/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 13:33:59,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 13:33:59,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 13:33:59,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 13:33:59,503 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 13:33:59,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 13:33:59,515 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 13:33:59,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 13:33:59,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 13:33:59,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 13:33:59,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 13:33:59,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 13:33:59,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 13:33:59,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 13:33:59,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 13:33:59,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 13:33:59,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 13:33:59,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 13:33:59,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 13:33:59,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 13:33:59,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 13:33:59,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 13:33:59,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 13:33:59,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 13:33:59,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 13:33:59,567 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 13:33:59,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 13:33:59,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 13:33:59,568 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 13:33:59,569 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 13:33:59,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 13:33:59,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 13:33:59,575 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 13:33:59,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 13:33:59,576 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 13:33:59,576 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 13:33:59,577 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 13:33:59,577 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 13:33:59,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 13:33:59,578 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 13:33:59,579 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 13:33:59,580 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-09 13:33:59,602 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 13:33:59,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 13:33:59,604 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 13:33:59,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 13:33:59,604 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 13:33:59,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 13:33:59,605 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 13:33:59,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 13:33:59,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 13:33:59,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 13:33:59,605 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 13:33:59,605 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 13:33:59,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 13:33:59,606 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 13:33:59,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 13:33:59,606 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 13:33:59,606 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 13:33:59,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 13:33:59,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 13:33:59,607 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 13:33:59,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 13:33:59,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 13:33:59,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 13:33:59,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 13:33:59,608 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 13:33:59,608 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-09 13:33:59,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 13:33:59,608 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-09 13:33:59,609 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-09 13:33:59,609 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 13:33:59,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 13:33:59,912 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 13:33:59,916 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 13:33:59,918 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 13:33:59,921 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 13:33:59,922 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-10-09 13:33:59,984 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4101be01/205a255954c9458b8e9880cd00187d27/FLAG6108238a9 [2020-10-09 13:34:00,565 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 13:34:00,566 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-10-09 13:34:00,589 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4101be01/205a255954c9458b8e9880cd00187d27/FLAG6108238a9 [2020-10-09 13:34:00,828 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4101be01/205a255954c9458b8e9880cd00187d27 [2020-10-09 13:34:00,839 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 13:34:00,841 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 13:34:00,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 13:34:00,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 13:34:00,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 13:34:00,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 01:34:00" (1/1) ... [2020-10-09 13:34:00,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e282bbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 01:34:00, skipping insertion in model container [2020-10-09 13:34:00,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 01:34:00" (1/1) ... [2020-10-09 13:34:00,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 13:34:00,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 13:34:01,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 13:34:01,637 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 13:34:01,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 13:34:01,990 INFO L208 MainTranslator]: Completed translation [2020-10-09 13:34:01,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 01:34:01 WrapperNode [2020-10-09 13:34:01,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 13:34:01,993 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 13:34:01,993 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 13:34:01,993 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 13:34:02,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 01:34:01" (1/1) ... [2020-10-09 13:34:02,052 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 01:34:01" (1/1) ... [2020-10-09 13:34:02,092 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 13:34:02,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 13:34:02,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 13:34:02,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 13:34:02,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 01:34:01" (1/1) ... [2020-10-09 13:34:02,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 01:34:01" (1/1) ... [2020-10-09 13:34:02,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 01:34:01" (1/1) ... [2020-10-09 13:34:02,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 01:34:01" (1/1) ... [2020-10-09 13:34:02,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 01:34:01" (1/1) ... [2020-10-09 13:34:02,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 01:34:01" (1/1) ... [2020-10-09 13:34:02,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 01:34:01" (1/1) ... [2020-10-09 13:34:02,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 13:34:02,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 13:34:02,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 13:34:02,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 13:34:02,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 01:34:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 13:34:02,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 13:34:02,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 13:34:02,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-09 13:34:02,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 13:34:02,197 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-10-09 13:34:02,197 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2020-10-09 13:34:02,197 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2020-10-09 13:34:02,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-09 13:34:02,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 13:34:02,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 13:34:02,200 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-09 13:34:02,595 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 13:34:02,595 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-09 13:34:02,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 01:34:02 BoogieIcfgContainer [2020-10-09 13:34:02,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 13:34:02,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 13:34:02,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 13:34:02,603 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 13:34:02,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 01:34:00" (1/3) ... [2020-10-09 13:34:02,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed1ab36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 01:34:02, skipping insertion in model container [2020-10-09 13:34:02,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 01:34:01" (2/3) ... [2020-10-09 13:34:02,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed1ab36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 01:34:02, skipping insertion in model container [2020-10-09 13:34:02,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 01:34:02" (3/3) ... [2020-10-09 13:34:02,607 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2020-10-09 13:34:02,619 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-09 13:34:02,619 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 13:34:02,627 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 13:34:02,628 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 13:34:02,652 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,653 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,653 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,653 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,653 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,654 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,654 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,654 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,654 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,655 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,655 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,655 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,655 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,656 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,656 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,656 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,656 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,657 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,657 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,657 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,658 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,658 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,658 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,662 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,662 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,663 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,663 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,663 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,663 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,664 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,664 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,667 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:34:02,702 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-09 13:34:02,721 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 13:34:02,721 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-09 13:34:02,721 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 13:34:02,721 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 13:34:02,721 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 13:34:02,721 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 13:34:02,722 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 13:34:02,722 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 13:34:02,734 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-09 13:34:02,737 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 81 transitions, 170 flow [2020-10-09 13:34:02,739 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 78 places, 81 transitions, 170 flow [2020-10-09 13:34:02,741 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-10-09 13:34:02,811 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-10-09 13:34:02,811 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-09 13:34:02,817 INFO L80 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 7/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-10-09 13:34:02,820 INFO L117 LiptonReduction]: Number of co-enabled transitions 646 [2020-10-09 13:34:04,767 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-10-09 13:34:04,937 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-09 13:34:05,571 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2020-10-09 13:34:05,830 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-09 13:34:05,839 INFO L132 LiptonReduction]: Checked pairs total: 823 [2020-10-09 13:34:05,839 INFO L134 LiptonReduction]: Total number of compositions: 75 [2020-10-09 13:34:05,846 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 19 places, 17 transitions, 42 flow [2020-10-09 13:34:05,857 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2020-10-09 13:34:05,860 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-09 13:34:05,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-09 13:34:05,867 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:05,868 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:05,868 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:05,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:05,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1717538151, now seen corresponding path program 1 times [2020-10-09 13:34:05,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:05,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880184803] [2020-10-09 13:34:05,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:06,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:34:06,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880184803] [2020-10-09 13:34:06,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 13:34:06,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-09 13:34:06,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924884657] [2020-10-09 13:34:06,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-09 13:34:06,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:06,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-09 13:34:06,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-09 13:34:06,230 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-09 13:34:06,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:06,298 INFO L93 Difference]: Finished difference Result 52 states and 100 transitions. [2020-10-09 13:34:06,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 13:34:06,301 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-10-09 13:34:06,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:06,318 INFO L225 Difference]: With dead ends: 52 [2020-10-09 13:34:06,318 INFO L226 Difference]: Without dead ends: 52 [2020-10-09 13:34:06,319 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-09 13:34:06,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-09 13:34:06,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-09 13:34:06,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-09 13:34:06,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2020-10-09 13:34:06,379 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 8 [2020-10-09 13:34:06,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:06,380 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2020-10-09 13:34:06,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-09 13:34:06,380 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2020-10-09 13:34:06,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 13:34:06,382 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:06,382 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:06,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-09 13:34:06,383 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:06,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:06,383 INFO L82 PathProgramCache]: Analyzing trace with hash 62706239, now seen corresponding path program 1 times [2020-10-09 13:34:06,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:06,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719803998] [2020-10-09 13:34:06,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:06,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:34:06,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719803998] [2020-10-09 13:34:06,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 13:34:06,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-09 13:34:06,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967522152] [2020-10-09 13:34:06,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-09 13:34:06,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:06,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-09 13:34:06,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-09 13:34:06,530 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand 3 states. [2020-10-09 13:34:06,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:06,552 INFO L93 Difference]: Finished difference Result 64 states and 124 transitions. [2020-10-09 13:34:06,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 13:34:06,553 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-09 13:34:06,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:06,554 INFO L225 Difference]: With dead ends: 64 [2020-10-09 13:34:06,554 INFO L226 Difference]: Without dead ends: 64 [2020-10-09 13:34:06,555 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-09 13:34:06,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-09 13:34:06,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2020-10-09 13:34:06,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-09 13:34:06,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 88 transitions. [2020-10-09 13:34:06,563 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 88 transitions. Word has length 