01,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:01,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094150754] [2021-01-20 18:10:01,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:01,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094150754] [2021-01-20 18:10:01,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742652007] [2021-01-20 18:10:01,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:01,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:10:01,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:01,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:10:01,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:01,754 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:10:01,779 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:01,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:01,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-20 18:10:01,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616167193] [2021-01-20 18:10:01,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:10:01,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:01,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:10:01,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:10:01,800 INFO L87 Difference]: Start difference. First operand 93563 states and 273431 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:04,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:04,300 INFO L93 Difference]: Finished difference Result 95547 states and 279255 transitions. [2021-01-20 18:10:04,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 18:10:04,301 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-20 18:10:04,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:04,303 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=378, Invalid=1028, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 18:10:04,303 INFO L78 Accepts]: Start accepts. Automaton has 95547 states and 279255 transitions. Word has length 71 [2021-01-20 18:10:04,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:04,303 INFO L481 AbstractCegarLoop]: Abstraction has 95547 states and 279255 transitions. [2021-01-20 18:10:04,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:04,303 INFO L276 IsEmpty]: Start isEmpty. Operand 95547 states and 279255 transitions. [2021-01-20 18:10:04,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:10:04,473 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:04,473 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:10:04,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-20 18:10:04,674 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:04,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:04,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1726601048, now seen corresponding path program 35 times [2021-01-20 18:10:04,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:04,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731818987] [2021-01-20 18:10:04,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:04,907 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:04,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731818987] [2021-01-20 18:10:04,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149138248] [2021-01-20 18:10:04,907 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 [2021-01-20 18:10:04,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-20 18:10:04,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:04,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:10:04,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:05,019 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:05,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:05,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-20 18:10:05,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875280955] [2021-01-20 18:10:05,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:10:05,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:05,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:10:05,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:10:05,054 INFO L87 Difference]: Start difference. First operand 95547 states and 279255 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:06,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:06,164 INFO L93 Difference]: Finished difference Result 97531 states and 285079 transitions. [2021-01-20 18:10:06,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 18:10:06,165 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-20 18:10:06,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:06,166 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 18:10:06,166 INFO L78 Accepts]: Start accepts. Automaton has 97531 states and 285079 transitions. Word has length 71 [2021-01-20 18:10:06,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:06,167 INFO L481 AbstractCegarLoop]: Abstraction has 97531 states and 285079 transitions. [2021-01-20 18:10:06,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:06,167 INFO L276 IsEmpty]: Start isEmpty. Operand 97531 states and 285079 transitions. [2021-01-20 18:10:06,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:10:06,277 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:06,277 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:10:06,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:06,478 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:06,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:06,479 INFO L82 PathProgramCache]: Analyzing trace with hash -406694360, now seen corresponding path program 36 times [2021-01-20 18:10:06,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:06,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489689616] [2021-01-20 18:10:06,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:06,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:06,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489689616] [2021-01-20 18:10:06,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951451945] [2021-01-20 18:10:06,733 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 [2021-01-20 18:10:07,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-20 18:10:07,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:07,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:10:07,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:07,314 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:10:07,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:07,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:07,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-20 18:10:07,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922369683] [2021-01-20 18:10:07,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:10:07,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:07,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:10:07,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:10:07,346 INFO L87 Difference]: Start difference. First operand 97531 states and 285079 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:08,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:08,673 INFO L93 Difference]: Finished difference Result 100987 states and 295191 transitions. [2021-01-20 18:10:08,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-20 18:10:08,673 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-20 18:10:08,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:08,675 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=446, Invalid=1194, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 18:10:08,675 INFO L78 Accepts]: Start accepts. Automaton has 100987 states and 295191 transitions. Word has length 71 [2021-01-20 18:10:08,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:08,676 INFO L481 AbstractCegarLoop]: Abstraction has 100987 states and 295191 transitions. [2021-01-20 18:10:08,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:08,676 INFO L276 IsEmpty]: Start isEmpty. Operand 100987 states and 295191 transitions. [2021-01-20 18:10:08,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:10:08,785 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:08,785 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:10:08,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-20 18:10:08,987 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:08,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:08,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1483906518, now seen corresponding path program 37 times [2021-01-20 18:10:08,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:08,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245965803] [2021-01-20 18:10:08,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:09,193 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:09,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245965803] [2021-01-20 18:10:09,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33657679] [2021-01-20 18:10:09,193 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 [2021-01-20 18:10:09,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:09,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:10:09,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:09,319 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:09,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:09,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-20 18:10:09,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325521918] [2021-01-20 18:10:09,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:10:09,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:09,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:10:09,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:10:09,342 INFO L87 Difference]: Start difference. First operand 100987 states and 295191 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:11,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:11,007 INFO L93 Difference]: Finished difference Result 102971 states and 301015 transitions. [2021-01-20 18:10:11,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 18:10:11,008 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-20 18:10:11,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:11,009 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=458, Invalid=1182, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 18:10:11,009 INFO L78 Accepts]: Start accepts. Automaton has 102971 states and 301015 transitions. Word has length 71 [2021-01-20 18:10:11,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:11,010 INFO L481 AbstractCegarLoop]: Abstraction has 102971 states and 301015 transitions. [2021-01-20 18:10:11,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:11,011 INFO L276 IsEmpty]: Start isEmpty. Operand 102971 states and 301015 transitions. [2021-01-20 18:10:11,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:10:11,124 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:11,124 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:10:11,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-20 18:10:11,326 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:11,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:11,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1589354330, now seen corresponding path program 38 times [2021-01-20 18:10:11,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:11,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452426563] [2021-01-20 18:10:11,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:11,547 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:11,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452426563] [2021-01-20 18:10:11,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597373404] [2021-01-20 18:10:11,548 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 [2021-01-20 18:10:11,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:10:11,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:11,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:10:11,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:11,657 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:10:11,675 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:11,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:11,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-20 18:10:11,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244871146] [2021-01-20 18:10:11,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:10:11,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:11,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:10:11,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:10:11,686 INFO L87 Difference]: Start difference. First operand 102971 states and 301015 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:13,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:13,704 INFO L93 Difference]: Finished difference Result 104699 states and 306071 transitions. [2021-01-20 18:10:13,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-20 18:10:13,707 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-20 18:10:13,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:13,708 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=488, Invalid=1318, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 18:10:13,708 INFO L78 Accepts]: Start accepts. Automaton has 104699 states and 306071 transitions. Word has length 71 [2021-01-20 18:10:13,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:13,709 INFO L481 AbstractCegarLoop]: Abstraction has 104699 states and 306071 transitions. [2021-01-20 18:10:13,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:13,709 INFO L276 IsEmpty]: Start isEmpty. Operand 104699 states and 306071 transitions. [2021-01-20 18:10:13,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:10:13,841 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:13,841 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:10:14,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-20 18:10:14,050 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:14,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:14,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1615579604, now seen corresponding path program 39 times [2021-01-20 18:10:14,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:14,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781481512] [2021-01-20 18:10:14,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:14,299 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:14,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781481512] [2021-01-20 18:10:14,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613671041] [2021-01-20 18:10:14,300 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 [2021-01-20 18:10:14,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-20 18:10:14,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:14,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:10:14,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:14,425 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:14,442 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:14,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:14,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-20 18:10:14,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059933453] [2021-01-20 18:10:14,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:10:14,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:14,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:10:14,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:10:14,445 INFO L87 Difference]: Start difference. First operand 104699 states and 306071 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:16,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:16,017 INFO L93 Difference]: Finished difference Result 106555 states and 311511 transitions. [2021-01-20 18:10:16,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 18:10:16,018 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-20 18:10:16,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:16,020 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=520, Invalid=1286, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 18:10:16,020 INFO L78 Accepts]: Start accepts. Automaton has 106555 states and 311511 transitions. Word has length 71 [2021-01-20 18:10:16,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:16,020 INFO L481 AbstractCegarLoop]: Abstraction has 106555 states and 311511 transitions. [2021-01-20 18:10:16,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:16,020 INFO L276 IsEmpty]: Start isEmpty. Operand 106555 states and 311511 transitions. [2021-01-20 18:10:16,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:10:16,801 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:16,801 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:10:17,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-01-20 18:10:17,015 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:17,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:17,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1759784796, now seen corresponding path program 40 times [2021-01-20 18:10:17,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:17,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707468086] [2021-01-20 18:10:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:17,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707468086] [2021-01-20 18:10:17,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811105559] [2021-01-20 18:10:17,244 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:17,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:10:17,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:17,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:10:17,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:17,353 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:10:17,370 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:17,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:17,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-20 18:10:17,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933502026] [2021-01-20 18:10:17,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:10:17,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:17,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:10:17,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:10:17,381 INFO L87 Difference]: Start difference. First operand 106555 states and 311511 