11 [2020-10-09 13:34:06,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:06,563 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 88 transitions. [2020-10-09 13:34:06,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-09 13:34:06,564 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 88 transitions. [2020-10-09 13:34:06,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 13:34:06,565 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:06,565 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:06,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-09 13:34:06,565 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:06,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:06,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1954756591, now seen corresponding path program 1 times [2020-10-09 13:34:06,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:06,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366528053] [2020-10-09 13:34:06,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:06,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:34:06,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366528053] [2020-10-09 13:34:06,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401600289] [2020-10-09 13:34:06,618 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 [2020-10-09 13:34:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:06,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-09 13:34:06,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:06,752 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-09 13:34:06,753 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-09 13:34:06,764 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-09 13:34:06,764 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-09 13:34:06,765 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-10-09 13:34:06,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:34:06,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-09 13:34:06,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-10-09 13:34:06,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154173505] [2020-10-09 13:34:06,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-09 13:34:06,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:06,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-09 13:34:06,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-09 13:34:06,782 INFO L87 Difference]: Start difference. First operand 46 states and 88 transitions. Second operand 3 states. [2020-10-09 13:34:06,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:06,805 INFO L93 Difference]: Finished difference Result 40 states and 66 transitions. [2020-10-09 13:34:06,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 13:34:06,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-09 13:34:06,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:06,807 INFO L225 Difference]: With dead ends: 40 [2020-10-09 13:34:06,807 INFO L226 Difference]: Without dead ends: 40 [2020-10-09 13:34:06,808 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-09 13:34:06,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-09 13:34:06,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-09 13:34:06,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-09 13:34:06,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 66 transitions. [2020-10-09 13:34:06,814 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 66 transitions. Word has length 15 [2020-10-09 13:34:06,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:06,832 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 66 transitions. [2020-10-09 13:34:06,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-09 13:34:06,832 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 66 transitions. [2020-10-09 13:34:06,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 13:34:06,833 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:06,834 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:07,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-09 13:34:07,049 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:07,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:07,049 INFO L82 PathProgramCache]: Analyzing trace with hash 525517821, now seen corresponding path program 2 times [2020-10-09 13:34:07,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:07,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303321069] [2020-10-09 13:34:07,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:07,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:34:07,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303321069] [2020-10-09 13:34:07,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831299203] [2020-10-09 13:34:07,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:07,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 13:34:07,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:34:07,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-09 13:34:07,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:34:07,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:07,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-09 13:34:07,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412914722] [2020-10-09 13:34:07,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-09 13:34:07,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:07,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-09 13:34:07,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-09 13:34:07,221 INFO L87 Difference]: Start difference. First operand 40 states and 66 transitions. Second operand 6 states. [2020-10-09 13:34:07,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:07,340 INFO L93 Difference]: Finished difference Result 104 states and 159 transitions. [2020-10-09 13:34:07,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 13:34:07,341 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-09 13:34:07,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:07,343 INFO L225 Difference]: With dead ends: 104 [2020-10-09 13:34:07,343 INFO L226 Difference]: Without dead ends: 104 [2020-10-09 13:34:07,343 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-09 13:34:07,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-09 13:34:07,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 79. [2020-10-09 13:34:07,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-09 13:34:07,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 124 transitions. [2020-10-09 13:34:07,353 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 124 transitions. Word has length 15 [2020-10-09 13:34:07,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:07,353 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 124 transitions. [2020-10-09 13:34:07,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-09 13:34:07,354 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 124 transitions. [2020-10-09 13:34:07,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-09 13:34:07,355 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:07,355 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:07,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:07,563 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:07,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:07,564 INFO L82 PathProgramCache]: Analyzing trace with hash 485096059, now seen corresponding path program 3 times [2020-10-09 13:34:07,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:07,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726270070] [2020-10-09 13:34:07,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:07,687 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-09 13:34:07,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726270070] [2020-10-09 13:34:07,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188710458] [2020-10-09 13:34:07,689 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:07,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 13:34:07,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:34:07,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 13:34:07,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:07,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-09 13:34:07,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:07,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-09 13:34:07,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341834222] [2020-10-09 13:34:07,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-09 13:34:07,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:07,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-09 13:34:07,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-09 13:34:07,789 INFO L87 Difference]: Start difference. First operand 79 states and 124 transitions. Second operand 6 states. [2020-10-09 13:34:07,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:07,826 INFO L93 Difference]: Finished difference Result 110 states and 168 transitions. [2020-10-09 13:34:07,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-09 13:34:07,826 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-09 13:34:07,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:07,828 INFO L225 Difference]: With dead ends: 110 [2020-10-09 13:34:07,828 INFO L226 Difference]: Without dead ends: 110 [2020-10-09 13:34:07,828 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-09 13:34:07,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-09 13:34:07,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2020-10-09 13:34:07,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-09 13:34:07,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 154 transitions. [2020-10-09 13:34:07,838 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 154 transitions. Word has length 22 [2020-10-09 13:34:07,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:07,839 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 154 transitions. [2020-10-09 13:34:07,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-09 13:34:07,839 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 154 transitions. [2020-10-09 13:34:07,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-09 13:34:07,841 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:07,841 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:08,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:08,056 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:08,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:08,057 INFO L82 PathProgramCache]: Analyzing trace with hash -2041399383, now seen corresponding path program 4 times [2020-10-09 13:34:08,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:08,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659456025] [2020-10-09 13:34:08,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:08,109 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-09 13:34:08,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659456025] [2020-10-09 13:34:08,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355965784] [2020-10-09 13:34:08,110 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:08,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 13:34:08,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:34:08,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 13:34:08,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-09 13:34:08,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:08,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-09 13:34:08,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353091711] [2020-10-09 13:34:08,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-09 13:34:08,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:08,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-09 13:34:08,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-09 13:34:08,216 INFO L87 Difference]: Start difference. First operand 100 states and 154 transitions. Second operand 6 states. [2020-10-09 13:34:08,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:08,243 INFO L93 Difference]: Finished difference Result 148 states and 220 transitions. [2020-10-09 13:34:08,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-09 13:34:08,244 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-09 13:34:08,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:08,245 INFO L225 Difference]: With dead ends: 148 [2020-10-09 13:34:08,246 INFO L226 Difference]: Without dead ends: 148 [2020-10-09 13:34:08,246 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-09 13:34:08,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-09 13:34:08,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 130. [2020-10-09 13:34:08,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-09 13:34:08,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 196 transitions. [2020-10-09 13:34:08,257 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 196 transitions. Word has length 25 [2020-10-09 13:34:08,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:08,258 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 196 transitions. [2020-10-09 13:34:08,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-09 13:34:08,258 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 196 transitions. [2020-10-09 13:34:08,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-09 13:34:08,260 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:08,260 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:08,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:08,475 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:08,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:08,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1548321815, now seen corresponding path program 5 times [2020-10-09 13:34:08,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:08,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467894634] [2020-10-09 13:34:08,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-09 13:34:08,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467894634] [2020-10-09 13:34:08,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063348447] [2020-10-09 13:34:08,535 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:08,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-09 13:34:08,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:34:08,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-09 13:34:08,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:08,630 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-09 13:34:08,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:08,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-09 13:34:08,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945798067] [2020-10-09 13:34:08,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-09 13:34:08,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:08,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-09 13:34:08,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-09 13:34:08,633 INFO L87 Difference]: Start difference. First operand 130 states and 196 transitions. Second operand 7 states. [2020-10-09 13:34:08,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:08,660 INFO L93 Difference]: Finished difference Result 178 states and 262 transitions. [2020-10-09 13:34:08,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-09 13:34:08,661 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-09 13:34:08,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:08,662 INFO L225 Difference]: With dead ends: 178 [2020-10-09 13:34:08,662 INFO L226 Difference]: Without dead ends: 178 [2020-10-09 13:34:08,662 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-09 13:34:08,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-09 13:34:08,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 160. [2020-10-09 13:34:08,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-09 13:34:08,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 238 transitions. [2020-10-09 13:34:08,677 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 238 transitions. Word has length 29 [2020-10-09 13:34:08,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:08,677 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 238 transitions. [2020-10-09 13:34:08,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-09 13:34:08,677 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 238 transitions. [2020-10-09 13:34:08,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 13:34:08,680 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:08,680 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:08,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-09 13:34:08,895 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:08,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:08,896 INFO L82 PathProgramCache]: Analyzing trace with hash -2012714619, now seen corresponding path program 6 times [2020-10-09 13:34:08,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:08,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934265368] [2020-10-09 13:34:08,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-09 13:34:09,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934265368] [2020-10-09 13:34:09,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160290414] [2020-10-09 13:34:09,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:09,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-09 13:34:09,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:34:09,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-09 13:34:09,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:09,184 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-09 13:34:09,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:09,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-10-09 13:34:09,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907906524] [2020-10-09 13:34:09,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 13:34:09,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:09,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 13:34:09,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-09 13:34:09,186 INFO L87 Difference]: Start difference. First operand 160 states and 238 transitions. Second operand 11 states. [2020-10-09 13:34:09,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:09,656 INFO L93 Difference]: Finished difference Result 266 states and 378 transitions. [2020-10-09 13:34:09,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 13:34:09,658 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-09 13:34:09,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:09,660 INFO L225 Difference]: With dead ends: 266 [2020-10-09 13:34:09,660 INFO L226 Difference]: Without dead ends: 266 [2020-10-09 13:34:09,661 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2020-10-09 13:34:09,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-09 13:34:09,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 229. [2020-10-09 13:34:09,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-09 13:34:09,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 331 transitions. [2020-10-09 13:34:09,681 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 331 transitions. Word has length 33 [2020-10-09 13:34:09,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:09,681 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 331 transitions. [2020-10-09 13:34:09,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 13:34:09,682 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 