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:19,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:19,056 INFO L93 Difference]: Finished difference Result 109627 states and 320471 transitions. [2021-01-20 18:10:19,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 18:10:19,060 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-20 18:10:19,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:19,060 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=550, Invalid=1430, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 18:10:19,061 INFO L78 Accepts]: Start accepts. Automaton has 109627 states and 320471 transitions. Word has length 71 [2021-01-20 18:10:19,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:19,061 INFO L481 AbstractCegarLoop]: Abstraction has 109627 states and 320471 transitions. [2021-01-20 18:10:19,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:19,061 INFO L276 IsEmpty]: Start isEmpty. Operand 109627 states and 320471 transitions. [2021-01-20 18:10:19,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:10:19,169 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:19,169 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:10:19,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:19,381 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:19,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:19,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1407708878, now seen corresponding path program 41 times [2021-01-20 18:10:19,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:19,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230518149] [2021-01-20 18:10:19,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:19,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230518149] [2021-01-20 18:10:19,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952051678] [2021-01-20 18:10:19,575 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 [2021-01-20 18:10:20,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-20 18:10:20,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:20,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:10:20,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:20,175 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:20,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:20,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-20 18:10:20,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074532842] [2021-01-20 18:10:20,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:10:20,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:20,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:10:20,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:10:20,185 INFO L87 Difference]: Start difference. First operand 109627 states and 320471 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:21,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:21,646 INFO L93 Difference]: Finished difference Result 112891 states and 330071 transitions. [2021-01-20 18:10:21,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 18:10:21,647 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-20 18:10:21,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:21,648 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=602, Invalid=1378, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 18:10:21,648 INFO L78 Accepts]: Start accepts. Automaton has 112891 states and 330071 transitions. Word has length 71 [2021-01-20 18:10:21,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:21,648 INFO L481 AbstractCegarLoop]: Abstraction has 112891 states and 330071 transitions. [2021-01-20 18:10:21,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:21,648 INFO L276 IsEmpty]: Start isEmpty. Operand 112891 states and 330071 transitions. [2021-01-20 18:10:21,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:10:21,763 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:21,763 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:10:21,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-01-20 18:10:21,964 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:21,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:21,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1410682108, now seen corresponding path program 42 times [2021-01-20 18:10:21,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:21,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313391515] [2021-01-20 18:10:21,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:22,154 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:22,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313391515] [2021-01-20 18:10:22,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071380900] [2021-01-20 18:10:22,155 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 [2021-01-20 18:10:22,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-20 18:10:22,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:22,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:10:22,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:22,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:22,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:22,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-20 18:10:22,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158777392] [2021-01-20 18:10:22,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:10:22,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:22,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:10:22,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:10:22,302 INFO L87 Difference]: Start difference. First operand 112891 states and 330071 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:24,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:24,404 INFO L93 Difference]: Finished difference Result 113147 states and 330775 transitions. [2021-01-20 18:10:24,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 18:10:24,405 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-20 18:10:24,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:24,406 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=570, Invalid=1500, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 18:10:24,406 INFO L78 Accepts]: Start accepts. Automaton has 113147 states and 330775 transitions. Word has length 71 [2021-01-20 18:10:24,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:24,406 INFO L481 AbstractCegarLoop]: Abstraction has 113147 states and 330775 transitions. [2021-01-20 18:10:24,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:24,407 INFO L276 IsEmpty]: Start isEmpty. Operand 113147 states and 330775 transitions. [2021-01-20 18:10:24,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:10:24,534 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:24,534 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:10:24,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:24,736 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:24,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:24,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1682215820, now seen corresponding path program 43 times [2021-01-20 18:10:24,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:24,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600753618] [2021-01-20 18:10:24,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:24,995 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:24,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600753618] [2021-01-20 18:10:24,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752732991] [2021-01-20 18:10:24,996 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 [2021-01-20 18:10:25,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:25,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:10:25,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:25,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:25,124 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:25,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:25,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-20 18:10:25,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010282069] [2021-01-20 18:10:25,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 18:10:25,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:25,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 18:10:25,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-01-20 18:10:25,126 INFO L87 Difference]: Start difference. First operand 113147 states and 330775 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:26,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:26,864 INFO L93 Difference]: Finished difference Result 115771 states and 338519 transitions. [2021-01-20 18:10:26,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-20 18:10:26,865 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-20 18:10:26,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:26,866 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482 [2021-01-20 18:10:26,866 INFO L78 Accepts]: Start accepts. Automaton has 115771 states and 338519 transitions. Word has length 76 [2021-01-20 18:10:26,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:26,867 INFO L481 AbstractCegarLoop]: Abstraction has 115771 states and 338519 transitions. [2021-01-20 18:10:26,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:26,867 INFO L276 IsEmpty]: Start isEmpty. Operand 115771 states and 338519 transitions. [2021-01-20 18:10:27,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:10:27,019 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:27,019 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:10:27,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-20 18:10:27,220 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:27,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:27,222 INFO L82 PathProgramCache]: Analyzing trace with hash 247870558, now seen corresponding path program 44 times [2021-01-20 18:10:27,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:27,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938261310] [2021-01-20 18:10:27,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:27,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:27,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938261310] [2021-01-20 18:10:27,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017292228] [2021-01-20 18:10:27,536 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 [2021-01-20 18:10:27,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:10:27,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:27,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:10:27,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:27,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:10:27,712 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:27,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:27,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-01-20 18:10:27,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136518453] [2021-01-20 18:10:27,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:10:27,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:27,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:10:27,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:10:27,729 INFO L87 Difference]: Start difference. First operand 115771 states and 338519 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:29,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:29,959 INFO L93 Difference]: Finished difference Result 117755 states and 344343 transitions. [2021-01-20 18:10:29,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 18:10:29,960 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-20 18:10:29,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:29,961 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=535, Invalid=1357, Unknown=0, NotChecked=0, Total=1892 [2021-01-20 18:10:29,962 INFO L78 Accepts]: Start accepts. Automaton has 117755 states and 344343 transitions. Word has length 76 [2021-01-20 18:10:29,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:29,962 INFO L481 AbstractCegarLoop]: Abstraction has 117755 states and 344343 transitions. [2021-01-20 18:10:29,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:29,962 INFO L276 IsEmpty]: Start isEmpty. Operand 117755 states and 344343 transitions. [2021-01-20 18:10:30,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:10:30,068 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:30,068 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:10:30,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-01-20 18:10:30,269 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:30,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:30,270 INFO L82 PathProgramCache]: Analyzing trace with hash 2074066552, now seen corresponding path program 45 times [2021-01-20 18:10:30,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:30,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252516596] [2021-01-20 18:10:30,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:30,517 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:30,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252516596] [2021-01-20 18:10:30,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154575262] [2021-01-20 18:10:30,518 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 [2021-01-20 18:10:30,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-20 18:10:30,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:30,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-20 18:10:30,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:30,654 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:30,664 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:30,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:30,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-20 18:10:30,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874217220] [2021-01-20 18:10:30,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 18:10:30,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:30,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 18:10:30,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-01-20 18:10:30,666 INFO L87 Difference]: Start difference. First operand 117755 states and 344343 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:31,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:31,948 INFO L93 Difference]: Finished difference Result 119739 states and 350167 transitions. [2021-01-20 18:10:31,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 18:10:31,949 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-20 18:10:31,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:31,950 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=458, Invalid=1182, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 18:10:31,950 INFO L78 Accepts]: Start accepts. Automaton has 119739 states and 350167 transitions. Word has length 76 [2021-01-20 18:10:31,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:31,950 INFO L481 AbstractCegarLoop]: Abstraction has 119739 states and 350167 transitions. [2021-01-20 18:10:31,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:31,951 INFO L276 IsEmpty]: Start isEmpty. Operand 119739 states and 350167 transitions. [2021-01-20 18:10:32,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:10:32,085 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:32,085 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:10:32,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:32,286 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:32,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:32,287 INFO L82 PathProgramCache]: Analyzing trace with hash -59228856, now seen corresponding path program 46 times [2021-01-20 18:10:32,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:32,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466042703] [2021-01-20 18:10:32,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:33,162 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:33,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466042703] [2021-01-20 18:10:33,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719374437] [2021-01-20 18:10:33,163 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 [2021-01-20 18:10:33,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:10:33,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:33,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:10:33,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:33,282 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:10:33,328 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:33,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:33,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-01-20 18:10:33,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505729213] [2021-01-20 18:10:33,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:10:33,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:33,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:10:33,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:10:33,341 INFO L87 Difference]: Start difference. First operand 119739 states and 350167 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:34,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:34,951 INFO L93 Difference]: Finished difference Result 121595 states and 355607 transitions. [2021-01-20 18:10:34,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 18:10:34,952 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-20 18:10:34,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:34,953 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=565, Invalid=1505, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 18:10:34,953 INFO L78 Accepts]: Start accepts. Automaton has 121595 states and 355607 transitions. Word has length 76 [2021-01-20 18:10:34,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:34,953 INFO L481 AbstractCegarLoop]: Abstraction has 121595 states and 355607 transitions. [2021-01-20 18:10:34,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:34,953 INFO L276 IsEmpty]: Start isEmpty. Operand 121595 states and 355607 transitions. [2021-01-20 18:10:35,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:10:35,083 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:35,083 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:10:35,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-01-20 18:10:35,284 