331 transitions. [2020-10-09 13:34:09,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-09 13:34:09,684 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:09,684 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:09,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:09,898 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:09,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:09,899 INFO L82 PathProgramCache]: Analyzing trace with hash -480954575, now seen corresponding path program 7 times [2020-10-09 13:34:09,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:09,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269005252] [2020-10-09 13:34:09,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:09,992 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-09 13:34:09,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269005252] [2020-10-09 13:34:09,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163697504] [2020-10-09 13:34:09,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:10,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:10,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 13:34:10,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:10,100 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-09 13:34:10,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:10,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-09 13:34:10,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798752923] [2020-10-09 13:34:10,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 13:34:10,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:10,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 13:34:10,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-09 13:34:10,102 INFO L87 Difference]: Start difference. First operand 229 states and 331 transitions. Second operand 9 states. [2020-10-09 13:34:10,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:10,151 INFO L93 Difference]: Finished difference Result 286 states and 407 transitions. [2020-10-09 13:34:10,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 13:34:10,151 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-10-09 13:34:10,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:10,153 INFO L225 Difference]: With dead ends: 286 [2020-10-09 13:34:10,153 INFO L226 Difference]: Without dead ends: 286 [2020-10-09 13:34:10,153 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-09 13:34:10,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-09 13:34:10,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 265. [2020-10-09 13:34:10,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-09 13:34:10,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 380 transitions. [2020-10-09 13:34:10,162 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 380 transitions. Word has length 40 [2020-10-09 13:34:10,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:10,162 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 380 transitions. [2020-10-09 13:34:10,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 13:34:10,163 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 380 transitions. [2020-10-09 13:34:10,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-09 13:34:10,165 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:10,165 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:10,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:10,380 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:10,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:10,381 INFO L82 PathProgramCache]: Analyzing trace with hash -870694653, now seen corresponding path program 8 times [2020-10-09 13:34:10,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:10,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85240754] [2020-10-09 13:34:10,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:10,466 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-09 13:34:10,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85240754] [2020-10-09 13:34:10,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991136946] [2020-10-09 13:34:10,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:10,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 13:34:10,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:34:10,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 13:34:10,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:10,579 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-09 13:34:10,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:10,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-09 13:34:10,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665578254] [2020-10-09 13:34:10,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 13:34:10,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:10,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 13:34:10,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-09 13:34:10,582 INFO L87 Difference]: Start difference. First operand 265 states and 380 transitions. Second operand 10 states. [2020-10-09 13:34:10,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:10,624 INFO L93 Difference]: Finished difference Result 322 states and 456 transitions. [2020-10-09 13:34:10,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 13:34:10,625 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-09 13:34:10,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:10,627 INFO L225 Difference]: With dead ends: 322 [2020-10-09 13:34:10,628 INFO L226 Difference]: Without dead ends: 322 [2020-10-09 13:34:10,628 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-09 13:34:10,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-09 13:34:10,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 301. [2020-10-09 13:34:10,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-10-09 13:34:10,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 429 transitions. [2020-10-09 13:34:10,639 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 429 transitions. Word has length 44 [2020-10-09 13:34:10,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:10,639 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 429 transitions. [2020-10-09 13:34:10,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 13:34:10,639 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 429 transitions. [2020-10-09 13:34:10,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-09 13:34:10,641 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:10,641 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:10,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-09 13:34:10,855 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:10,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:10,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1422004693, now seen corresponding path program 9 times [2020-10-09 13:34:10,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:10,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227501253] [2020-10-09 13:34:10,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 91 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-09 13:34:10,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227501253] [2020-10-09 13:34:10,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292514300] [2020-10-09 13:34:10,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:11,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-09 13:34:11,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:34:11,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 13:34:11,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:11,133 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-10-09 13:34:11,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:11,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2020-10-09 13:34:11,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059841859] [2020-10-09 13:34:11,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 13:34:11,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:11,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 13:34:11,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-09 13:34:11,135 INFO L87 Difference]: Start difference. First operand 301 states and 429 transitions. Second operand 15 states. [2020-10-09 13:34:12,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:12,112 INFO L93 Difference]: Finished difference Result 440 states and 606 transitions. [2020-10-09 13:34:12,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-09 13:34:12,113 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-10-09 13:34:12,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:12,116 INFO L225 Difference]: With dead ends: 440 [2020-10-09 13:34:12,116 INFO L226 Difference]: Without dead ends: 440 [2020-10-09 13:34:12,117 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=945, Invalid=2025, Unknown=0, NotChecked=0, Total=2970 [2020-10-09 13:34:12,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-10-09 13:34:12,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 394. [2020-10-09 13:34:12,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-10-09 13:34:12,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 550 transitions. [2020-10-09 13:34:12,127 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 550 transitions. Word has length 48 [2020-10-09 13:34:12,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:12,128 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 550 transitions. [2020-10-09 13:34:12,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 13:34:12,128 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 550 transitions. [2020-10-09 13:34:12,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-09 13:34:12,130 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:12,130 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:12,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:12,345 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:12,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:12,346 INFO L82 PathProgramCache]: Analyzing trace with hash 314386685, now seen corresponding path program 10 times [2020-10-09 13:34:12,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:12,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909045505] [2020-10-09 13:34:12,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:12,463 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 13 proven. 120 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-09 13:34:12,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909045505] [2020-10-09 13:34:12,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206079914] [2020-10-09 13:34:12,464 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:12,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 13:34:12,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:34:12,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 13:34:12,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:12,688 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 13 proven. 120 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-09 13:34:12,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:12,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-09 13:34:12,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958845469] [2020-10-09 13:34:12,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-09 13:34:12,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:12,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-09 13:34:12,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-09 13:34:12,691 INFO L87 Difference]: Start difference. First operand 394 states and 550 transitions. Second operand 12 states. [2020-10-09 13:34:12,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:12,744 INFO L93 Difference]: Finished difference Result 460 states and 636 transitions. [2020-10-09 13:34:12,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 13:34:12,745 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-10-09 13:34:12,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:12,747 INFO L225 Difference]: With dead ends: 460 [2020-10-09 13:34:12,748 INFO L226 Difference]: Without dead ends: 460 [2020-10-09 13:34:12,748 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-09 13:34:12,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-09 13:34:12,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 436. [2020-10-09 13:34:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2020-10-09 13:34:12,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 606 transitions. [2020-10-09 13:34:12,760 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 606 transitions. Word has length 55 [2020-10-09 13:34:12,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:12,760 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 606 transitions. [2020-10-09 13:34:12,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-09 13:34:12,760 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 606 transitions. [2020-10-09 13:34:12,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-09 13:34:12,763 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:12,763 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:12,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:12,979 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:12,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:12,979 INFO L82 PathProgramCache]: Analyzing trace with hash 298647787, now seen corresponding path program 11 times [2020-10-09 13:34:12,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:12,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982640028] [2020-10-09 13:34:12,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:13,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:13,101 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 13 proven. 153 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-09 13:34:13,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982640028] [2020-10-09 13:34:13,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602986494] [2020-10-09 13:34:13,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:13,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-09 13:34:13,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:34:13,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 13:34:13,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:13,260 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 13 proven. 153 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-09 13:34:13,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:13,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-09 13:34:13,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150549644] [2020-10-09 13:34:13,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 13:34:13,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:13,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 13:34:13,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-09 13:34:13,269 INFO L87 Difference]: Start difference. First operand 436 states and 606 transitions. Second operand 13 states. [2020-10-09 13:34:13,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:13,322 INFO L93 Difference]: Finished difference Result 502 states and 692 transitions. [2020-10-09 13:34:13,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 13:34:13,323 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-10-09 13:34:13,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:13,327 INFO L225 Difference]: With dead ends: 502 [2020-10-09 13:34:13,327 INFO L226 Difference]: Without dead ends: 502 [2020-10-09 13:34:13,328 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-09 13:34:13,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-10-09 13:34:13,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 478. [2020-10-09 13:34:13,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 478 states. [2020-10-09 13:34:13,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 662 transitions. [2020-10-09 13:34:13,339 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 662 transitions. Word has length 59 [2020-10-09 13:34:13,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:13,341 INFO L481 AbstractCegarLoop]: Abstraction has 478 states and 662 transitions. [2020-10-09 13:34:13,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 13:34:13,341 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 662 transitions. [2020-10-09 13:34:13,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-09 13:34:13,343 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:13,343 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:13,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-09 13:34:13,556 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:13,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:13,557 INFO L82 PathProgramCache]: Analyzing trace with hash -734842407, now seen corresponding path program 12 times [2020-10-09 13:34:13,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:13,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658262307] [2020-10-09 13:34:13,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 13 proven. 190 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-09 13:34:13,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658262307] [2020-10-09 13:34:13,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215563311] [2020-10-09 13:34:13,713 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:13,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-09 13:34:13,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:34:13,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 13:34:13,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:13,987 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-10-09 13:34:13,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:13,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2020-10-09 13:34:13,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259086371] [2020-10-09 13:34:13,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 13:34:13,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:13,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 13:34:13,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-10-09 13:34:13,991 INFO L87 Difference]: Start difference. First operand 478 states and 662 transitions. Second operand 19 states. [2020-10-09 13:34:15,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:15,842 INFO L93 Difference]: Finished difference Result 650 states and 876 transitions. [2020-10-09 13:34:15,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-10-09 13:34:15,843 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 63 [2020-10-09 13:34:15,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:15,846 INFO L225 Difference]: With dead ends: 650 [2020-10-09 13:34:15,846 INFO L226 Difference]: Without dead ends: 650 [2020-10-09 13:34:15,849 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2205 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2184, Invalid=4956, Unknown=0, NotChecked=0, Total=7140 [2020-10-09 13:34:15,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2020-10-09 13:34:15,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 595. [2020-10-09 13:34:15,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2020-10-09 13:34:15,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 811 transitions. [2020-10-09 13:34:15,862 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 811 transitions. Word has length 63 [2020-10-09 13:34:15,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:15,862 INFO L481 AbstractCegarLoop]: Abstraction has 595 states and 811 transitions. [2020-10-09 13:34:15,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 13:34:15,862 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 811 transitions. [2020-10-09 13:34:15,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-09 13:34:15,864 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:15,865 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:16,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-09 13:34:16,079 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:16,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:16,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1647338205, now seen corresponding path program 13 times [2020-10-09 13:34:16,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:16,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155259201] [2020-10-09 13:34:16,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 16 proven. 231 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-09 13:34:16,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155259201] [2020-10-09 13:34:16,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310629207] [2020-10-09 13:34:16,211 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:16,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 13:34:16,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 16 proven. 231 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-09 13:34:16,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:16,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-09 13:34:16,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673659901] [2020-10-09 13:34:16,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 13:34:16,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:16,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 13:34:16,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-09 13:34:16,333 INFO L87 Difference]: Start difference. First operand 595 states and 811 transitions. Second operand 15 states. [2020-10-09 13:34:16,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:16,393 INFO L93 Difference]: Finished difference Result 670 states and 907 transitions. [2020-10-09 13:34:16,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 13:34:16,394 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 70 [2020-10-09 13:34:16,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:16,397 INFO L225 Difference]: With dead ends: 670 [2020-10-09 13:34:16,397 INFO L226 Difference]: Without dead ends: 670 [2020-10-09 13:34:16,399 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-09 13:34:16,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-10-09 13:34:16,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 643. [2020-10-09 13:34:16,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-10-09 13:34:16,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 874 transitions. [2020-10-09 13:34:16,416 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 874 transitions. Word has length 70 [2020-10-09 13:34:16,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:16,417 INFO L481 AbstractCegarLoop]: Abstraction has 643 states and 874 transitions. [2020-10-09 13:34:16,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 13:34:16,417 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 874 transitions. [2020-10-09 13:34:16,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-09 13:34:16,419 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:16,419 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:16,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-09 13:34:16,633 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:16,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:16,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1171001041, now seen corresponding path program 14 times [2020-10-09 13:34:16,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:16,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318222582] [2020-10-09 13:34:16,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 16 proven. 276 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-09 13:34:16,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318222582] [2020-10-09 13:34:16,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523950639] [2020-10-09 13:34:16,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:16,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 13:34:16,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:34:16,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-09 13:34:16,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:16,927 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 16 proven. 276 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-09 13:34:16,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:16,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-09 13:34:16,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014185120] [2020-10-09 13:34:16,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 13:34:16,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:16,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 13:34:16,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-09 13:34:16,935 INFO L87 Difference]: Start difference. First operand 643 states and 874 transitions. Second operand 16 states. [2020-10-09 13:34:16,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:16,987 INFO L93 Difference]: Finished difference Result 718 states and 970 transitions. [2020-10-09 13:34:16,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 13:34:16,988 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 74 [2020-10-09 13:34:16,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:16,991 INFO L225 Difference]: With dead ends: 718 [2020-10-09 13:34:16,991 INFO L226 Difference]: Without dead ends: 718 [2020-10-09 13:34:16,992 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-09 13:34:16,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2020-10-09 13:34:17,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 691. [2020-10-09 13:34:17,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2020-10-09 13:34:17,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 937 transitions. [2020-10-09 13:34:17,006 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 937 transitions. Word has length 74 [2020-10-09 13:34:17,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:17,007 INFO L481 AbstractCegarLoop]: Abstraction has 691 states and 937 transitions. [2020-10-09 13:34:17,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 13:34:17,007 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 937 transitions. [2020-10-09 13:34:17,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-09 13:34:17,009 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:17,009 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:17,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:17,219 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:17,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:17,219 INFO L82 PathProgramCache]: Analyzing trace with hash 776210049, now seen corresponding path program 15 times [2020-10-09 13:34:17,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:17,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916307863] [2020-10-09 13:34:17,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 325 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-09 13:34:17,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916307863] [2020-10-09 13:34:17,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277416647] [2020-10-09 13:34:17,405 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:17,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-09 13:34:17,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:34:17,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 13:34:17,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-10-09 13:34:17,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:17,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 23 [2020-10-09 13:34:17,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779607135] [2020-10-09 13:34:17,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 13:34:17,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:17,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 13:34:17,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2020-10-09 13:34:17,640 INFO L87 Difference]: Start difference. First operand 691 states and 937 transitions. Second operand 23 states. [2020-10-09 13:34:21,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:21,098 INFO L93 Difference]: Finished difference Result 896 states and 1188 transitions. [2020-10-09 13:34:21,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-10-09 13:34:21,099 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 78 [2020-10-09 13:34:21,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:21,104 INFO L225 Difference]: With dead ends: 896 [2020-10-09 13:34:21,104 INFO L226 Difference]: Without dead ends: 896 [2020-10-09 13:34:21,109 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4844 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4320, Invalid=10200, Unknown=0, NotChecked=0, Total=14520 [2020-10-09 13:34:21,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2020-10-09 13:34:21,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 832. [2020-10-09 13:34:21,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 832 states. [2020-10-09 13:34:21,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1114 transitions. [2020-10-09 13:34:21,125 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1114 transitions. Word has length 78 [2020-10-09 13:34:21,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:21,125 INFO L481 AbstractCegarLoop]: Abstraction has 832 states and 1114 transitions. [2020-10-09 13:34:21,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 13:34:21,126 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1114 transitions. [2020-10-09 13:34:21,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-09 13:34:21,128 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:21,128 INFO L421 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:21,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-09 13:34:21,342 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:21,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:21,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1559138385, now seen corresponding path program 16 times [2020-10-09 13:34:21,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:21,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342886950] [2020-10-09 13:34:21,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 19 proven. 378 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-09 13:34:21,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342886950] [2020-10-09 13:34:21,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91071739] [2020-10-09 13:34:21,513 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:21,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 13:34:21,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:34:21,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 13:34:21,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:21,775 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 19 proven. 378 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-09 13:34:21,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:21,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-09 13:34:21,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861710307] [2020-10-09 13:34:21,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-09 13:34:21,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:21,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-09 13:34:21,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-09 13:34:21,777 INFO L87 Difference]: Start difference. First operand 832 states and 1114 transitions. Second operand 18 states. [2020-10-09 13:34:21,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:21,847 INFO L93 Difference]: Finished difference Result 916 states and 1220 transitions. [2020-10-09 13:34:21,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 13:34:21,848 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-10-09 13:34:21,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:21,852 INFO L225 Difference]: With dead ends: 916 [2020-10-09 13:34:21,852 INFO L226 Difference]: Without dead ends: 916 [2020-10-09 13:34:21,852 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-09 13:34:21,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2020-10-09 13:34:21,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 886. [2020-10-09 13:34:21,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 886 states. [2020-10-09 13:34:21,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1184 transitions. [2020-10-09 13:34:21,870 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1184 transitions. Word has length 85 [2020-10-09 13:34:21,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:21,871 INFO L481 AbstractCegarLoop]: Abstraction has 886 states and 1184 transitions. [2020-10-09 13:34:21,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-09 13:34:21,871 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1184 transitions. [2020-10-09 13:34:21,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-09 13:34:21,873 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:21,874 INFO L421 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:22,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-09 13:34:22,087 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:22,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:22,088 INFO L82 PathProgramCache]: Analyzing trace with hash -933866561, now seen corresponding path program 17 times [2020-10-09 13:34:22,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:22,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022196832] [2020-10-09 13:34:22,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 19 proven. 435 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-09 13:34:22,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022196832] [2020-10-09 13:34:22,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052177078] [2020-10-09 13:34:22,360 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:22,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-10-09 13:34:22,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:34:22,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-09 13:34:22,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 19 proven. 435 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-09 13:34:22,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:22,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-09 13:34:22,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197993671] [2020-10-09 13:34:22,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 13:34:22,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:22,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 13:34:22,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-09 13:34:22,537 INFO L87 Difference]: Start difference. First operand 886 states and 1184 transitions. Second operand 19 states. [2020-10-09 13:34:22,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:22,608 INFO L93 Difference]: Finished difference Result 970 states and 1290 transitions. [2020-10-09 13:34:22,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 13:34:22,609 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 89 [2020-10-09 13:34:22,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:22,613 INFO L225 Difference]: With dead ends: 970 [2020-10-09 13:34:22,613 INFO L226 Difference]: Without dead ends: 970 [2020-10-09 13:34:22,613 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-09 13:34:22,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-10-09 13:34:22,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 940. [2020-10-09 13:34:22,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 940 states. [2020-10-09 13:34:22,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1254 transitions. [2020-10-09 13:34:22,630 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1254 transitions. Word has length 89 [2020-10-09 13:34:22,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:22,630 INFO L481 AbstractCegarLoop]: Abstraction has 940 states and 1254 transitions. [2020-10-09 13:34:22,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 13:34:22,630 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1254 transitions. [2020-10-09 13:34:22,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-09 13:34:22,633 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:22,633 INFO L421 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:22,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:22,847 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:22,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:22,847 INFO L82 PathProgramCache]: Analyzing trace with hash -365776851, now seen corresponding path program 18 times [2020-10-09 13:34:22,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:22,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886896650] [2020-10-09 13:34:22,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:23,079 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 19 proven. 496 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-09 13:34:23,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886896650] [2020-10-09 13:34:23,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797317762] [2020-10-09 13:34:23,079 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:23,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-10-09 13:34:23,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:34:23,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 13:34:23,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2020-10-09 13:34:23,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:23,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 27 [2020-10-09 13:34:23,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641869393] [2020-10-09 13:34:23,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-09 13:34:23,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:23,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-09 13:34:23,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-09 13:34:23,419 INFO L87 Difference]: Start difference. First operand 940 states and 1254 transitions. Second operand 27 states. [2020-10-09 13:34:29,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:29,039 INFO L93 Difference]: Finished difference Result 1178 states and 1542 transitions. [2020-10-09 13:34:29,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2020-10-09 13:34:29,039 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 93 [2020-10-09 13:34:29,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:29,045 INFO L225 Difference]: With dead ends: 1178 [2020-10-09 13:34:29,046 INFO L226 Difference]: Without dead ends: 1178 [2020-10-09 13:34:29,052 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9308 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=7695, Invalid=18711, Unknown=0, NotChecked=0, Total=26406 [2020-10-09 13:34:29,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2020-10-09 13:34:29,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1105. [2020-10-09 13:34:29,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1105 states. [2020-10-09 13:34:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1459 transitions. [2020-10-09 13:34:29,068 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1459 transitions. Word has length 93 [2020-10-09 13:34:29,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:29,069 INFO L481 AbstractCegarLoop]: Abstraction has 1105 states and 1459 transitions. [2020-10-09 13:34:29,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-09 13:34:29,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1459 transitions. [2020-10-09 13:34:29,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-09 13:34:29,072 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:29,072 INFO L421 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:29,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:29,287 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:29,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:29,287 INFO L82 PathProgramCache]: Analyzing trace with hash -2077738871, now seen corresponding path program 19 times [2020-10-09 13:34:29,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:29,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338350102] [2020-10-09 13:34:29,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:29,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:29,614 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 22 proven. 