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:35,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:35,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1831372022, now seen corresponding path program 47 times [2021-01-20 18:10:35,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:35,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999434600] [2021-01-20 18:10:35,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:35,534 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:35,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999434600] [2021-01-20 18:10:35,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224530505] [2021-01-20 18:10:35,535 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 [2021-01-20 18:10:35,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-20 18:10:35,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:35,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:10:35,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:35,664 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:35,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:35,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-20 18:10:35,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155735771] [2021-01-20 18:10:35,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 18:10:35,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:35,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 18:10:35,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-01-20 18:10:35,675 INFO L87 Difference]: Start difference. First operand 121595 states and 355607 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:37,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:37,549 INFO L93 Difference]: Finished difference Result 123579 states and 361431 transitions. [2021-01-20 18:10:37,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 18:10:37,550 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-20 18:10:37,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:37,551 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 18:10:37,551 INFO L78 Accepts]: Start accepts. Automaton has 123579 states and 361431 transitions. Word has length 76 [2021-01-20 18:10:37,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:37,551 INFO L481 AbstractCegarLoop]: Abstraction has 123579 states and 361431 transitions. [2021-01-20 18:10:37,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:37,552 INFO L276 IsEmpty]: Start isEmpty. Operand 123579 states and 361431 transitions. [2021-01-20 18:10:37,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:10:37,688 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:37,688 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:10:37,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-01-20 18:10:37,889 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:37,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:37,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1241888826, now seen corresponding path program 48 times [2021-01-20 18:10:37,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:37,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805213453] [2021-01-20 18:10:37,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:37,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:38,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805213453] [2021-01-20 18:10:38,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661304442] [2021-01-20 18:10:38,128 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 [2021-01-20 18:10:38,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-20 18:10:38,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:38,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-20 18:10:38,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:38,290 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:38,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:38,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-01-20 18:10:38,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188201222] [2021-01-20 18:10:38,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:10:38,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:38,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:10:38,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:10:38,301 INFO L87 Difference]: Start difference. First operand 123579 states and 361431 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:40,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:40,573 INFO L93 Difference]: Finished difference Result 125307 states and 366487 transitions. [2021-01-20 18:10:40,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-20 18:10:40,574 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-20 18:10:40,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:40,574 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 18:10:40,574 INFO L78 Accepts]: Start accepts. Automaton has 125307 states and 366487 transitions. Word has length 76 [2021-01-20 18:10:40,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:40,575 INFO L481 AbstractCegarLoop]: Abstraction has 125307 states and 366487 transitions. [2021-01-20 18:10:40,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:40,575 INFO L276 IsEmpty]: Start isEmpty. Operand 125307 states and 366487 transitions. [2021-01-20 18:10:40,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:10:40,705 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:40,705 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:10:40,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-20 18:10:40,906 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:40,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:40,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1963045108, now seen corresponding path program 49 times [2021-01-20 18:10:40,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:40,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375397103] [2021-01-20 18:10:40,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:41,140 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:41,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375397103] [2021-01-20 18:10:41,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610830059] [2021-01-20 18:10:41,141 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 [2021-01-20 18:10:41,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:41,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:10:41,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:41,277 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:41,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:41,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-20 18:10:41,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117472771] [2021-01-20 18:10:41,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 18:10:41,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:41,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 18:10:41,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-01-20 18:10:41,292 INFO L87 Difference]: Start difference. First operand 125307 states and 366487 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:43,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:43,477 INFO L93 Difference]: Finished difference Result 127163 states and 371927 transitions. [2021-01-20 18:10:43,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 18:10:43,478 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-20 18:10:43,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:43,479 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=562, Invalid=1418, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 18:10:43,479 INFO L78 Accepts]: Start accepts. Automaton has 127163 states and 371927 transitions. Word has length 76 [2021-01-20 18:10:43,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:43,479 INFO L481 AbstractCegarLoop]: Abstraction has 127163 states and 371927 transitions. [2021-01-20 18:10:43,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:43,480 INFO L276 IsEmpty]: Start isEmpty. Operand 127163 states and 371927 transitions. [2021-01-20 18:10:43,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:10:43,609 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:43,610 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:10:43,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:43,816 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:43,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:43,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1412319292, now seen corresponding path program 50 times [2021-01-20 18:10:43,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:43,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665100854] [2021-01-20 18:10:43,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:44,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665100854] [2021-01-20 18:10:44,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167077028] [2021-01-20 18:10:44,047 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 [2021-01-20 18:10:44,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:10:44,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:44,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:10:44,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:44,165 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:10:44,222 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:44,235 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:44,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:44,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-01-20 18:10:44,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923894064] [2021-01-20 18:10:44,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:10:44,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:44,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:10:44,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:10:44,238 INFO L87 Difference]: Start difference. First operand 127163 states and 371927 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:46,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:46,840 INFO L93 Difference]: Finished difference Result 129275 states and 378071 transitions. [2021-01-20 18:10:46,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 18:10:46,841 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-20 18:10:46,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:46,842 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=685, Invalid=1765, Unknown=0, NotChecked=0, Total=2450 [2021-01-20 18:10:46,842 INFO L78 Accepts]: Start accepts. Automaton has 129275 states and 378071 transitions. Word has length 76 [2021-01-20 18:10:46,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:46,842 INFO L481 AbstractCegarLoop]: Abstraction has 129275 states and 378071 transitions. [2021-01-20 18:10:46,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:46,842 INFO L276 IsEmpty]: Start isEmpty. Operand 129275 states and 378071 transitions. [2021-01-20 18:10:46,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:10:46,950 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:46,951 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:10:47,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:47,152 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:47,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:47,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1060243374, now seen corresponding path program 51 times [2021-01-20 18:10:47,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:47,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210857244] [2021-01-20 18:10:47,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:47,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:47,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210857244] [2021-01-20 18:10:47,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41219899] [2021-01-20 18:10:47,371 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 [2021-01-20 18:10:47,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-20 18:10:47,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:47,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:10:47,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:47,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:47,530 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:47,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:47,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-20 18:10:47,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799391867] [2021-01-20 18:10:47,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 18:10:47,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:47,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 18:10:47,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-01-20 18:10:47,532 INFO L87 Difference]: Start difference. First operand 129275 states and 378071 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:49,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:49,228 INFO L93 Difference]: Finished difference Result 132411 states and 387287 transitions. [2021-01-20 18:10:49,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 18:10:49,229 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-20 18:10:49,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:49,230 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=644, Invalid=1518, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 18:10:49,230 INFO L78 Accepts]: Start accepts. Automaton has 132411 states and 387287 transitions. Word has length 76 [2021-01-20 18:10:49,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:49,230 INFO L481 AbstractCegarLoop]: Abstraction has 132411 states and 387287 transitions. [2021-01-20 18:10:49,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:49,231 INFO L276 IsEmpty]: Start isEmpty. Operand 132411 states and 387287 transitions. [2021-01-20 18:10:50,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:10:50,038 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:50,038 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:10:50,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:50,242 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:50,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:50,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1063216604, now seen corresponding path program 52 times [2021-01-20 18:10:50,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:50,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529849186] [2021-01-20 18:10:50,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:50,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529849186] [2021-01-20 18:10:50,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292070737] [2021-01-20 18:10:50,520 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 [2021-01-20 18:10:50,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:10:50,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:50,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:10:50,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:50,690 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:10:50,736 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:50,753 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:50,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:50,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-01-20 18:10:50,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761620154] [2021-01-20 18:10:50,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:10:50,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:50,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:10:50,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:10:50,758 INFO L87 Difference]: Start difference. First operand 132411 states and 387287 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:53,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:53,150 INFO L93 Difference]: Finished difference Result 135867 states and 397271 transitions. [2021-01-20 18:10:53,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-20 18:10:53,151 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-20 18:10:53,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:53,152 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=816, Invalid=2046, Unknown=0, NotChecked=0, Total=2862 [2021-01-20 18:10:53,152 INFO L78 Accepts]: Start accepts. Automaton has 135867 states and 397271 transitions. Word has length 76 [2021-01-20 18:10:53,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:53,153 INFO L481 AbstractCegarLoop]: Abstraction has 135867 states and 397271 transitions. [2021-01-20 18:10:53,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:53,153 INFO L276 IsEmpty]: Start isEmpty. Operand 135867 states and 397271 transitions. [2021-01-20 18:10:53,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:10:53,393 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:53,393 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:10:53,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:53,595 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:53,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:53,595 INFO L82 PathProgramCache]: Analyzing trace with hash -298810531, now seen corresponding path program 53 times [2021-01-20 18:10:53,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:53,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324260199] [2021-01-20 18:10:53,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:54,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324260199] [2021-01-20 18:10:54,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864468363] [2021-01-20 18:10:54,705 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 [2021-01-20 18:10:54,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-20 18:10:54,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:54,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:10:54,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:54,866 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:54,883 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:54,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:54,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-20 18:10:54,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251705186] [2021-01-20 18:10:54,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:10:54,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:54,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:10:54,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:10:54,885 