561 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-09 13:34:29,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338350102] [2020-10-09 13:34:29,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517016270] [2020-10-09 13:34:29,616 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:29,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-09 13:34:29,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:29,882 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 22 proven. 561 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-09 13:34:29,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:29,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-09 13:34:29,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973324463] [2020-10-09 13:34:29,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-09 13:34:29,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:29,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-09 13:34:29,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-09 13:34:29,885 INFO L87 Difference]: Start difference. First operand 1105 states and 1459 transitions. Second operand 21 states. [2020-10-09 13:34:30,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:30,019 INFO L93 Difference]: Finished difference Result 1198 states and 1575 transitions. [2020-10-09 13:34:30,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 13:34:30,020 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 100 [2020-10-09 13:34:30,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:30,027 INFO L225 Difference]: With dead ends: 1198 [2020-10-09 13:34:30,027 INFO L226 Difference]: Without dead ends: 1198 [2020-10-09 13:34:30,028 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-09 13:34:30,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2020-10-09 13:34:30,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1165. [2020-10-09 13:34:30,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1165 states. [2020-10-09 13:34:30,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 1536 transitions. [2020-10-09 13:34:30,055 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 1536 transitions. Word has length 100 [2020-10-09 13:34:30,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:30,055 INFO L481 AbstractCegarLoop]: Abstraction has 1165 states and 1536 transitions. [2020-10-09 13:34:30,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-09 13:34:30,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 1536 transitions. [2020-10-09 13:34:30,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-09 13:34:30,059 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:30,060 INFO L421 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:30,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:30,272 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:30,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:30,273 INFO L82 PathProgramCache]: Analyzing trace with hash 110062427, now seen corresponding path program 20 times [2020-10-09 13:34:30,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:30,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234947241] [2020-10-09 13:34:30,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:30,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 22 proven. 630 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-09 13:34:30,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234947241] [2020-10-09 13:34:30,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881356040] [2020-10-09 13:34:30,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:30,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 13:34:30,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:34:30,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 13:34:30,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:30,845 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 22 proven. 630 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-09 13:34:30,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:30,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-09 13:34:30,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865096581] [2020-10-09 13:34:30,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-09 13:34:30,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:30,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-09 13:34:30,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-09 13:34:30,851 INFO L87 Difference]: Start difference. First operand 1165 states and 1536 transitions. Second operand 22 states. [2020-10-09 13:34:30,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:30,973 INFO L93 Difference]: Finished difference Result 1258 states and 1652 transitions. [2020-10-09 13:34:30,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 13:34:30,974 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 104 [2020-10-09 13:34:30,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:30,981 INFO L225 Difference]: With dead ends: 1258 [2020-10-09 13:34:30,981 INFO L226 Difference]: Without dead ends: 1258 [2020-10-09 13:34:30,983 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-09 13:34:30,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2020-10-09 13:34:31,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1225. [2020-10-09 13:34:31,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1225 states. [2020-10-09 13:34:31,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1613 transitions. [2020-10-09 13:34:31,013 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1613 transitions. Word has length 104 [2020-10-09 13:34:31,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:31,013 INFO L481 AbstractCegarLoop]: Abstraction has 1225 states and 1613 transitions. [2020-10-09 13:34:31,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-09 13:34:31,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1613 transitions. [2020-10-09 13:34:31,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-09 13:34:31,019 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:31,020 INFO L421 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:31,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-09 13:34:31,235 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:31,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:31,235 INFO L82 PathProgramCache]: Analyzing trace with hash -912464595, now seen corresponding path program 21 times [2020-10-09 13:34:31,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:31,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274360790] [2020-10-09 13:34:31,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:31,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:31,730 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 22 proven. 703 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-09 13:34:31,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274360790] [2020-10-09 13:34:31,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584272072] [2020-10-09 13:34:31,731 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:31,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-09 13:34:31,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:34:31,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 13:34:31,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2020-10-09 13:34:32,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:32,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11] total 31 [2020-10-09 13:34:32,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824544716] [2020-10-09 13:34:32,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-09 13:34:32,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:32,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-09 13:34:32,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=645, Unknown=0, NotChecked=0, Total=930 [2020-10-09 13:34:32,093 INFO L87 Difference]: Start difference. First operand 1225 states and 1613 transitions. Second operand 31 states. [2020-10-09 13:34:41,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:41,161 INFO L93 Difference]: Finished difference Result 1460 states and 1896 transitions. [2020-10-09 13:34:41,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2020-10-09 13:34:41,162 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 108 [2020-10-09 13:34:41,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:41,166 INFO L225 Difference]: With dead ends: 1460 [2020-10-09 13:34:41,166 INFO L226 Difference]: Without dead ends: 1460 [2020-10-09 13:34:41,171 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16281 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=12705, Invalid=31605, Unknown=0, NotChecked=0, Total=44310 [2020-10-09 13:34:41,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2020-10-09 13:34:41,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1414. [2020-10-09 13:34:41,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1414 states. [2020-10-09 13:34:41,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 1846 transitions. [2020-10-09 13:34:41,192 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 1846 transitions. Word has length 108 [2020-10-09 13:34:41,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:41,192 INFO L481 AbstractCegarLoop]: Abstraction has 1414 states and 1846 transitions. [2020-10-09 13:34:41,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-09 13:34:41,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 1846 transitions. [2020-10-09 13:34:41,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-09 13:34:41,197 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:41,197 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:41,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-09 13:34:41,410 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:41,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:41,411 INFO L82 PathProgramCache]: Analyzing trace with hash 2018487717, now seen corresponding path program 22 times [2020-10-09 13:34:41,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:41,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201680921] [2020-10-09 13:34:41,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:41,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:41,547 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-09 13:34:41,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201680921] [2020-10-09 13:34:41,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294753764] [2020-10-09 13:34:41,548 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:42,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 13:34:42,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:34:42,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 13:34:42,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-09 13:34:42,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:42,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-09 13:34:42,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853311304] [2020-10-09 13:34:42,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 13:34:42,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:42,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 13:34:42,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-09 13:34:42,185 INFO L87 Difference]: Start difference. First operand 1414 states and 1846 transitions. Second operand 13 states. [2020-10-09 13:34:42,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:42,276 INFO L93 Difference]: Finished difference Result 1589 states and 2052 transitions. [2020-10-09 13:34:42,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 13:34:42,276 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 115 [2020-10-09 13:34:42,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:42,282 INFO L225 Difference]: With dead ends: 1589 [2020-10-09 13:34:42,283 INFO L226 Difference]: Without dead ends: 1589 [2020-10-09 13:34:42,283 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-09 13:34:42,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2020-10-09 13:34:42,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1543. [2020-10-09 13:34:42,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-10-09 13:34:42,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2002 transitions. [2020-10-09 13:34:42,306 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2002 transitions. Word has length 115 [2020-10-09 13:34:42,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:42,308 INFO L481 AbstractCegarLoop]: Abstraction has 1543 states and 2002 transitions. [2020-10-09 13:34:42,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 13:34:42,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2002 transitions. [2020-10-09 13:34:42,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-09 13:34:42,313 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:42,313 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:42,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:42,528 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:42,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:42,528 INFO L82 PathProgramCache]: Analyzing trace with hash -2042676161, now seen corresponding path program 23 times [2020-10-09 13:34:42,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:42,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599765601] [2020-10-09 13:34:42,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:42,697 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-09 13:34:42,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599765601] [2020-10-09 13:34:42,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998272056] [2020-10-09 13:34:42,699 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:42,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-10-09 13:34:42,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:34:42,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 13:34:42,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-09 13:34:42,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:42,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-09 13:34:42,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994702424] [2020-10-09 13:34:42,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-09 13:34:42,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:42,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-09 13:34:42,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-09 13:34:42,953 INFO L87 Difference]: Start difference. First operand 1543 states and 2002 transitions. Second operand 14 states. [2020-10-09 13:34:43,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:43,030 INFO L93 Difference]: Finished difference Result 1718 states and 2208 transitions. [2020-10-09 13:34:43,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 13:34:43,031 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 118 [2020-10-09 13:34:43,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:43,038 INFO L225 Difference]: With dead ends: 1718 [2020-10-09 13:34:43,038 INFO L226 Difference]: Without dead ends: 1718 [2020-10-09 13:34:43,038 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-09 13:34:43,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2020-10-09 13:34:43,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1672. [2020-10-09 13:34:43,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1672 states. [2020-10-09 13:34:43,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2158 transitions. [2020-10-09 13:34:43,063 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2158 transitions. Word has length 118 [2020-10-09 13:34:43,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:43,063 INFO L481 AbstractCegarLoop]: Abstraction has 1672 states and 2158 transitions. [2020-10-09 13:34:43,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-09 13:34:43,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2158 transitions. [2020-10-09 13:34:43,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-09 13:34:43,068 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:43,068 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:43,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-09 13:34:43,284 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:43,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:43,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1052962661, now seen corresponding path program 24 times [2020-10-09 13:34:43,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:43,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992968881] [2020-10-09 13:34:43,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:43,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-09 13:34:43,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992968881] [2020-10-09 13:34:43,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722241814] [2020-10-09 13:34:43,460 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:44,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-10-09 13:34:44,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:34:44,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 13:34:44,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:44,098 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-09 13:34:44,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:44,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-09 13:34:44,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931154208] [2020-10-09 13:34:44,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 13:34:44,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:44,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 13:34:44,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-09 13:34:44,099 INFO L87 Difference]: Start difference. First operand 1672 states and 2158 transitions. Second operand 15 states. [2020-10-09 13:34:44,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:44,191 INFO L93 Difference]: Finished difference Result 1847 states and 2364 transitions. [2020-10-09 13:34:44,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 13:34:44,191 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-10-09 