INFO L87 Difference]: Start difference. First operand 135867 states and 397271 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:56,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:56,388 INFO L93 Difference]: Finished difference Result 138235 states and 404247 transitions. [2021-01-20 18:10:56,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 18:10:56,388 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-01-20 18:10:56,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:56,389 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=504, Invalid=1136, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 18:10:56,389 INFO L78 Accepts]: Start accepts. Automaton has 138235 states and 404247 transitions. Word has length 81 [2021-01-20 18:10:56,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:56,389 INFO L481 AbstractCegarLoop]: Abstraction has 138235 states and 404247 transitions. [2021-01-20 18:10:56,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:56,390 INFO L276 IsEmpty]: Start isEmpty. Operand 138235 states and 404247 transitions. [2021-01-20 18:10:56,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:10:56,541 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:56,541 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:10:56,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-01-20 18:10:56,742 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:56,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:56,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1053083055, now seen corresponding path program 54 times [2021-01-20 18:10:56,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:56,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392906481] [2021-01-20 18:10:56,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:57,053 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:57,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392906481] [2021-01-20 18:10:57,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331307339] [2021-01-20 18:10:57,054 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 [2021-01-20 18:10:57,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-20 18:10:57,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:57,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:10:57,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:57,173 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:10:57,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:10:57,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:57,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-01-20 18:10:57,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396934359] [2021-01-20 18:10:57,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:10:57,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:57,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:10:57,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:10:57,233 INFO L87 Difference]: Start difference. First operand 138235 states and 404247 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:59,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:59,469 INFO L93 Difference]: Finished difference Result 140347 states and 410455 transitions. [2021-01-20 18:10:59,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 18:10:59,469 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-01-20 18:10:59,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:59,470 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=545, Invalid=1435, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 18:10:59,470 INFO L78 Accepts]: Start accepts. Automaton has 140347 states and 410455 transitions. Word has length 81 [2021-01-20 18:10:59,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:59,470 INFO L481 AbstractCegarLoop]: Abstraction has 140347 states and 410455 transitions. [2021-01-20 18:10:59,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:10:59,471 INFO L276 IsEmpty]: Start isEmpty. Operand 140347 states and 410455 transitions. [2021-01-20 18:10:59,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:10:59,645 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:59,645 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:10:59,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:59,846 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:59,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:59,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1745619127, now seen corresponding path program 55 times [2021-01-20 18:10:59,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:59,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533014109] [2021-01-20 18:10:59,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:00,128 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:00,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533014109] [2021-01-20 18:11:00,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705578133] [2021-01-20 18:11:00,129 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 [2021-01-20 18:11:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:00,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:11:00,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:00,258 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:00,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:00,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-20 18:11:00,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706290749] [2021-01-20 18:11:00,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:11:00,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:00,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:11:00,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:11:00,276 INFO L87 Difference]: Start difference. First operand 140347 states and 410455 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:02,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:02,521 INFO L93 Difference]: Finished difference Result 142459 states and 416663 transitions. [2021-01-20 18:11:02,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-20 18:11:02,522 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-01-20 18:11:02,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:02,522 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=539, Invalid=1441, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 18:11:02,522 INFO L78 Accepts]: Start accepts. Automaton has 142459 states and 416663 transitions. Word has length 81 [2021-01-20 18:11:02,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:02,523 INFO L481 AbstractCegarLoop]: Abstraction has 142459 states and 416663 transitions. [2021-01-20 18:11:02,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:02,523 INFO L276 IsEmpty]: Start isEmpty. Operand 142459 states and 416663 transitions. [2021-01-20 18:11:02,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:11:02,698 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:02,699 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:02,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-01-20 18:11:02,900 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:02,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:02,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1956131353, now seen corresponding path program 56 times [2021-01-20 18:11:02,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:02,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998300794] [2021-01-20 18:11:02,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:02,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:03,225 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:03,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998300794] [2021-01-20 18:11:03,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919776103] [2021-01-20 18:11:03,226 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:03,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:11:03,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:03,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:11:03,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:03,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:11:03,406 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:03,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:03,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-01-20 18:11:03,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566169987] [2021-01-20 18:11:03,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:11:03,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:03,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:11:03,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:11:03,427 INFO L87 Difference]: Start difference. First operand 142459 states and 416663 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:05,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:05,963 INFO L93 Difference]: Finished difference Result 146043 states and 427159 transitions. [2021-01-20 18:11:05,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 18:11:05,964 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-01-20 18:11:05,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:05,964 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=620, Invalid=1636, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 18:11:05,964 INFO L78 Accepts]: Start accepts. Automaton has 146043 states and 427159 transitions. Word has length 81 [2021-01-20 18:11:05,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:05,965 INFO L481 AbstractCegarLoop]: Abstraction has 146043 states and 427159 transitions. [2021-01-20 18:11:05,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:05,965 INFO L276 IsEmpty]: Start isEmpty. Operand 146043 states and 427159 transitions. [2021-01-20 18:11:06,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:11:06,144 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:06,145 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:06,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:06,352 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:06,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:06,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1783445575, now seen corresponding path program 57 times [2021-01-20 18:11:06,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:06,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880772488] [2021-01-20 18:11:06,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:06,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:06,661 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:06,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880772488] [2021-01-20 18:11:06,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831661557] [2021-01-20 18:11:06,662 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 [2021-01-20 18:11:06,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-20 18:11:06,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:06,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-20 18:11:06,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:06,822 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:06,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:06,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-20 18:11:06,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273440994] [2021-01-20 18:11:06,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:11:06,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:06,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:11:06,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:11:06,844 INFO L87 Difference]: Start difference. First operand 146043 states and 427159 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:09,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:09,377 INFO L93 Difference]: Finished difference Result 148155 states and 433367 transitions. [2021-01-20 18:11:09,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 18:11:09,378 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-01-20 18:11:09,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:09,379 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=627, Invalid=1629, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 18:11:09,379 INFO L78 Accepts]: Start accepts. Automaton has 148155 states and 433367 transitions. Word has length 81 [2021-01-20 18:11:09,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:09,379 INFO L481 AbstractCegarLoop]: Abstraction has 148155 states and 433367 transitions. [2021-01-20 18:11:09,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:09,380 INFO L276 IsEmpty]: Start isEmpty. Operand 148155 states and 433367 transitions. [2021-01-20 18:11:09,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:11:09,609 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:09,609 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:09,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-01-20 18:11:09,815 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:09,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:09,816 INFO L82 PathProgramCache]: Analyzing trace with hash -349849833, now seen corresponding path program 58 times [2021-01-20 18:11:09,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:09,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540032735] [2021-01-20 18:11:09,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:10,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540032735] [2021-01-20 18:11:10,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876217653] [2021-01-20 18:11:10,134 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 [2021-01-20 18:11:10,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:11:10,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:10,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-20 18:11:10,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:10,273 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:11:10,331 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:10,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:10,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-01-20 18:11:10,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927800496] [2021-01-20 18:11:10,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:11:10,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:10,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:11:10,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:11:10,358 INFO L87 Difference]: Start difference. First operand 148155 states and 433367 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:13,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:13,194 INFO L93 Difference]: Finished difference Result 150011 states and 438807 transitions. [2021-01-20 18:11:13,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-20 18:11:13,195 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-01-20 18:11:13,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:13,195 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=659, Invalid=1791, Unknown=0, NotChecked=0, Total=2450 [2021-01-20 18:11:13,196 INFO L78 Accepts]: Start accepts. Automaton has 150011 states and 438807 transitions. Word has length 81 [2021-01-20 18:11:13,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:13,196 INFO L481 AbstractCegarLoop]: Abstraction has 150011 states and 438807 transitions. [2021-01-20 18:11:13,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:13,196 INFO L276 IsEmpty]: Start isEmpty. Operand 150011 states and 438807 transitions. [2021-01-20 18:11:13,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:11:13,367 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:13,367 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:13,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:13,568 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:13,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:13,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1540751045, now seen corresponding path program 59 times [2021-01-20 18:11:13,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:13,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846554458] [2021-01-20 18:11:13,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:13,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846554458] [2021-01-20 18:11:13,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530284784] [2021-01-20 18:11:13,833 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 [2021-01-20 18:11:13,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-20 18:11:13,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:13,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:11:13,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:13,970 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:13,979 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:13,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:13,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-20 18:11:13,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555036145] [2021-01-20 18:11:13,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:11:13,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:13,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:11:13,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:11:13,981 INFO L87 Difference]: Start difference. First operand 150011 states and 438807 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:16,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:16,583 INFO L93 Difference]: Finished difference Result 151995 states and 444631 transitions. [2021-01-20 18:11:16,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 18:11:16,587 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-01-20 18:11:16,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:16,588 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=686, Invalid=1764, Unknown=0, NotChecked=0, Total=2450 [2021-01-20 18:11:16,588 INFO L78 Accepts]: Start accepts. Automaton has 151995 states and 444631 transitions. Word has length 81 [2021-01-20 18:11:16,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:16,588 INFO L481 AbstractCegarLoop]: Abstraction has 151995 states and 444631 transitions. [2021-01-20 18:11:16,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:16,588 INFO L276 IsEmpty]: Start isEmpty. Operand 151995 states and 444631 transitions. [2021-01-20 