13:34:44,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:44,202 INFO L225 Difference]: With dead ends: 1847 [2020-10-09 13:34:44,202 INFO L226 Difference]: Without dead ends: 1847 [2020-10-09 13:34:44,203 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-09 13:34:44,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2020-10-09 13:34:44,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1801. [2020-10-09 13:34:44,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1801 states. [2020-10-09 13:34:44,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2314 transitions. [2020-10-09 13:34:44,228 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2314 transitions. Word has length 121 [2020-10-09 13:34:44,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:44,228 INFO L481 AbstractCegarLoop]: Abstraction has 1801 states and 2314 transitions. [2020-10-09 13:34:44,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 13:34:44,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2314 transitions. [2020-10-09 13:34:44,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-09 13:34:44,233 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:44,233 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:44,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:44,446 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:44,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:44,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1691329151, now seen corresponding path program 25 times [2020-10-09 13:34:44,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:44,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776682351] [2020-10-09 13:34:44,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:44,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-09 13:34:44,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776682351] [2020-10-09 13:34:44,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8129373] [2020-10-09 13:34:44,630 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:44,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-09 13:34:44,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-09 13:34:44,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:44,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-09 13:34:44,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155868992] [2020-10-09 13:34:44,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 13:34:44,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:44,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 13:34:44,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-09 13:34:44,832 INFO L87 Difference]: Start difference. First operand 1801 states and 2314 transitions. Second operand 16 states. [2020-10-09 13:34:44,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:44,990 INFO L93 Difference]: Finished difference Result 1976 states and 2520 transitions. [2020-10-09 13:34:44,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 13:34:44,991 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 124 [2020-10-09 13:34:44,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:45,000 INFO L225 Difference]: With dead ends: 1976 [2020-10-09 13:34:45,000 INFO L226 Difference]: Without dead ends: 1976 [2020-10-09 13:34:45,000 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-09 13:34:45,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2020-10-09 13:34:45,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1930. [2020-10-09 13:34:45,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1930 states. [2020-10-09 13:34:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2470 transitions. [2020-10-09 13:34:45,039 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2470 transitions. Word has length 124 [2020-10-09 13:34:45,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:45,040 INFO L481 AbstractCegarLoop]: Abstraction has 1930 states and 2470 transitions. [2020-10-09 13:34:45,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 13:34:45,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2470 transitions. [2020-10-09 13:34:45,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-09 13:34:45,047 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:45,047 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:45,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-09 13:34:45,263 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:45,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:45,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1152246053, now seen corresponding path program 26 times [2020-10-09 13:34:45,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:45,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488961654] [2020-10-09 13:34:45,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-09 13:34:45,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488961654] [2020-10-09 13:34:45,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622380141] [2020-10-09 13:34:45,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:45,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 13:34:45,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:34:45,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 13:34:45,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:45,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-09 13:34:45,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:45,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-09 13:34:45,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562126684] [2020-10-09 13:34:45,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 13:34:45,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:45,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 13:34:45,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-09 13:34:45,671 INFO L87 Difference]: Start difference. First operand 1930 states and 2470 transitions. Second operand 17 states. [2020-10-09 13:34:45,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:45,746 INFO L93 Difference]: Finished difference Result 2105 states and 2676 transitions. [2020-10-09 13:34:45,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 13:34:45,747 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 127 [2020-10-09 13:34:45,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:45,753 INFO L225 Difference]: With dead ends: 2105 [2020-10-09 13:34:45,753 INFO L226 Difference]: Without dead ends: 2105 [2020-10-09 13:34:45,753 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-09 13:34:45,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2020-10-09 13:34:45,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 2059. [2020-10-09 13:34:45,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2059 states. [2020-10-09 13:34:45,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 2626 transitions. [2020-10-09 13:34:45,779 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 2626 transitions. Word has length 127 [2020-10-09 13:34:45,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:45,780 INFO L481 AbstractCegarLoop]: Abstraction has 2059 states and 2626 transitions. [2020-10-09 13:34:45,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 13:34:45,780 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 2626 transitions. [2020-10-09 13:34:45,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-09 13:34:45,784 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:45,784 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:45,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-09 13:34:46,000 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:46,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:46,000 INFO L82 PathProgramCache]: Analyzing trace with hash 210393279, now seen corresponding path program 27 times [2020-10-09 13:34:46,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:46,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080249645] [2020-10-09 13:34:46,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:46,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:46,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-09 13:34:46,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080249645] [2020-10-09 13:34:46,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550511150] [2020-10-09 13:34:46,271 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:46,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-10-09 13:34:46,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:34:46,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 13:34:46,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:46,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-09 13:34:46,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:46,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-09 13:34:46,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960238292] [2020-10-09 13:34:46,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-09 13:34:46,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:46,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-09 13:34:46,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-09 13:34:46,640 INFO L87 Difference]: Start difference. First operand 2059 states and 2626 transitions. Second operand 18 states. [2020-10-09 13:34:46,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:46,715 INFO L93 Difference]: Finished difference Result 2234 states and 2832 transitions. [2020-10-09 13:34:46,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 13:34:46,716 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 130 [2020-10-09 13:34:46,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:46,724 INFO L225 Difference]: With dead ends: 2234 [2020-10-09 13:34:46,725 INFO L226 Difference]: Without dead ends: 2234 [2020-10-09 13:34:46,728 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-09 13:34:46,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2020-10-09 13:34:46,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2188. [2020-10-09 13:34:46,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2188 states. [2020-10-09 13:34:46,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 2782 transitions. [2020-10-09 13:34:46,755 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 2782 transitions. Word has length 130 [2020-10-09 13:34:46,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:46,755 INFO L481 AbstractCegarLoop]: Abstraction has 2188 states and 2782 transitions. [2020-10-09 13:34:46,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-09 13:34:46,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 2782 transitions. [2020-10-09 13:34:46,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-09 13:34:46,760 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:46,760 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:46,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-09 13:34:46,968 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:46,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:46,968 INFO L82 PathProgramCache]: Analyzing trace with hash 495747813, now seen corresponding path program 28 times [2020-10-09 13:34:46,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:46,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348884506] [2020-10-09 13:34:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-09 13:34:47,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348884506] [2020-10-09 13:34:47,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447290559] [2020-10-09 13:34:47,309 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:48,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 13:34:48,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:34:48,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-09 13:34:48,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-09 13:34:48,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:48,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-09 13:34:48,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677643784] [2020-10-09 13:34:48,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 13:34:48,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:48,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 13:34:48,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-09 13:34:48,765 INFO L87 Difference]: Start difference. First operand 2188 states and 2782 transitions. Second operand 19 states. [2020-10-09 13:34:48,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:48,864 INFO L93 Difference]: Finished difference Result 2363 states and 2988 transitions. [2020-10-09 13:34:48,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 13:34:48,864 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 133 [2020-10-09 13:34:48,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:48,872 INFO L225 Difference]: With dead ends: 2363 [2020-10-09 13:34:48,873 INFO L226 Difference]: Without dead ends: 2363 [2020-10-09 13:34:48,873 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-09 13:34:48,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2020-10-09 13:34:48,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2317. [2020-10-09 13:34:48,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2317 states. [2020-10-09 13:34:48,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2938 transitions. [2020-10-09 13:34:48,894 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2938 transitions. Word has length 133 [2020-10-09 13:34:48,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:48,895 INFO L481 AbstractCegarLoop]: Abstraction has 2317 states and 2938 transitions. [2020-10-09 13:34:48,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 13:34:48,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2938 transitions. [2020-10-09 13:34:48,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-09 13:34:48,898 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:48,898 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:49,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:49,099 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:49,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:49,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1752391423, now seen corresponding path program 29 times [2020-10-09 13:34:49,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:49,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656828233] [2020-10-09 13:34:49,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:49,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-09 13:34:49,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656828233] [2020-10-09 13:34:49,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052446023] [2020-10-09 13:34:49,362 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:49,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-10-09 13:34:49,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:34:49,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-09 13:34:49,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:49,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-09 13:34:49,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:49,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-09 13:34:49,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214910015] [2020-10-09 13:34:49,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-09 13:34:49,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:49,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-09 13:34:49,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-09 13:34:49,697 INFO L87 Difference]: Start difference. First operand 2317 states and 2938 transitions. Second operand 20 states. [2020-10-09 13:34:49,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:49,815 INFO L93 Difference]: Finished difference Result 2492 states and 3144 transitions. [2020-10-09 13:34:49,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 13:34:49,816 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 136 [2020-10-09 13:34:49,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:49,822 INFO L225 Difference]: With dead ends: 2492 [2020-10-09 13:34:49,822 INFO L226 Difference]: Without dead ends: 2492 [2020-10-09 13:34:49,823 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-09 13:34:49,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2020-10-09 13:34:49,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2446. [2020-10-09 13:34:49,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2446 states. [2020-10-09 13:34:49,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3094 transitions. [2020-10-09 13:34:49,850 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3094 transitions. Word has length 136 [2020-10-09 13:34:49,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:49,850 INFO L481 AbstractCegarLoop]: Abstraction has 2446 states and 3094 transitions. [2020-10-09 13:34:49,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-09 13:34:49,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3094 transitions. [2020-10-09 13:34:49,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-09 13:34:49,853 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:49,853 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:50,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-09 13:34:50,061 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:50,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:50,061 INFO L82 PathProgramCache]: Analyzing trace with hash -807742299, now seen corresponding path program 30 times [2020-10-09 13:34:50,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:50,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742811898] [2020-10-09 13:34:50,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:50,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:50,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-09 13:34:50,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742811898] [2020-10-09 13:34:50,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353943651] [2020-10-09 13:34:50,325 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:50,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-10-09 13:34:50,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:34:50,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-09 13:34:50,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:50,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-09 13:34:50,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:50,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-09 13:34:50,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570668529] [2020-10-09 13:34:50,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-09 13:34:50,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:50,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-09 13:34:50,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-09 13:34:50,870 INFO L87 Difference]: Start difference. First operand 2446 states and 3094 transitions. Second operand 21 states. [2020-10-09 13:34:50,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:50,956 INFO L93 Difference]: Finished difference Result 2621 states and 3300 transitions. [2020-10-09 13:34:50,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 13:34:50,957 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 139 [2020-10-09 13:34:50,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:50,962 INFO L225 Difference]: With dead ends: 2621 [2020-10-09 13:34:50,963 INFO L226 Difference]: Without dead ends: 2621 [2020-10-09 13:34:50,963 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-09 13:34:50,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2020-10-09 13:34:50,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 2575. [2020-10-09 13:34:50,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2575 states. [2020-10-09 13:34:50,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 3250 transitions. [2020-10-09 13:34:50,992 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 3250 transitions. Word has length 139 [2020-10-09 13:34:50,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:50,993 INFO L481 AbstractCegarLoop]: Abstraction has 2575 states and 3250 transitions. [2020-10-09 13:34:50,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-09 13:34:50,993 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 3250 transitions. [2020-10-09 13:34:50,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-09 13:34:50,996 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:50,996 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:51,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:51,197 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:51,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:51,198 INFO L82 PathProgramCache]: Analyzing trace with hash 277787967, now seen corresponding path program 31 times [2020-10-09 13:34:51,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:51,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659215186] [2020-10-09 13:34:51,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:51,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-09 13:34:51,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659215186] [2020-10-09 13:34:51,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868991522] [2020-10-09 13:34:51,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:51,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 13:34:51,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-09 13:34:51,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:51,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-09 13:34:51,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838607484] [2020-10-09 13:34:51,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-09 13:34:51,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:51,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-09 13:34:51,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-09 13:34:51,663 INFO L87 Difference]: Start difference. First operand 2575 states and 3250 transitions. Second operand 22 states. [2020-10-09 13:34:51,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:51,795 INFO L93 Difference]: Finished difference Result 2750 states and 3456 transitions. [2020-10-09 13:34:51,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 13:34:51,796 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 142 [2020-10-09 13:34:51,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:51,802 INFO L225 Difference]: With dead ends: 2750 [2020-10-09 13:34:51,802 INFO L226 Difference]: Without dead ends: 2750 [2020-10-09 13:34:51,802 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-09 13:34:51,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2020-10-09 13:34:51,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2704. [2020-10-09 13:34:51,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2704 states. [2020-10-09 13:34:51,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 3406 transitions. [2020-10-09 13:34:51,837 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 3406 transitions. Word has length 142 [2020-10-09 13:34:51,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:51,838 INFO L481 AbstractCegarLoop]: Abstraction has 2704 states and 3406 transitions. [2020-10-09 13:34:51,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-09 13:34:51,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 3406 transitions. [2020-10-09 13:34:51,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-09 13:34:51,843 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:51,843 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:52,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-09 13:34:52,057 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:52,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:52,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1793796507, now seen corresponding path program 32 times [2020-10-09 13:34:52,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:52,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785149836] [2020-10-09 13:34:52,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:52,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-09 13:34:52,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785149836] [2020-10-09 13:34:52,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589944383] [2020-10-09 13:34:52,533 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:52,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 13:34:52,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:34:52,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-09 13:34:52,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-09 13:34:52,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:52,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-09 13:34:52,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138001044] [2020-10-09 13:34:52,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 13:34:52,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:52,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 13:34:52,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-09 13:34:52,798 INFO L87 Difference]: Start difference. First operand 2704 states and 3406 transitions. Second operand 23 states. [2020-10-09 13:34:52,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:34:52,918 INFO L93 Difference]: Finished difference Result 2833 states and 3562 transitions. [2020-10-09 13:34:52,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 13:34:52,919 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 145 [2020-10-09 13:34:52,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:34:52,923 INFO L225 Difference]: With dead ends: 2833 [2020-10-09 13:34:52,923 INFO L226 Difference]: Without dead ends: 2833 [2020-10-09 13:34:52,924 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-09 13:34:52,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2020-10-09 13:34:52,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2833. [2020-10-09 13:34:52,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2833 states. [2020-10-09 13:34:52,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 3562 transitions. [2020-10-09 13:34:52,946 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 3562 transitions. Word has length 145 [2020-10-09 13:34:52,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:34:52,947 INFO L481 AbstractCegarLoop]: Abstraction has 2833 states and 3562 transitions. [2020-10-09 13:34:52,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 13:34:52,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 3562 transitions. [2020-10-09 13:34:52,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-09 13:34:52,951 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:34:52,952 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:34:53,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-09 13:34:53,153 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:34:53,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:34:53,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1981785217, now seen corresponding path program 33 times [2020-10-09 13:34:53,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:34:53,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825900348] [2020-10-09 13:34:53,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:34:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:34:56,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:34:56,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825900348] [2020-10-09 13:34:56,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033307374] [2020-10-09 13:34:56,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:34:56,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-10-09 13:34:56,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:34:56,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-09 13:34:56,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:34:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:34:57,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:34:57,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-09 13:34:57,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904137295] [2020-10-09 13:34:57,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-09 13:34:57,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:34:57,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-09 13:34:57,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-09 13:34:57,053 INFO L87 Difference]: Start difference. First operand 2833 states and 3562 transitions. Second operand 63 states. [2020-10-09 13:36:20,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:36:20,014 INFO L93 Difference]: Finished difference Result 32926 states and 45933 transitions. [2020-10-09 13:36:20,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 633 states. [2020-10-09 13:36:20,015 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-10-09 13:36:20,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:36:20,084 INFO L225 Difference]: With dead ends: 32926 [2020-10-09 13:36:20,084 INFO L226 Difference]: Without dead ends: 32924 [2020-10-09 13:36:20,097 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 632 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162735 ImplicationChecksByTransitivity, 32.8s TimeCoverageRelationStatistics Valid=2407, Invalid=398915, Unknown=0, NotChecked=0, Total=401322 [2020-10-09 13:36:20,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32924 states. [2020-10-09 13:36:20,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32924 to 2967. [2020-10-09 13:36:20,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2967 states. [2020-10-09 13:36:20,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 3794 transitions. [2020-10-09 13:36:20,292 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 3794 transitions. Word has length 148 [2020-10-09 13:36:20,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:36:20,293 INFO L481 AbstractCegarLoop]: Abstraction has 2967 states and 3794 transitions. [2020-10-09 13:36:20,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-09 13:36:20,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 3794 transitions. [2020-10-09 13:36:20,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-09 13:36:20,300 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:36:20,300 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:36:20,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-09 13:36:20,514 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:36:20,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:36:20,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1970430061, now seen corresponding path program 34 times [2020-10-09 13:36:20,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:36:20,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591919500] [2020-10-09 13:36:20,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:36:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:36:23,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:36:23,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591919500] [2020-10-09 13:36:23,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985878997] [2020-10-09 13:36:23,901 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:36:25,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 13:36:25,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:36:25,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-09 13:36:25,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:36:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:36:26,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:36:26,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-09 13:36:26,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478651371] [2020-10-09 13:36:26,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-09 13:36:26,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:36:26,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-09 13:36:26,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-09 13:36:26,099 INFO L87 Difference]: Start difference. First operand 2967 states and 3794 transitions. Second operand 63 states. [2020-10-09 13:37:48,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:37:48,195 INFO L93 Difference]: Finished difference Result 30945 states and 43173 transitions. [2020-10-09 13:37:48,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-10-09 13:37:48,196 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-10-09 13:37:48,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:37:48,234 INFO L225 Difference]: With dead ends: 30945 [2020-10-09 13:37:48,234 INFO L226 Difference]: Without dead ends: 30943 [2020-10-09 13:37:48,261 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 34.0s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-10-09 13:37:48,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30943 states. [2020-10-09 13:37:48,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30943 to 2973. [2020-10-09 13:37:48,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2973 states. [2020-10-09 13:37:48,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 3801 transitions. [2020-10-09 13:37:48,435 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 3801 transitions. Word has length 148 [2020-10-09 13:37:48,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:37:48,435 INFO L481 AbstractCegarLoop]: Abstraction has 2973 states and 3801 transitions. [2020-10-09 13:37:48,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-09 13:37:48,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 3801 transitions. [2020-10-09 13:37:48,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-09 13:37:48,440 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:37:48,440 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:37:48,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-09 13:37:48,653 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:37:48,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:37:48,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1092472257, now seen corresponding path program 35 times [2020-10-09 13:37:48,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:37:48,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300739173] [2020-10-09 13:37:48,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:37:48,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:37:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:37:52,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300739173] [2020-10-09 13:37:52,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62523045] [2020-10-09 13:37:52,044 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:37:52,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-10-09 13:37:52,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:37:52,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-09 13:37:52,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:37:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:37:52,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:37:52,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-09 13:37:52,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074560357] [2020-10-09 13:37:52,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-09 13:37:52,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:37:52,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-09 13:37:52,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-09 13:37:52,510 INFO L87 Difference]: Start difference. First operand 2973 states and 3801 transitions. Second operand 63 states. [2020-10-09 13:39:16,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:39:16,102 INFO L93 Difference]: Finished difference Result 30939 states and 43164 transitions. [2020-10-09 13:39:16,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-10-09 13:39:16,103 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-10-09 13:39:16,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:39:16,140 INFO L225 Difference]: With dead ends: 30939 [2020-10-09 13:39:16,140 INFO L226 Difference]: Without dead ends: 30937 [2020-10-09 13:39:16,149 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-10-09 13:39:16,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30937 states. [2020-10-09 13:39:16,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30937 to 2979. [2020-10-09 13:39:16,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2979 states. [2020-10-09 13:39:16,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2979 states to 2979 states and 3808 transitions. [2020-10-09 13:39:16,354 INFO L78 Accepts]: Start accepts. Automaton has 2979 states and 3808 transitions. Word has length 148 [2020-10-09 13:39:16,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:39:16,354 INFO L481 AbstractCegarLoop]: Abstraction has 2979 states and 3808 transitions. [2020-10-09 13:39:16,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-09 13:39:16,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2979 states and 3808 transitions. [2020-10-09 13:39:16,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-09 13:39:16,361 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:39:16,361 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:39:16,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-09 13:39:16,576 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:39:16,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:39:16,577 INFO L82 PathProgramCache]: Analyzing trace with hash 769524141, now seen corresponding path program 36 times [2020-10-09 13:39:16,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:39:16,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554748098] [2020-10-09 13:39:16,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:39:16,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:39:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:39:20,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554748098] [2020-10-09 13:39:20,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612683619] [2020-10-09 13:39:20,266 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:39:20,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-10-09 13:39:20,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:39:20,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-09 13:39:20,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:39:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:39:21,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:39:21,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-09 13:39:21,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753942224] [2020-10-09 13:39:21,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-09 13:39:21,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:39:21,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-09 13:39:21,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-09 13:39:21,014 INFO L87 Difference]: Start difference. First operand 2979 states and 3808 transitions. Second operand 63 states. [2020-10-09 13:40:48,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:40:48,787 