18:11:16,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:11:16,852 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:16,852 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:17,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:17,053 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:17,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:17,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1532509803, now seen corresponding path program 60 times [2021-01-20 18:11:17,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:17,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304852157] [2021-01-20 18:11:17,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:17,318 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:17,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304852157] [2021-01-20 18:11:17,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747436445] [2021-01-20 18:11:17,319 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 [2021-01-20 18:11:17,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-20 18:11:17,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:17,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-20 18:11:17,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:17,485 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:17,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:17,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-01-20 18:11:17,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223687227] [2021-01-20 18:11:17,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:11:17,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:17,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:11:17,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:11:17,502 INFO L87 Difference]: Start difference. First operand 151995 states and 444631 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:19,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:19,576 INFO L93 Difference]: Finished difference Result 153723 states and 449687 transitions. [2021-01-20 18:11:19,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-20 18:11:19,577 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-01-20 18:11:19,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:19,578 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=694, Invalid=1958, Unknown=0, NotChecked=0, Total=2652 [2021-01-20 18:11:19,578 INFO L78 Accepts]: Start accepts. Automaton has 153723 states and 449687 transitions. Word has length 81 [2021-01-20 18:11:19,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:19,578 INFO L481 AbstractCegarLoop]: Abstraction has 153723 states and 449687 transitions. [2021-01-20 18:11:19,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:19,578 INFO L276 IsEmpty]: Start isEmpty. Operand 153723 states and 449687 transitions. [2021-01-20 18:11:20,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:11:20,531 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:20,531 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:20,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-01-20 18:11:20,746 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:20,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:20,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1672424131, now seen corresponding path program 61 times [2021-01-20 18:11:20,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:20,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597985449] [2021-01-20 18:11:20,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:20,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:21,000 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:21,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597985449] [2021-01-20 18:11:21,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424988676] [2021-01-20 18:11:21,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:21,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:11:21,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:21,132 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:21,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:21,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-20 18:11:21,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493514440] [2021-01-20 18:11:21,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:11:21,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:21,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:11:21,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:11:21,147 INFO L87 Difference]: Start difference. First operand 153723 states and 449687 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:23,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:23,011 INFO L93 Difference]: Finished difference Result 155579 states and 455127 transitions. [2021-01-20 18:11:23,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 18:11:23,011 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-01-20 18:11:23,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:23,012 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=765, Invalid=1887, Unknown=0, NotChecked=0, Total=2652 [2021-01-20 18:11:23,012 INFO L78 Accepts]: Start accepts. Automaton has 155579 states and 455127 transitions. Word has length 81 [2021-01-20 18:11:23,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:23,013 INFO L481 AbstractCegarLoop]: Abstraction has 155579 states and 455127 transitions. [2021-01-20 18:11:23,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:23,013 INFO L276 IsEmpty]: Start isEmpty. Operand 155579 states and 455127 transitions. [2021-01-20 18:11:23,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:11:23,992 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:23,992 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:24,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:24,205 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:24,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:24,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1702940269, now seen corresponding path program 62 times [2021-01-20 18:11:24,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:24,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116701520] [2021-01-20 18:11:24,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:24,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:24,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116701520] [2021-01-20 18:11:24,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676668683] [2021-01-20 18:11:24,497 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 [2021-01-20 18:11:24,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:11:24,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:24,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:11:24,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:24,637 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:11:24,692 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:24,711 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:24,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:24,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-01-20 18:11:24,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801519855] [2021-01-20 18:11:24,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:11:24,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:24,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:11:24,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:11:24,714 INFO L87 Difference]: Start difference. First operand 155579 states and 455127 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:27,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:27,294 INFO L93 Difference]: Finished difference Result 157819 states and 461655 transitions. [2021-01-20 18:11:27,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-20 18:11:27,295 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-01-20 18:11:27,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:27,296 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=797, Invalid=2065, Unknown=0, NotChecked=0, Total=2862 [2021-01-20 18:11:27,296 INFO L78 Accepts]: Start accepts. Automaton has 157819 states and 461655 transitions. Word has length 81 [2021-01-20 18:11:27,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:27,297 INFO L481 AbstractCegarLoop]: Abstraction has 157819 states and 461655 transitions. [2021-01-20 18:11:27,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:27,298 INFO L276 IsEmpty]: Start isEmpty. Operand 157819 states and 461655 transitions. [2021-01-20 18:11:27,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:11:27,490 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:27,490 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:27,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:27,691 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:27,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:27,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1350864351, now seen corresponding path program 63 times [2021-01-20 18:11:27,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:27,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915500291] [2021-01-20 18:11:27,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:28,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915500291] [2021-01-20 18:11:28,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079460244] [2021-01-20 18:11:28,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:28,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-20 18:11:28,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:28,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:11:28,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:29,038 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:29,048 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:29,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:29,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-20 18:11:29,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22456790] [2021-01-20 18:11:29,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:11:29,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:29,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:11:29,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:11:29,050 INFO L87 Difference]: Start difference. First operand 157819 states and 461655 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:31,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:31,094 INFO L93 Difference]: Finished difference Result 161083 states and 471255 transitions. [2021-01-20 18:11:31,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-20 18:11:31,095 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-01-20 18:11:31,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:31,096 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=864, Invalid=1998, Unknown=0, NotChecked=0, Total=2862 [2021-01-20 18:11:31,096 INFO L78 Accepts]: Start accepts. Automaton has 161083 states and 471255 transitions. Word has length 81 [2021-01-20 18:11:31,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:31,096 INFO L481 AbstractCegarLoop]: Abstraction has 161083 states and 471255 transitions. [2021-01-20 18:11:31,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:31,097 INFO L276 IsEmpty]: Start isEmpty. Operand 161083 states and 471255 transitions. [2021-01-20 18:11:31,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:11:31,275 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:31,275 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:31,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-01-20 18:11:31,477 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:31,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:31,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1353837581, now seen corresponding path program 64 times [2021-01-20 18:11:31,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:31,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998313447] [2021-01-20 18:11:31,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:31,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998313447] [2021-01-20 18:11:31,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240538261] [2021-01-20 18:11:31,758 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:32,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:11:32,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:32,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-20 18:11:32,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:32,896 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:11:32,931 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:32,947 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:32,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:32,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-01-20 18:11:32,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606144198] [2021-01-20 18:11:32,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:11:32,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:32,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:11:32,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:11:32,949 INFO L87 Difference]: Start difference. First operand 161083 states and 471255 transitions. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:35,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:35,403 INFO L93 Difference]: Finished difference Result 164795 states and 482007 transitions. [2021-01-20 18:11:35,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-20 18:11:35,404 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-01-20 18:11:35,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:35,405 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=940, Invalid=2366, Unknown=0, NotChecked=0, Total=3306 [2021-01-20 18:11:35,405 INFO L78 Accepts]: Start accepts. Automaton has 164795 states and 482007 transitions. Word has length 81 [2021-01-20 18:11:35,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:35,405 INFO L481 AbstractCegarLoop]: Abstraction has 164795 states and 482007 transitions. [2021-01-20 18:11:35,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:35,405 INFO L276 IsEmpty]: Start isEmpty. Operand 164795 states and 482007 transitions. [2021-01-20 18:11:35,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:11:35,607 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:35,608 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:35,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:35,809 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:35,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:35,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1585971837, now seen corresponding path program 65 times [2021-01-20 18:11:35,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:35,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019202555] [2021-01-20 18:11:35,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:36,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019202555] [2021-01-20 18:11:36,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808772939] [2021-01-20 18:11:36,962 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:37,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-20 18:11:37,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:37,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:11:37,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:37,090 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:37,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:37,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-20 18:11:37,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820959597] [2021-01-20 18:11:37,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:11:37,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:37,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:11:37,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:11:37,110 INFO L87 Difference]: Start difference. First operand 164795 states and 482007 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:38,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:38,708 INFO L93 Difference]: Finished difference Result 167675 states and 490519 transitions. [2021-01-20 18:11:38,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-20 18:11:38,709 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-01-20 18:11:38,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:38,709 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=583, Invalid=1397, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 18:11:38,709 INFO L78 Accepts]: Start accepts. Automaton has 167675 states and 490519 transitions. Word has length 86 [2021-01-20 18:11:38,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:38,710 INFO L481 AbstractCegarLoop]: Abstraction has 167675 states and 490519 transitions. [2021-01-20 18:11:38,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:38,710 INFO L276 IsEmpty]: Start isEmpty. Operand 167675 states and 490519 transitions. [2021-01-20 18:11:38,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:11:38,920 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:38,920 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:39,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-01-20 18:11:39,121 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:39,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:39,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1357101873, now seen corresponding path program 66 times [2021-01-20 18:11:39,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:39,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245839979] [2021-01-20 18:11:39,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:39,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:39,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245839979] [2021-01-20 18:11:39,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961216872] [2021-01-20 18:11:39,510 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:39,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-20 18:11:39,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:39,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:11:39,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:39,632 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:11:39,687 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:40,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:40,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-01-20 18:11:40,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709327605] [2021-01-20 18:11:40,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 18:11:40,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:40,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 18:11:40,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-01-20 18:11:40,494 INFO L87 Difference]: Start difference. First operand 167675 states and 490519 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:43,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:43,470 INFO L93 Difference]: Finished difference Result 169787 states and 496727 transitions. [2021-01-20 18:11:43,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 18:11:43,471 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-01-20 18:11:43,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:43,473 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=692, Invalid=1758, Unknown=0, NotChecked=0, Total=2450 [2021-01-20 18:11:43,473 INFO L78 Accepts]: Start accepts. Automaton has 169787 states and 496727 transitions. Word has length 86 [2021-01-20 18:11:43,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:43,473 INFO L481 AbstractCegarLoop]: Abstraction has 169787 states and 496727 transitions. [2021-01-20 18:11:43,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:43,474 INFO L276 IsEmpty]: Start isEmpty. Operand 169787 states and 496727 transitions. [2021-01-20 18:11:43,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:11:43,738 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:43,738 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:43,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-01-20 18:11:43,952 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:43,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:43,952 INFO L82 PathProgramCache]: Analyzing trace with hash 139163241, now seen corresponding path program 67 times [2021-01-20 18:11:43,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:43,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546335899] [2021-01-20 18:11:43,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:44,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546335899] [2021-01-20 18:11:44,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154415190] [2021-01-20 18:11:44,517 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:44,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:44,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:11:44,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:44,649 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:44,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:44,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-20 18:11:44,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546458024] [2021-01-20 18:11:44,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:11:44,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:44,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:11:44,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:11:44,669 INFO L87 Difference]: Start difference. First operand 169787 states and 496727 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:47,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:47,508 INFO L93 Difference]: Finished difference Result 171899 states and 502935 transitions. [2021-01-20 18:11:47,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 18:11:47,509 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-01-20 18:11:47,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:47,510 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=603, Invalid=1559, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 18:11:47,510 INFO L78 Accepts]: Start accepts. Automaton has 171899 states and 502935 transitions. Word has length 86 [2021-01-20 18:11:47,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:47,510 INFO L481 AbstractCegarLoop]: Abstraction has 171899 states and 502935 transitions. [2021-01-20 18:11:47,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:47,511 INFO L276 IsEmpty]: Start isEmpty. Operand 171899 states and 502935 transitions. [2021-01-20 18:11:47,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:11:47,844 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:47,847 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:48,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-01-20 18:11:48,061 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:48,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:48,062 INFO L82 PathProgramCache]: Analyzing trace with hash -454053575, now seen corresponding path program 68 times [2021-01-20 18:11:48,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:48,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239737848] [2021-01-20 18:11:48,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:48,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239737848] [2021-01-20 18:11:48,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994920836] [2021-01-20 18:11:48,469 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:48,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:11:48,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:48,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:11:48,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:48,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:11:48,656 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:48,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:48,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-01-20 18:11:48,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98218765] [2021-01-20 18:11:48,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 18:11:48,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:48,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 18:11:48,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-01-20 18:11:48,678 INFO L87 Difference]: Start difference. First operand 171899 states and 502935 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:51,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:51,890 INFO L93 Difference]: Finished difference Result 173883 states and 508759 transitions. [2021-01-20 18:11:51,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 18:11:51,891 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-01-20 18:11:51,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:51,892 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=720, Invalid=1932, Unknown=0, NotChecked=0, Total=2652 [2021-01-20 18:11:51,892 INFO L78 Accepts]: Start accepts. Automaton has 173883 states and 508759 transitions. Word has length 86 [2021-01-20 18:11:51,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:51,892 INFO L481 AbstractCegarLoop]: Abstraction has 173883 states and 508759 transitions. [2021-01-20 18:11:51,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:51,893 INFO L276 IsEmpty]: Start isEmpty. Operand 173883 states and 508759 transitions. [2021-01-20 18:11:52,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:11:52,164 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:52,165 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:52,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:52,379 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:52,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:52,380 INFO L82 PathProgramCache]: Analyzing trace with hash -626739353, now seen corresponding path program 69 times [2021-01-20 18:11:52,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:52,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733427739] [2021-01-20 18:11:52,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:52,752 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:52,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733427739] [2021-01-20 18:11:52,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313336716] [2021-01-20 18:11:52,754 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:52,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-20 18:11:52,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:52,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-20 18:11:52,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:52,977 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:53,014 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:53,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:53,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-20 18:11:53,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328443834] [2021-01-20 18:11:53,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:11:53,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:53,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:11:53,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:11:53,019 INFO L87 Difference]: Start difference. First operand 173883 states and 508759 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:56,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:56,111 INFO L93 Difference]: Finished difference Result 175995 states and 514967 transitions. [2021-01-20 18:11:56,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 18:11:56,113 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-01-20 18:11:56,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:56,114 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=643, Invalid=1709, Unknown=0, NotChecked=0, Total=2352 [2021-01-20 18:11:56,114 INFO L78 Accepts]: Start accepts. Automaton has 175995 states and 514967 transitions. Word has length 86 [2021-01-20 18:11:56,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:56,114 INFO L481 AbstractCegarLoop]: Abstraction has 175995 states and 514967 transitions. [2021-01-20 18:11:56,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:56,114 INFO L276 IsEmpty]: Start isEmpty. Operand 175995 states and 514967 transitions. [2021-01-20 18:11:56,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:11:56,439 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:56,439 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:56,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:56,652 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:56,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:56,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1534932535, now seen corresponding path program 70 times [2021-01-20 18:11:56,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:56,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86970556] [2021-01-20 18:11:56,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:56,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:57,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86970556] [2021-01-20 18:11:57,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202411372] [2021-01-20 18:11:57,032 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:57,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:11:57,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:57,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-20 18:11:57,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:57,160 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:11:57,241 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:57,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:57,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-01-20 18:11:57,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735779959] [2021-01-20 18:11:57,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 18:11:57,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:57,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 18:11:57,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-01-20 18:11:57,263 INFO L87 Difference]: Start difference. First operand 175995 states and 514967 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:00,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:00,699 INFO L93 Difference]: Finished difference Result 177851 states and 520407 transitions. [2021-01-20 18:12:00,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 18:12:00,700 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-01-20 18:12:00,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:00,701 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=768, Invalid=2094, Unknown=0, NotChecked=0, Total=2862 [2021-01-20 18:12:00,701 INFO L78 Accepts]: Start accepts. Automaton has 177851 states and 520407 transitions. Word has length 86 [2021-01-20 18:12:00,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:00,701 INFO L481 AbstractCegarLoop]: Abstraction has 177851 states and 520407 transitions. [2021-01-20 18:12:00,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:00,702 INFO L276 IsEmpty]: Start isEmpty. Operand 177851 states and 520407 transitions. [2021-01-20 18:12:00,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:12:00,985 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:00,985 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:01,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:12:01,199 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:01,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:01,200 INFO L82 PathProgramCache]: Analyzing trace with hash -869433883, now seen corresponding path program 71 times [2021-01-20 18:12:01,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:01,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110997516] [2021-01-20 18:12:01,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:01,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110997516] [2021-01-20 18:12:01,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802728263] [2021-01-20 18:12:01,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 18:12:01,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-20 18:12:01,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:12:01,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:12:01,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:01,708 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:01,724 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:01,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:01,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-20 18:12:01,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101607942] [2021-01-20 18:12:01,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:12:01,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:01,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:12:01,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:12:01,729 INFO L87 Difference]: Start difference. First operand 177851 states and 520407 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:04,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:04,926 INFO L93 Difference]: Finished difference Result 179835 states and 526231 transitions. [2021-01-20 18:12:04,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 18:12:04,927 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-01-20 18:12:04,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:04,928 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=703, Invalid=1847, Unknown=0, NotChecked=0, Total=2550 [2021-01-20 18:12:04,928 INFO L78 Accepts]: Start accepts. Automaton has 179835 states and 526231 transitions. Word has length 86 [2021-01-20 18:12:04,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:04,928 INFO L481 AbstractCegarLoop]: Abstraction has 179835 states and 526231 transitions. [2021-01-20 18:12:04,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:04,929 INFO L276 IsEmpty]: Start isEmpty. Operand 179835 states and 526231 transitions. [2021-01-20 18:12:05,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:12:05,212 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:05,212 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:05,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:12:05,429 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:05,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:05,432 INFO L82 PathProgramCache]: Analyzing trace with hash 352272565, now seen corresponding path program 72 times [2021-01-20 18:12:05,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:05,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155489610] [2021-01-20 18:12:05,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:05,694 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:05,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155489610] [2021-01-20 18:12:05,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727794199] [2021-01-20 18:12:05,695 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 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 [2021-01-20 18:12:05,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-20 18:12:05,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:12:05,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-20 18:12:05,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:05,852 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:05,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:05,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-01-20 18:12:05,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090184869] [2021-01-20 18:12:05,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 18:12:05,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:05,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 18:12:05,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-01-20 18:12:05,867 INFO L87 Difference]: Start difference. First operand 179835 states and 526231 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:09,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:09,069 INFO L93 Difference]: Finished difference Result 181563 states and 531287 transitions. [2021-01-20 18:12:09,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-20 18:12:09,070 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-01-20 18:12:09,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:09,071 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=705, Invalid=2051, Unknown=0, NotChecked=0, Total=2756 [2021-01-20 18:12:09,071 INFO L78 Accepts]: Start accepts. Automaton has 181563 states and 531287 transitions. Word has length 86 [2021-01-20 18:12:09,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:09,075 INFO L481 AbstractCegarLoop]: Abstraction has 181563 states and 531287 transitions. [2021-01-20 18:12:09,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:09,075 INFO L276 IsEmpty]: Start isEmpty. Operand 181563 states and 531287 transitions. [2021-01-20 18:12:09,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:12:09,545 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:09,546 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:09,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-01-20 18:12:09,760 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:09,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:09,760 INFO L82 PathProgramCache]: Analyzing trace with hash -737760797, now seen corresponding path program 73 times [2021-01-20 18:12:09,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:09,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170743366] [2021-01-20 18:12:09,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:10,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170743366] [2021-01-20 18:12:10,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844063235] [2021-01-20 18:12:10,094 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 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 [2021-01-20 18:12:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:10,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:12:10,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:10,212 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:10,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:10,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-20 18:12:10,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450223035] [2021-01-20 18:12:10,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:12:10,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:10,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:12:10,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:12:10,229 INFO L87 Difference]: Start difference. First operand 181563 states and 531287 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:13,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:13,487 INFO L93 Difference]: Finished difference Result 183419 states and 536727 transitions. [2021-01-20 18:12:13,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 18:12:13,488 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-01-20 18:12:13,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:13,489 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=783, Invalid=1973, Unknown=0, NotChecked=0, Total=2756 [2021-01-20 18:12:13,490 INFO L78 Accepts]: Start accepts. Automaton has 183419 states and 536727 transitions. Word has length 86 [2021-01-20 18:12:13,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:13,490 INFO L481 AbstractCegarLoop]: Abstraction has 183419 states and 536727 transitions. [2021-01-20 18:12:13,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:13,492 INFO L276 IsEmpty]: Start isEmpty. Operand 183419 states and 536727 transitions. [2021-01-20 18:12:13,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:12:13,761 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:13,761 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:13,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:12:13,975 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:13,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:13,975 INFO L82 PathProgramCache]: Analyzing trace with hash 181842099, now seen corresponding path program 74 times [2021-01-20 18:12:13,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:13,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488181305] [2021-01-20 18:12:13,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:13,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:14,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488181305] [2021-01-20 18:12:14,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220754277] [2021-01-20 18:12:14,239 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 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 [2021-01-20 18:12:14,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:12:14,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:12:14,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:12:14,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:14,346 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:12:14,388 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:14,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:14,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-01-20 18:12:14,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123251998] [2021-01-20 18:12:14,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 18:12:14,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:14,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 18:12:14,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-01-20 18:12:14,404 INFO L87 Difference]: Start difference. First operand 183419 states and 536727 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:18,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:18,263 INFO L93 Difference]: Finished difference Result 186299 states and 545111 transitions. [2021-01-20 18:12:18,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-20 18:12:18,264 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-01-20 18:12:18,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:18,265 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=924, Invalid=2382, Unknown=0, NotChecked=0, Total=3306 [2021-01-20 18:12:18,265 INFO L78 Accepts]: Start accepts. Automaton has 186299 states and 545111 transitions. Word has length 86 [2021-01-20 18:12:18,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:18,265 INFO L481 AbstractCegarLoop]: Abstraction has 186299 states and 545111 transitions. [2021-01-20 18:12:18,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:18,266 INFO L276 IsEmpty]: Start isEmpty. Operand 186299 states and 545111 transitions. [2021-01-20 18:12:18,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:12:18,577 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:18,577 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:18,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:12:18,791 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:18,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:18,792 INFO L82 PathProgramCache]: Analyzing trace with hash 533918017, now seen corresponding path program 75 times [2021-01-20 18:12:18,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:18,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664010252] [2021-01-20 18:12:18,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:19,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664010252] [2021-01-20 18:12:19,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231347784] [2021-01-20 18:12:19,110 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 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 [2021-01-20 18:12:19,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-20 18:12:19,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:12:19,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-20 18:12:19,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:19,313 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:19,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:19,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-20 18:12:19,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329910512] [2021-01-20 18:12:19,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:12:19,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:19,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:12:19,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:12:19,342 INFO L87 Difference]: Start difference. First operand 186299 states and 545111 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:22,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:22,761 INFO L93 Difference]: Finished difference Result 189563 states and 554711 transitions. [2021-01-20 18:12:22,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-20 18:12:22,762 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-01-20 18:12:22,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:22,763 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=883, Invalid=2087, Unknown=0, NotChecked=0, Total=2970 [2021-01-20 18:12:22,763 INFO L78 Accepts]: Start accepts. Automaton has 189563 states and 554711 transitions. Word has length 86 [2021-01-20 18:12:22,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:22,763 INFO L481 AbstractCegarLoop]: Abstraction has 189563 states and 554711 transitions. [2021-01-20 18:12:22,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:22,764 INFO L276 IsEmpty]: Start isEmpty. Operand 189563 states and 554711 transitions. [2021-01-20 18:12:23,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:12:23,082 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:23,082 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:23,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:12:23,300 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:23,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:23,300 INFO L82 PathProgramCache]: Analyzing trace with hash 530944787, now seen corresponding path program 76 times [2021-01-20 18:12:23,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:23,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509542247] [2021-01-20 18:12:23,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:24,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509542247] [2021-01-20 18:12:24,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646612693] [2021-01-20 18:12:24,310 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 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 [2021-01-20 18:12:24,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:12:24,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:12:24,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-20 18:12:24,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:24,826 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:12:24,861 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:24,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:24,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-01-20 18:12:24,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958653810] [2021-01-20 18:12:24,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 18:12:24,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:24,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 18:12:24,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-01-20 18:12:24,874 INFO L87 Difference]: Start difference. First operand 189563 states and 554711 transitions. Second operand has 19 states, 19 states have (on average 4.684210526315789) internal successors, (89), 19 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:29,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:29,091 INFO L93 Difference]: Finished difference Result 190907 states and 558551 transitions. [2021-01-20 18:12:29,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-20 18:12:29,093 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.684210526315789) internal successors, (89), 19 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-01-20 18:12:29,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:29,094 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1079, Invalid=2703, Unknown=0, NotChecked=0, Total=3782 [2021-01-20 18:12:29,094 INFO L78 Accepts]: Start accepts. Automaton has 190907 states and 558551 transitions. Word has length 86 [2021-01-20 18:12:29,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:29,094 INFO L481 AbstractCegarLoop]: Abstraction has 190907 states and 558551 transitions. [2021-01-20 18:12:29,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.684210526315789) internal successors, (89), 19 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:29,109 INFO L276 IsEmpty]: Start isEmpty. Operand 190907 states and 558551 transitions. [2021-01-20 18:12:29,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-20 18:12:29,496 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:29,496 INFO L504 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:29,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:12:29,711 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:29,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:29,712 INFO L82 PathProgramCache]: Analyzing trace with hash -800382706, now seen corresponding path program 77 times [2021-01-20 18:12:29,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:29,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715045000] [2021-01-20 18:12:29,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:30,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715045000] [2021-01-20 18:12:30,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482459009] [2021-01-20 18:12:30,120 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 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 [2021-01-20 18:12:30,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-20 18:12:30,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:12:30,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-20 18:12:30,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:30,720 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:30,767 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:30,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:30,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-20 18:12:30,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835790875] [2021-01-20 18:12:30,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 18:12:30,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:30,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 18:12:30,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-01-20 18:12:30,772 INFO L87 Difference]: Start difference. First operand 190907 states and 558551 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:33,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:33,888 INFO L93 Difference]: Finished difference Result 193403 states and 565911 transitions. [2021-01-20 18:12:33,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 18:12:33,890 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-01-20 18:12:33,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:33,890 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=663, Invalid=1499, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 18:12:33,890 INFO L78 Accepts]: Start accepts. Automaton has 193403 states and 565911 transitions. Word has length 91 [2021-01-20 18:12:33,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:33,891 INFO L481 AbstractCegarLoop]: Abstraction has 193403 states and 565911 transitions. [2021-01-20 18:12:33,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:33,891 INFO L276 IsEmpty]: Start isEmpty. Operand 193403 states and 565911 transitions. [2021-01-20 18:12:34,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-20 18:12:34,225 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:34,226 INFO L504 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:34,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-01-20 18:12:34,441 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:34,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:34,442 INFO L82 PathProgramCache]: Analyzing trace with hash 523642080, now seen corresponding path program 78 times [2021-01-20 18:12:34,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:34,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956180190] [2021-01-20 18:12:34,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:34,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956180190] [2021-01-20 18:12:34,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302914436] [2021-01-20 18:12:34,901 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 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 [2021-01-20 18:12:35,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-20 18:12:35,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:12:35,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-20 18:12:35,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:35,041 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:12:35,097 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:35,119 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:35,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:35,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-01-20 18:12:35,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535367781] [2021-01-20 18:12:35,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 18:12:35,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:35,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 18:12:35,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-01-20 18:12:35,122 INFO L87 Difference]: Start difference. First operand 193403 states and 565911 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:38,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:38,376 INFO L93 Difference]: Finished difference Result 195643 states and 572503 transitions. [2021-01-20 18:12:38,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 18:12:38,376 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-01-20 18:12:38,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:38,377 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=706, Invalid=1844, Unknown=0, NotChecked=0, Total=2550 [2021-01-20 18:12:38,378 INFO L78 Accepts]: Start accepts. Automaton has 195643 states and 572503 transitions. Word has length 91 [2021-01-20 18:12:38,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:38,378 INFO L481 AbstractCegarLoop]: Abstraction has 195643 states and 572503 transitions. [2021-01-20 18:12:38,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:38,378 INFO L276 IsEmpty]: Start isEmpty. Operand 195643 states and 572503 transitions. [2021-01-20 18:12:38,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-20 18:12:38,844 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:38,846 INFO L504 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:39,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-01-20 18:12:39,061 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:39,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:39,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1634704890, now seen corresponding path program 79 times [2021-01-20 18:12:39,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:39,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317783002] [2021-01-20 18:12:39,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:39,470 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:39,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317783002] [2021-01-20 18:12:39,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234965686] [2021-01-20 18:12:39,471 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 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 [2021-01-20 18:12:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:39,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-20 18:12:39,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:39,625 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:39,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:39,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-20 18:12:39,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007992850] [2021-01-20 18:12:39,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 18:12:39,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:39,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 18:12:39,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-01-20 18:12:39,652 INFO L87 Difference]: Start difference. First operand 195643 states and 572503 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:43,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:43,048 INFO L93 Difference]: Finished difference Result 197883 states and 579095 transitions. [2021-01-20 18:12:43,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-20 18:12:43,049 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-01-20 18:12:43,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:43,050 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=698, Invalid=1852, Unknown=0, NotChecked=0, Total=2550 [2021-01-20 18:12:43,051 INFO L78 Accepts]: Start accepts. Automaton has 197883 states and 579095 transitions. Word has length 91 [2021-01-20 18:12:43,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:43,051 INFO L481 AbstractCegarLoop]: Abstraction has 197883 states and 579095 transitions. [2021-01-20 18:12:43,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:43,052 INFO L276 IsEmpty]: Start isEmpty. Operand 197883 states and 579095 transitions. [2021-01-20 18:12:43,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-20 18:12:43,457 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:43,457 INFO L504 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:43,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:12:43,674 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:43,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:43,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1956342582, now seen corresponding path program 80 times [2021-01-20 18:12:43,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:43,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024434346] [2021-01-20 18:12:43,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:44,062 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:44,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024434346] [2021-01-20 18:12:44,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860196726] [2021-01-20 18:12:44,063 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 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 [2021-01-20 18:12:44,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:12:44,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:12:44,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-20 18:12:44,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:44,196 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:12:44,251 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:44,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:44,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-01-20 18:12:44,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909905977] [2021-01-20 18:12:44,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 18:12:44,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:44,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 18:12:44,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-01-20 18:12:44,290 INFO L87 Difference]: Start difference. First operand 197883 states and 579095 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:47,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:47,677 INFO L93 Difference]: Finished difference Result 201595 states and 589975 transitions. [2021-01-20 18:12:47,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-20 18:12:47,678 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-01-20 18:12:47,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:47,679 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=787, Invalid=2075, Unknown=0, NotChecked=0, Total=2862 [2021-01-20 18:12:47,679 INFO L78 Accepts]: Start accepts. Automaton has 201595 states and 589975 transitions. Word has length 91 [2021-01-20 18:12:47,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:47,679 INFO L481 AbstractCegarLoop]: Abstraction has 201595 states and 589975 transitions. [2021-01-20 18:12:47,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:47,679 INFO L276 IsEmpty]: Start isEmpty. Operand 201595 states and 589975 transitions. [2021-01-20 18:12:47,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-20 18:12:47,986 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:47,986 INFO L504 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:48,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:12:48,201 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:48,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:48,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1071498888, now seen corresponding path program 81 times [2021-01-20 18:12:48,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:48,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117346857] [2021-01-20 18:12:48,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:48,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117346857] [2021-01-20 18:12:48,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408494766] [2021-01-20 18:12:48,509 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 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 [2021-01-20 18:12:48,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-20 18:12:48,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:12:48,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-20 18:12:48,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:48,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:48,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:48,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-20 18:12:48,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30963891] [2021-01-20 18:12:48,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 18:12:48,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:48,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 18:12:48,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-01-20 18:12:48,777 INFO L87 Difference]: Start difference. First operand 201595 states and 589975 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:51,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:51,719 INFO L93 Difference]: Finished difference Result 203835 states and 596567 transitions. [2021-01-20 18:12:51,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 18:12:51,720 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-01-20 18:12:51,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:51,720 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=792, Invalid=2070, Unknown=0, NotChecked=0, Total=2862 [2021-01-20 18:12:51,721 INFO L78 Accepts]: Start accepts. Automaton has 203835 states and 596567 transitions. Word has length 91 [2021-01-20 18:12:51,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:51,721 INFO L481 AbstractCegarLoop]: Abstraction has 203835 states and 596567 transitions. [2021-01-20 18:12:51,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:51,721 INFO L276 IsEmpty]: Start isEmpty. Operand 203835 states and 596567 transitions. [2021-01-20 18:12:52,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-20 18:12:52,008 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:52,008 INFO L504 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:52,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:12:52,223 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:52,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:52,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1664715704, now seen corresponding path program 82 times [2021-01-20 18:12:52,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:52,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162142926] [2021-01-20 18:12:52,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:52,934 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:52,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162142926] [2021-01-20 18:12:52,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793183733] [2021-01-20 18:12:52,935 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 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 [2021-01-20 18:12:53,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:12:53,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:12:53,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-20 18:12:53,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:53,361 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:12:53,541 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:53,560 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:53,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:53,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-01-20 18:12:53,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587440323] [2021-01-20 18:12:53,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 18:12:53,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:53,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 18:12:53,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-01-20 18:12:53,569 INFO L87 Difference]: Start difference. First operand 203835 states and 596567 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:55,615 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-01-20 18:12:56,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:56,673 INFO L93 Difference]: Finished difference Result 205819 states and 602391 transitions. [2021-01-20 18:12:56,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-20 18:12:56,674 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-01-20 18:12:56,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:56,675 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=824, Invalid=2256, Unknown=0, NotChecked=0, Total=3080 [2021-01-20 18:12:56,675 INFO L78 Accepts]: Start accepts. Automaton has 205819 states and 602391 transitions. Word has length 91 [2021-01-20 18:12:56,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:56,675 INFO L481 AbstractCegarLoop]: Abstraction has 205819 states and 602391 transitions. [2021-01-20 18:12:56,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:56,675 INFO L276 IsEmpty]: Start isEmpty. Operand 205819 states and 602391 transitions. [2021-01-20 18:12:56,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-20 18:12:56,915 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:56,915 INFO L504 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:57,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:12:57,129 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:57,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:57,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1837401482, now seen corresponding path program 83 times [2021-01-20 18:12:57,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:57,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275113529] [2021-01-20 18:12:57,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:57,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275113529] [2021-01-20 18:12:57,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184501270] [2021-01-20 18:12:57,369 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 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 [2021-01-20 18:12:57,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-20 18:12:57,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:12:57,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-20 18:12:57,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:57,479 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:57,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:57,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-20 18:12:57,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288456194] [2021-01-20 18:12:57,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 18:12:57,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:57,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 18:12:57,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-01-20 18:12:57,495 INFO L87 Difference]: Start difference. First operand 205819 states and 602391 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:00,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:13:00,544 INFO L93 Difference]: Finished difference Result 207931 states and 608599 transitions. [2021-01-20 18:13:00,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-20 18:13:00,544 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-01-20 18:13:00,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:13:00,545 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=849, Invalid=2231, Unknown=0, NotChecked=0, Total=3080 [2021-01-20 18:13:00,545 INFO L78 Accepts]: Start accepts. Automaton has 207931 states and 608599 transitions. Word has length 91 [2021-01-20 18:13:00,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:13:00,545 INFO L481 AbstractCegarLoop]: Abstraction has 207931 states and 608599 transitions. [2021-01-20 18:13:00,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:00,546 INFO L276 IsEmpty]: Start isEmpty. Operand 207931 states and 608599 transitions. [2021-01-20 18:13:00,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-20 18:13:00,772 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:13:00,772 INFO L504 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:13:00,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:13:00,985 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:13:00,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:13:00,986 INFO L82 PathProgramCache]: Analyzing trace with hash 324270406, now seen corresponding path program 84 times [2021-01-20 18:13:00,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:13:00,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304523832] [2021-01-20 18:13:00,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:13:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:13:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:01,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304523832] [2021-01-20 18:13:01,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959462550] [2021-01-20 18:13:01,241 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 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 [2021-01-20 18:13:01,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-20 18:13:01,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:13:01,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-20 18:13:01,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:13:01,925 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-01-20 18:13:01,927 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:13:01,971 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:13:01,987 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:01,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:13:01,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-01-20 18:13:01,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105545065] [2021-01-20 18:13:01,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 18:13:01,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:13:01,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 18:13:01,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-01-20 18:13:01,989 INFO L87 Difference]: Start difference. First operand 207931 states and 608599 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:05,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:13:05,325 INFO L93 Difference]: Finished difference Result 209787 states and 614039 transitions. [2021-01-20 18:13:05,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-20 18:13:05,325 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-01-20 18:13:05,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:13:05,326 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=881, Invalid=2425, Unknown=0, NotChecked=0, Total=3306 [2021-01-20 18:13:05,326 INFO L78 Accepts]: Start accepts. Automaton has 209787 states and 614039 transitions. Word has length 91 [2021-01-20 18:13:05,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:13:05,327 INFO L481 AbstractCegarLoop]: Abstraction has 209787 states and 614039 transitions. [2021-01-20 18:13:05,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:05,327 INFO L276 IsEmpty]: Start isEmpty. Operand 209787 states and 614039 transitions. [2021-01-20 18:13:05,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-20 18:13:05,557 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:13:05,557 INFO L504 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:13:05,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:13:05,771 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:13:05,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:13:05,772 INFO L82 PathProgramCache]: Analyzing trace with hash -2080096012, now seen corresponding path program 85 times [2021-01-20 18:13:05,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:13:05,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147351611] [2021-01-20 18:13:05,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:13:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:13:06,879 WARN L193 SmtUtils]: Spent 884.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2021-01-20 18:13:07,352 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 7