INFO L93 Difference]: Finished difference Result 30933 states and 43155 transitions. [2020-10-09 13:40:48,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-10-09 13:40:48,788 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-10-09 13:40:48,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:40:48,824 INFO L225 Difference]: With dead ends: 30933 [2020-10-09 13:40:48,825 INFO L226 Difference]: Without dead ends: 30931 [2020-10-09 13:40:48,847 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 38.2s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-10-09 13:40:48,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30931 states. [2020-10-09 13:40:49,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30931 to 2985. [2020-10-09 13:40:49,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2985 states. [2020-10-09 13:40:49,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2985 states to 2985 states and 3815 transitions. [2020-10-09 13:40:49,134 INFO L78 Accepts]: Start accepts. Automaton has 2985 states and 3815 transitions. Word has length 148 [2020-10-09 13:40:49,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:40:49,137 INFO L481 AbstractCegarLoop]: Abstraction has 2985 states and 3815 transitions. [2020-10-09 13:40:49,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-09 13:40:49,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2985 states and 3815 transitions. [2020-10-09 13:40:49,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-09 13:40:49,144 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:40:49,144 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:40:49,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-09 13:40:49,357 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:40:49,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:40:49,358 INFO L82 PathProgramCache]: Analyzing trace with hash -188999425, now seen corresponding path program 37 times [2020-10-09 13:40:49,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:40:49,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284530023] [2020-10-09 13:40:49,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:40:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:40:53,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:40:53,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284530023] [2020-10-09 13:40:53,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563650454] [2020-10-09 13:40:53,314 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:40:53,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:40:53,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-09 13:40:53,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:40:53,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:40:53,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:40:53,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-09 13:40:53,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099234945] [2020-10-09 13:40:53,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-09 13:40:53,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:40:53,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-09 13:40:53,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-09 13:40:53,691 INFO L87 Difference]: Start difference. First operand 2985 states and 3815 transitions. Second operand 63 states. [2020-10-09 13:42:27,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:42:27,892 INFO L93 Difference]: Finished difference Result 30927 states and 43146 transitions. [2020-10-09 13:42:27,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-10-09 13:42:27,893 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-10-09 13:42:27,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:42:27,914 INFO L225 Difference]: With dead ends: 30927 [2020-10-09 13:42:27,914 INFO L226 Difference]: Without dead ends: 30925 [2020-10-09 13:42:27,924 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 40.8s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-10-09 13:42:27,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30925 states. [2020-10-09 13:42:28,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30925 to 2991. [2020-10-09 13:42:28,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2991 states. [2020-10-09 13:42:28,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 3822 transitions. [2020-10-09 13:42:28,075 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 3822 transitions. Word has length 148 [2020-10-09 13:42:28,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:42:28,075 INFO L481 AbstractCegarLoop]: Abstraction has 2991 states and 3822 transitions. [2020-10-09 13:42:28,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-09 13:42:28,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 3822 transitions. [2020-10-09 13:42:28,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-09 13:42:28,080 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:42:28,080 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:42:28,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-09 13:42:28,295 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:42:28,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:42:28,295 INFO L82 PathProgramCache]: Analyzing trace with hash 48993005, now seen corresponding path program 38 times [2020-10-09 13:42:28,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:42:28,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629765997] [2020-10-09 13:42:28,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:42:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:42:32,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:42:32,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629765997] [2020-10-09 13:42:32,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500881018] [2020-10-09 13:42:32,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:42:32,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 13:42:32,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:42:32,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-09 13:42:32,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:42:32,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:42:32,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:42:32,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-09 13:42:32,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259921731] [2020-10-09 13:42:32,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-09 13:42:32,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:42:32,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-09 13:42:32,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-09 13:42:32,721 INFO L87 Difference]: Start difference. First operand 2991 states and 3822 transitions. Second operand 63 states. [2020-10-09 13:44:15,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:44:15,862 INFO L93 Difference]: Finished difference Result 30921 states and 43137 transitions. [2020-10-09 13:44:15,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-10-09 13:44:15,863 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-10-09 13:44:15,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:44:15,890 INFO L225 Difference]: With dead ends: 30921 [2020-10-09 13:44:15,890 INFO L226 Difference]: Without dead ends: 30919 [2020-10-09 13:44:15,897 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 43.3s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-10-09 13:44:15,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30919 states. [2020-10-09 13:44:15,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30919 to 2997. [2020-10-09 13:44:15,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2997 states. [2020-10-09 13:44:15,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2997 states to 2997 states and 3829 transitions. [2020-10-09 13:44:15,998 INFO L78 Accepts]: Start accepts. Automaton has 2997 states and 3829 transitions. Word has length 148 [2020-10-09 13:44:15,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:44:15,999 INFO L481 AbstractCegarLoop]: Abstraction has 2997 states and 3829 transitions. [2020-10-09 13:44:15,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-09 13:44:15,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2997 states and 3829 transitions. [2020-10-09 13:44:16,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-09 13:44:16,004 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:44:16,004 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:44:16,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-09 13:44:16,218 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:44:16,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:44:16,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1924796351, now seen corresponding path program 39 times [2020-10-09 13:44:16,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:44:16,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961020586] [2020-10-09 13:44:16,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:44:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:44:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:44:20,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961020586] [2020-10-09 13:44:20,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852956353] [2020-10-09 13:44:20,815 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:44:21,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-10-09 13:44:21,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:44:21,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-09 13:44:21,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:44:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:44:21,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:44:21,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-09 13:44:21,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35329362] [2020-10-09 13:44:21,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-09 13:44:21,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:44:21,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-09 13:44:21,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-09 13:44:21,834 INFO L87 Difference]: Start difference. First operand 2997 states and 3829 transitions. Second operand 63 states. [2020-10-09 13:46:17,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:46:17,877 INFO L93 Difference]: Finished difference Result 30915 states and 43128 transitions. [2020-10-09 13:46:17,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-10-09 13:46:17,879 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-10-09 13:46:17,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:46:17,898 INFO L225 Difference]: With dead ends: 30915 [2020-10-09 13:46:17,899 INFO L226 Difference]: Without dead ends: 30913 [2020-10-09 13:46:17,905 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 47.3s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-10-09 13:46:17,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30913 states. [2020-10-09 13:46:17,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30913 to 3003. [2020-10-09 13:46:17,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3003 states. [2020-10-09 13:46:17,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 3836 transitions. [2020-10-09 13:46:17,998 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 3836 transitions. Word has length 148 [2020-10-09 13:46:17,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:46:17,998 INFO L481 AbstractCegarLoop]: Abstraction has 3003 states and 3836 transitions. [2020-10-09 13:46:17,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-09 13:46:17,998 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 3836 transitions. [2020-10-09 13:46:18,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-09 13:46:18,001 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:46:18,001 INFO L421 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:46:18,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:46:18,202 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:46:18,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:46:18,203 INFO L82 PathProgramCache]: Analyzing trace with hash -791735251, now seen corresponding path program 40 times [2020-10-09 13:46:18,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:46:18,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862593454] [2020-10-09 13:46:18,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:46:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:46:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:46:23,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862593454] [2020-10-09 13:46:23,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831797658] [2020-10-09 13:46:23,196 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:46:25,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 13:46:25,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 13:46:25,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-09 13:46:25,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:46:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:46:25,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:46:25,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-09 13:46:25,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923062939] [2020-10-09 13:46:25,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-09 13:46:25,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:46:25,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-09 13:46:25,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-09 13:46:25,485 INFO L87 Difference]: Start difference. First operand 3003 states and 3836 transitions. Second operand 63 states. Received shutdown request... [2020-10-09 13:47:02,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2020-10-09 13:47:02,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:47:02,413 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-09 13:47:02,418 WARN L235 ceAbstractionStarter]: Timeout [2020-10-09 13:47:02,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 01:47:02 BasicIcfg [2020-10-09 13:47:02,418 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 13:47:02,420 INFO L168 Benchmark]: Toolchain (without parser) took 781579.99 ms. Allocated memory was 252.2 MB in the beginning and 1.1 GB in the end (delta: 871.9 MB). Free memory was 207.0 MB in the beginning and 852.5 MB in the end (delta: -645.5 MB). Peak memory consumption was 226.4 MB. Max. memory is 14.2 GB. [2020-10-09 13:47:02,420 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 252.2 MB. Free memory was 230.2 MB in the beginning and 229.4 MB in the end (delta: 839.1 kB). Peak memory consumption was 839.1 kB. Max. memory is 14.2 GB. [2020-10-09 13:47:02,421 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1150.40 ms. Allocated memory was 252.2 MB in the beginning and 317.2 MB in the end (delta: 65.0 MB). Free memory was 207.0 MB in the beginning and 217.0 MB in the end (delta: -10.0 MB). Peak memory consumption was 65.3 MB. Max. memory is 14.2 GB. [2020-10-09 13:47:02,421 INFO L168 Benchmark]: Boogie Procedure Inliner took 99.57 ms. Allocated memory is still 317.2 MB. Free memory was 216.2 MB in the beginning and 213.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 13:47:02,421 INFO L168 Benchmark]: Boogie Preprocessor took 32.91 ms. Allocated memory is still 317.2 MB. Free memory was 213.7 MB in the beginning and 212.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. [2020-10-09 13:47:02,422 INFO L168 Benchmark]: RCFGBuilder took 471.48 ms. Allocated memory is still 317.2 MB. Free memory was 212.0 MB in the beginning and 185.4 MB in the end (delta: 26.5 MB). Peak memory consumption was 26.5 MB. Max. memory is 14.2 GB. [2020-10-09 13:47:02,422 INFO L168 Benchmark]: TraceAbstraction took 779819.88 ms. Allocated memory was 317.2 MB in the beginning and 1.1 GB in the end (delta: 806.9 MB). Free memory was 185.4 MB in the beginning and 852.5 MB in the end (delta: -667.1 MB). Peak memory consumption was 139.8 MB. Max. memory is 14.2 GB. [2020-10-09 13:47:02,424 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 252.2 MB. Free memory was 230.2 MB in the beginning and 229.4 MB in the end (delta: 839.1 kB). Peak memory consumption was 839.1 kB. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 1150.40 ms. Allocated memory was 252.2 MB in the beginning and 317.2 MB in the end (delta: 65.0 MB). Free memory was 207.0 MB in the beginning and 217.0 MB in the end (delta: -10.0 MB). Peak memory consumption was 65.3 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 99.57 ms. Allocated memory is still 317.2 MB. Free memory was 216.2 MB in the beginning and 213.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 32.91 ms. Allocated memory is still 317.2 MB. Free memory was 213.7 MB in the beginning and 212.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. * RCFGBuilder took 471.48 ms. Allocated memory is still 317.2 MB. Free memory was 212.0 MB in the beginning and 185.4 MB in the end (delta: 26.5 MB). Peak memory consumption was 26.5 MB. Max. memory is 14.2 GB. * TraceAbstraction took 779819.88 ms. Allocated memory was 317.2 MB in the beginning and 1.1 GB in the end (delta: 806.9 MB). Free memory was 185.4 MB in the beginning and 852.5 MB in the end (delta: -667.1 MB). Peak memory consumption was 139.8 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 424 VarBasedMoverChecksPositive, 20 VarBasedMoverChecksNegative, 4 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 36 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.0s, 78 PlacesBefore, 19 PlacesAfterwards, 81 TransitionsBefore, 17 TransitionsAfterwards, 646 CoEnabledTransitionPairs, 5 FixpointIterations, 38 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 6 ConcurrentYvCompositions, 5 ChoiceCompositions, 75 TotalNumberOfCompositions, 823 MoverChecksTotal - TimeoutResultAtElement [Line: 2]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 2). Cancelled while BasicCegarLoop was constructing difference of abstraction (3003states) and FLOYD_HOARE automaton (currently 190 states, 63 states before enhancement),while ReachableStatesComputation was computing reachable states (4183 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 75 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 779.6s, OverallIterations: 42, TraceHistogramMax: 20, AutomataDifference: 710.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, HoareTripleCheckerStatistics: 16920 SDtfs, 25396 SDslu, 952156 SDs, 0 SdLazy, 549056 SolverSat, 5976 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 255.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9893 GetRequests, 4353 SyntacticMatches, 16 SemanticMatches, 5524 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120085 ImplicationChecksByTransitivity, 312.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3003occurred in iteration=41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.8s AutomataMinimizationTime, 41 MinimizatonAttempts, 198749 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 12.2s SatisfiabilityAnalysisTime, 39.3s InterpolantComputationTime, 7745 NumberOfCodeBlocks, 7514 NumberOfCodeBlocksAsserted, 373 NumberOfCheckSat, 7663 ConstructedInterpolants, 0 QuantifiedInterpolants, 3908851 SizeOfPredicates, 353 NumberOfNonLiveVariables, 14635 ConjunctsInSsa, 1678 ConjunctsInUnsatCore, 82 InterpolantComputations, 3 PerfectInterpolantSequences, 20421/56945 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown