/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/pthread/fib_bench_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:28:48,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:28:48,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:28:48,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:28:48,450 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:28:48,451 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:28:48,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:28:48,456 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:28:48,458 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:28:48,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:28:48,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:28:48,462 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:28:48,463 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:28:48,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:28:48,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:28:48,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:28:48,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:28:48,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:28:48,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:28:48,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:28:48,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:28:48,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:28:48,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:28:48,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:28:48,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 10:28:48,501 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 10:28:48,501 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 10:28:48,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 10:28:48,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 10:28:48,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 10:28:48,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 10:28:48,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 10:28:48,507 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 10:28:48,508 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 10:28:48,510 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 10:28:48,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 10:28:48,511 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 10:28:48,511 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 10:28:48,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:28:48,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:28:48,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:28:48,517 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:28:48,572 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:28:48,573 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:28:48,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:28:48,577 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:28:48,578 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:28:48,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:28:48,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:28:48,579 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:28:48,579 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:28:48,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:28:48,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:28:48,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:28:48,581 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:28:48,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:28:48,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:28:48,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:28:48,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:28:48,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:28:48,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:28:48,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:28:48,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:28:48,583 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:28:48,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:28:48,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:28:48,584 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:28:48,584 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:28:49,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:28:49,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:28:49,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:28:49,117 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:28:49,118 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:28:49,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_bench_longest-2.i [2020-12-22 10:28:49,200 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd5d76fb3/6625736223814f399693cd7f37b6d6e4/FLAG174bd5d91 [2020-12-22 10:28:49,857 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:28:49,858 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_bench_longest-2.i [2020-12-22 10:28:49,874 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd5d76fb3/6625736223814f399693cd7f37b6d6e4/FLAG174bd5d91 [2020-12-22 10:28:50,135 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd5d76fb3/6625736223814f399693cd7f37b6d6e4 [2020-12-22 10:28:50,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:28:50,141 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:28:50,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:28:50,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:28:50,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:28:50,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:28:50" (1/1) ... [2020-12-22 10:28:50,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b404510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:28:50, skipping insertion in model container [2020-12-22 10:28:50,154 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:28:50" (1/1) ... [2020-12-22 10:28:50,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:28:50,242 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:28:50,605 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_bench_longest-2.i[30286,30299] [2020-12-22 10:28:50,628 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_bench_longest-2.i[31040,31053] [2020-12-22 10:28:50,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:28:50,640 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:28:50,681 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_bench_longest-2.i[30286,30299] [2020-12-22 10:28:50,688 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_bench_longest-2.i[31040,31053] [2020-12-22 10:28:50,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:28:50,838 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:28:50,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:28:50 WrapperNode [2020-12-22 10:28:50,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:28:50,840 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:28:50,840 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:28:50,841 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:28:50,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:28:50" (1/1) ... [2020-12-22 10:28:50,866 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:28:50" (1/1) ... [2020-12-22 10:28:50,891 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:28:50,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:28:50,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:28:50,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:28:50,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:28:50" (1/1) ... [2020-12-22 10:28:50,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:28:50" (1/1) ... [2020-12-22 10:28:50,907 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:28:50" (1/1) ... [2020-12-22 10:28:50,907 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:28:50" (1/1) ... [2020-12-22 10:28:50,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:28:50" (1/1) ... [2020-12-22 10:28:50,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:28:50" (1/1) ... [2020-12-22 10:28:50,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:28:50" (1/1) ... [2020-12-22 10:28:50,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:28:50,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:28:50,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:28:50,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:28:50,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:28:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:28:51,051 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-12-22 10:28:51,051 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-12-22 10:28:51,051 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-12-22 10:28:51,052 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-12-22 10:28:51,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 10:28:51,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-22 10:28:51,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:28:51,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 10:28:51,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:28:51,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-22 10:28:51,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:28:51,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:28:51,055 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-12-22 10:28:51,544 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:28:51,545 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-22 10:28:51,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:28:51 BoogieIcfgContainer [2020-12-22 10:28:51,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:28:51,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:28:51,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:28:51,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:28:51,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:28:50" (1/3) ... [2020-12-22 10:28:51,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@106c2682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:28:51, skipping insertion in model container [2020-12-22 10:28:51,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:28:50" (2/3) ... [2020-12-22 10:28:51,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@106c2682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:28:51, skipping insertion in model container [2020-12-22 10:28:51,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:28:51" (3/3) ... [2020-12-22 10:28:51,557 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2020-12-22 10:28:51,564 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-22 10:28:51,565 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:28:51,571 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 10:28:51,573 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-22 10:28:51,608 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,609 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,609 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,609 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,610 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,610 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,610 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,610 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,610 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,611 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,611 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,611 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,611 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,612 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,612 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,612 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,612 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,613 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,613 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,613 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,613 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,614 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,614 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,614 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,614 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,614 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,615 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,615 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,615 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,615 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,616 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,616 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,616 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,617 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,617 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,617 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,617 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,617 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,618 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,618 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,618 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,618 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,619 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,619 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,619 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,619 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,620 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,620 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,620 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,620 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,621 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,621 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,621 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,621 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,621 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,622 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,622 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,622 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,622 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,623 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,625 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,626 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,626 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,626 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,626 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,626 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,632 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,632 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,633 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,633 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,633 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,633 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:51,636 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-22 10:28:51,656 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 10:28:51,681 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:28:51,681 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:28:51,682 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:28:51,682 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:28:51,682 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:28:51,682 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:28:51,682 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:28:51,682 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:28:51,696 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-22 10:28:51,698 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 64 places, 62 transitions, 134 flow [2020-12-22 10:28:51,702 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 64 places, 62 transitions, 134 flow [2020-12-22 10:28:51,704 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 64 places, 62 transitions, 134 flow [2020-12-22 10:28:51,748 INFO L129 PetriNetUnfolder]: 5/60 cut-off events. [2020-12-22 10:28:51,748 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-12-22 10:28:51,754 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 60 events. 5/60 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 89 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2020-12-22 10:28:51,757 INFO L116 LiptonReduction]: Number of co-enabled transitions 1080 [2020-12-22 10:28:54,574 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 10:28:55,140 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-12-22 10:28:55,279 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 10:28:55,574 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-12-22 10:28:55,710 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 10:28:55,714 INFO L131 LiptonReduction]: Checked pairs total: 1148 [2020-12-22 10:28:55,714 INFO L133 LiptonReduction]: Total number of compositions: 55 [2020-12-22 10:28:55,725 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-12-22 10:28:55,735 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-12-22 10:28:55,737 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-12-22 10:28:55,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 10:28:55,744 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:55,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 10:28:55,745 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:55,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:55,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1040753464, now seen corresponding path program 1 times [2020-12-22 10:28:55,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:55,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394954388] [2020-12-22 10:28:55,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:55,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:56,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:56,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394954388] [2020-12-22 10:28:56,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:28:56,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:28:56,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269359249] [2020-12-22 10:28:56,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:28:56,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:56,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:28:56,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:28:56,136 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-12-22 10:28:56,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:56,252 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-12-22 10:28:56,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:28:56,255 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-22 10:28:56,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:56,269 INFO L225 Difference]: With dead ends: 83 [2020-12-22 10:28:56,269 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 10:28:56,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:28:56,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 10:28:56,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-12-22 10:28:56,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 10:28:56,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-12-22 10:28:56,316 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-12-22 10:28:56,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:56,317 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-12-22 10:28:56,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:28:56,317 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-12-22 10:28:56,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 10:28:56,318 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:56,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:56,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:28:56,319 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:56,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:56,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1204102091, now seen corresponding path program 1 times [2020-12-22 10:28:56,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:56,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183360727] [2020-12-22 10:28:56,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:56,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:56,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:56,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183360727] [2020-12-22 10:28:56,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:28:56,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:28:56,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881487435] [2020-12-22 10:28:56,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:28:56,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:56,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:28:56,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:28:56,470 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-12-22 10:28:56,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:56,555 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-12-22 10:28:56,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:28:56,556 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 10:28:56,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:56,558 INFO L225 Difference]: With dead ends: 80 [2020-12-22 10:28:56,559 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 10:28:56,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:28:56,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 10:28:56,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-12-22 10:28:56,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 10:28:56,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-12-22 10:28:56,573 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-12-22 10:28:56,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:56,574 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-12-22 10:28:56,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:28:56,575 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-12-22 10:28:56,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 10:28:56,576 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:56,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:56,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:28:56,576 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:56,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:56,577 INFO L82 PathProgramCache]: Analyzing trace with hash 563301308, now seen corresponding path program 1 times [2020-12-22 10:28:56,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:56,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607021352] [2020-12-22 10:28:56,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:56,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607021352] [2020-12-22 10:28:56,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:28:56,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:28:56,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631575298] [2020-12-22 10:28:56,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:28:56,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:56,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:28:56,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:28:56,668 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-12-22 10:28:56,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:56,708 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-12-22 10:28:56,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:28:56,710 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 10:28:56,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:56,712 INFO L225 Difference]: With dead ends: 73 [2020-12-22 10:28:56,712 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 10:28:56,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:28:56,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 10:28:56,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-12-22 10:28:56,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 10:28:56,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-12-22 10:28:56,723 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-12-22 10:28:56,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:56,724 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-12-22 10:28:56,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:28:56,724 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-12-22 10:28:56,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 10:28:56,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:56,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:56,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:28:56,726 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:56,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:56,726 INFO L82 PathProgramCache]: Analyzing trace with hash 563669588, now seen corresponding path program 2 times [2020-12-22 10:28:56,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:56,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972792142] [2020-12-22 10:28:56,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:56,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:56,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972792142] [2020-12-22 10:28:56,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:28:56,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:28:56,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755041997] [2020-12-22 10:28:56,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:28:56,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:56,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:28:56,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:28:56,820 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-12-22 10:28:56,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:56,929 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-12-22 10:28:56,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:28:56,930 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 10:28:56,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:56,932 INFO L225 Difference]: With dead ends: 86 [2020-12-22 10:28:56,932 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 10:28:56,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:28:56,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 10:28:56,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-12-22 10:28:56,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 10:28:56,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-12-22 10:28:56,943 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-12-22 10:28:56,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:56,943 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-12-22 10:28:56,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:28:56,943 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-12-22 10:28:56,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 10:28:56,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:56,945 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:56,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:28:56,945 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:56,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:56,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1304831828, now seen corresponding path program 2 times [2020-12-22 10:28:56,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:56,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940114116] [2020-12-22 10:28:56,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:56,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:57,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940114116] [2020-12-22 10:28:57,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570584028] [2020-12-22 10:28:57,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 10:28:57,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:57,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:57,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 10:28:57,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:57,396 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:57,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:57,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:57,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-12-22 10:28:57,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068450929] [2020-12-22 10:28:57,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:28:57,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:57,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:28:57,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:28:57,459 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-12-22 10:28:57,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:57,645 INFO L93 Difference]: Finished difference Result 121 states and 281 transitions. [2020-12-22 10:28:57,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 10:28:57,646 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-12-22 10:28:57,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:57,647 INFO L225 Difference]: With dead ends: 121 [2020-12-22 10:28:57,647 INFO L226 Difference]: Without dead ends: 113 [2020-12-22 10:28:57,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:28:57,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-22 10:28:57,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 76. [2020-12-22 10:28:57,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-22 10:28:57,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-12-22 10:28:57,668 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 9 [2020-12-22 10:28:57,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:57,669 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-12-22 10:28:57,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:28:57,669 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-12-22 10:28:57,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 10:28:57,670 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:57,670 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:57,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:57,872 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:57,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:57,873 INFO L82 PathProgramCache]: Analyzing trace with hash 282471732, now seen corresponding path program 3 times [2020-12-22 10:28:57,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:57,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668341425] [2020-12-22 10:28:57,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:57,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:57,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668341425] [2020-12-22 10:28:57,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449206703] [2020-12-22 10:28:57,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:58,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:28:58,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:58,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 10:28:58,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:58,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:58,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:58,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-12-22 10:28:58,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129436790] [2020-12-22 10:28:58,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:28:58,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:58,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:28:58,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:28:58,127 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 9 states. [2020-12-22 10:28:58,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:58,176 INFO L93 Difference]: Finished difference Result 89 states and 215 transitions. [2020-12-22 10:28:58,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:28:58,176 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-22 10:28:58,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:58,178 INFO L225 Difference]: With dead ends: 89 [2020-12-22 10:28:58,178 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 10:28:58,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:28:58,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 10:28:58,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2020-12-22 10:28:58,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 10:28:58,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 195 transitions. [2020-12-22 10:28:58,188 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 195 transitions. Word has length 9 [2020-12-22 10:28:58,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:58,188 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 195 transitions. [2020-12-22 10:28:58,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:28:58,188 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 195 transitions. [2020-12-22 10:28:58,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 10:28:58,190 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:58,190 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:58,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:58,404 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:58,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:58,407 INFO L82 PathProgramCache]: Analyzing trace with hash 293888412, now seen corresponding path program 4 times [2020-12-22 10:28:58,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:58,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122496912] [2020-12-22 10:28:58,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:58,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122496912] [2020-12-22 10:28:58,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932296917] [2020-12-22 10:28:58,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:58,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:28:58,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:58,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 10:28:58,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:58,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:58,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-12-22 10:28:58,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677925432] [2020-12-22 10:28:58,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:28:58,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:58,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:28:58,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:28:58,630 INFO L87 Difference]: Start difference. First operand 79 states and 195 transitions. Second operand 9 states. [2020-12-22 10:28:58,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:58,692 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-12-22 10:28:58,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:28:58,693 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-22 10:28:58,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:58,694 INFO L225 Difference]: With dead ends: 95 [2020-12-22 10:28:58,694 INFO L226 Difference]: Without dead ends: 92 [2020-12-22 10:28:58,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:28:58,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-22 10:28:58,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-12-22 10:28:58,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 10:28:58,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 202 transitions. [2020-12-22 10:28:58,702 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 202 transitions. Word has length 9 [2020-12-22 10:28:58,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:58,702 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 202 transitions. [2020-12-22 10:28:58,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:28:58,703 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 202 transitions. [2020-12-22 10:28:58,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 10:28:58,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:58,704 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:58,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:58,918 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:58,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:58,919 INFO L82 PathProgramCache]: Analyzing trace with hash 293910732, now seen corresponding path program 5 times [2020-12-22 10:28:58,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:58,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607895193] [2020-12-22 10:28:58,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:58,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607895193] [2020-12-22 10:28:58,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927228704] [2020-12-22 10:28:58,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:59,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:59,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:59,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 10:28:59,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:59,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:59,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-12-22 10:28:59,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794467966] [2020-12-22 10:28:59,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:28:59,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:59,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:28:59,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:28:59,188 INFO L87 Difference]: Start difference. First operand 81 states and 202 transitions. Second operand 9 states. [2020-12-22 10:28:59,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:59,274 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2020-12-22 10:28:59,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:28:59,274 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-22 10:28:59,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:59,275 INFO L225 Difference]: With dead ends: 104 [2020-12-22 10:28:59,276 INFO L226 Difference]: Without dead ends: 98 [2020-12-22 10:28:59,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:28:59,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-22 10:28:59,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-12-22 10:28:59,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-22 10:28:59,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 206 transitions. [2020-12-22 10:28:59,283 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 206 transitions. Word has length 9 [2020-12-22 10:28:59,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:59,284 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 206 transitions. [2020-12-22 10:28:59,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:28:59,284 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 206 transitions. [2020-12-22 10:28:59,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 10:28:59,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:59,285 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:59,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:59,500 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:59,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:59,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1795907071, now seen corresponding path program 1 times [2020-12-22 10:28:59,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:59,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220902296] [2020-12-22 10:28:59,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:59,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:59,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220902296] [2020-12-22 10:28:59,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:28:59,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 10:28:59,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921913011] [2020-12-22 10:28:59,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:28:59,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:59,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:28:59,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:28:59,651 INFO L87 Difference]: Start difference. First operand 82 states and 206 transitions. Second operand 6 states. [2020-12-22 10:28:59,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:59,700 INFO L93 Difference]: Finished difference Result 101 states and 242 transitions. [2020-12-22 10:28:59,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:28:59,701 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 10:28:59,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:59,703 INFO L225 Difference]: With dead ends: 101 [2020-12-22 10:28:59,703 INFO L226 Difference]: Without dead ends: 99 [2020-12-22 10:28:59,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:28:59,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-22 10:28:59,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2020-12-22 10:28:59,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-22 10:28:59,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 216 transitions. [2020-12-22 10:28:59,729 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 216 transitions. Word has length 10 [2020-12-22 10:28:59,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:59,729 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 216 transitions. [2020-12-22 10:28:59,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:28:59,730 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 216 transitions. [2020-12-22 10:28:59,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 10:28:59,731 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:59,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:59,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:28:59,734 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:59,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:59,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1796275351, now seen corresponding path program 2 times [2020-12-22 10:28:59,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:59,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333132544] [2020-12-22 10:28:59,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:59,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:59,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333132544] [2020-12-22 10:28:59,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:28:59,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 10:28:59,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273457619] [2020-12-22 10:28:59,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:28:59,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:59,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:28:59,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:28:59,842 INFO L87 Difference]: Start difference. First operand 88 states and 216 transitions. Second operand 6 states. [2020-12-22 10:28:59,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:59,927 INFO L93 Difference]: Finished difference Result 116 states and 272 transitions. [2020-12-22 10:28:59,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:28:59,928 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 10:28:59,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:59,929 INFO L225 Difference]: With dead ends: 116 [2020-12-22 10:28:59,929 INFO L226 Difference]: Without dead ends: 111 [2020-12-22 10:28:59,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:28:59,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-22 10:28:59,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 87. [2020-12-22 10:28:59,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 10:28:59,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 214 transitions. [2020-12-22 10:28:59,936 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 214 transitions. Word has length 10 [2020-12-22 10:28:59,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:59,936 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 214 transitions. [2020-12-22 10:28:59,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:28:59,936 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 214 transitions. [2020-12-22 10:28:59,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 10:28:59,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:59,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:59,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:28:59,938 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:59,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:59,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1458823941, now seen corresponding path program 3 times [2020-12-22 10:28:59,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:59,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344357704] [2020-12-22 10:28:59,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:00,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344357704] [2020-12-22 10:29:00,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:29:00,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 10:29:00,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763765551] [2020-12-22 10:29:00,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:29:00,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:00,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:29:00,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:29:00,006 INFO L87 Difference]: Start difference. First operand 87 states and 214 transitions. Second operand 6 states. [2020-12-22 10:29:00,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:00,090 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-12-22 10:29:00,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:29:00,090 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 10:29:00,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:00,092 INFO L225 Difference]: With dead ends: 113 [2020-12-22 10:29:00,092 INFO L226 Difference]: Without dead ends: 108 [2020-12-22 10:29:00,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:29:00,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-22 10:29:00,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 88. [2020-12-22 10:29:00,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-22 10:29:00,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-12-22 10:29:00,097 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-12-22 10:29:00,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:00,097 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-12-22 10:29:00,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:29:00,097 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-12-22 10:29:00,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 10:29:00,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:00,098 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:00,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:29:00,098 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:00,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:00,099 INFO L82 PathProgramCache]: Analyzing trace with hash 166689468, now seen corresponding path program 6 times [2020-12-22 10:29:00,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:00,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665925993] [2020-12-22 10:29:00,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:00,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665925993] [2020-12-22 10:29:00,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678031312] [2020-12-22 10:29:00,182 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 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 [2020-12-22 10:29:00,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-22 10:29:00,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:00,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:29:00,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:00,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:00,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-12-22 10:29:00,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050002711] [2020-12-22 10:29:00,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:29:00,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:00,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:29:00,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:29:00,408 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 12 states. [2020-12-22 10:29:00,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:00,472 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-12-22 10:29:00,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:29:00,473 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-12-22 10:29:00,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:00,474 INFO L225 Difference]: With dead ends: 108 [2020-12-22 10:29:00,474 INFO L226 Difference]: Without dead ends: 105 [2020-12-22 10:29:00,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:29:00,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-22 10:29:00,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-12-22 10:29:00,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-22 10:29:00,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-12-22 10:29:00,479 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-12-22 10:29:00,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:00,480 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-12-22 10:29:00,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:29:00,480 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-12-22 10:29:00,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 10:29:00,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:00,481 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:00,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 10:29:00,697 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:00,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:00,698 INFO L82 PathProgramCache]: Analyzing trace with hash 520606548, now seen corresponding path program 7 times [2020-12-22 10:29:00,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:00,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239613925] [2020-12-22 10:29:00,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:00,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239613925] [2020-12-22 10:29:00,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491606693] [2020-12-22 10:29:00,800 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 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 [2020-12-22 10:29:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:00,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:29:00,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:00,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:00,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-12-22 10:29:00,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443330518] [2020-12-22 10:29:00,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:29:00,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:00,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:29:00,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:29:00,974 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 12 states. [2020-12-22 10:29:01,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:01,032 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-12-22 10:29:01,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:29:01,032 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-12-22 10:29:01,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:01,033 INFO L225 Difference]: With dead ends: 116 [2020-12-22 10:29:01,034 INFO L226 Difference]: Without dead ends: 113 [2020-12-22 10:29:01,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:29:01,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-22 10:29:01,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-12-22 10:29:01,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-22 10:29:01,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-12-22 10:29:01,039 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-12-22 10:29:01,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:01,039 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-12-22 10:29:01,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:29:01,039 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-12-22 10:29:01,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 10:29:01,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:01,040 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:01,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:01,255 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:01,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:01,256 INFO L82 PathProgramCache]: Analyzing trace with hash 521298468, now seen corresponding path program 8 times [2020-12-22 10:29:01,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:01,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871506647] [2020-12-22 10:29:01,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:01,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:01,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871506647] [2020-12-22 10:29:01,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688546868] [2020-12-22 10:29:01,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:01,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:01,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:01,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:29:01,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:01,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:01,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-12-22 10:29:01,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870819284] [2020-12-22 10:29:01,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:29:01,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:01,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:29:01,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:29:01,555 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 12 states. [2020-12-22 10:29:01,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:01,641 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-12-22 10:29:01,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:29:01,641 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-12-22 10:29:01,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:01,643 INFO L225 Difference]: With dead ends: 115 [2020-12-22 10:29:01,643 INFO L226 Difference]: Without dead ends: 112 [2020-12-22 10:29:01,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:29:01,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-22 10:29:01,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-12-22 10:29:01,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-22 10:29:01,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-12-22 10:29:01,648 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-12-22 10:29:01,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:01,649 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-12-22 10:29:01,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:29:01,649 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-12-22 10:29:01,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 10:29:01,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:01,650 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:01,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 10:29:01,864 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:01,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:01,865 INFO L82 PathProgramCache]: Analyzing trace with hash 521320788, now seen corresponding path program 9 times [2020-12-22 10:29:01,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:01,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259438515] [2020-12-22 10:29:01,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:01,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:01,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259438515] [2020-12-22 10:29:01,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571684221] [2020-12-22 10:29:01,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:02,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:29:02,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:02,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:29:02,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:02,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:02,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-22 10:29:02,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934620881] [2020-12-22 10:29:02,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:29:02,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:02,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:29:02,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:29:02,121 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-12-22 10:29:02,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:02,253 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-12-22 10:29:02,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 10:29:02,254 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-12-22 10:29:02,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:02,257 INFO L225 Difference]: With dead ends: 124 [2020-12-22 10:29:02,257 INFO L226 Difference]: Without dead ends: 118 [2020-12-22 10:29:02,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:29:02,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-22 10:29:02,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-12-22 10:29:02,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-22 10:29:02,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-12-22 10:29:02,266 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-12-22 10:29:02,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:02,267 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-12-22 10:29:02,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:29:02,267 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-12-22 10:29:02,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:29:02,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:02,268 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:02,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 10:29:02,479 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:02,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:02,480 INFO L82 PathProgramCache]: Analyzing trace with hash 913752204, now seen corresponding path program 3 times [2020-12-22 10:29:02,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:02,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279780698] [2020-12-22 10:29:02,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:02,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279780698] [2020-12-22 10:29:02,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386908903] [2020-12-22 10:29:02,620 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 [2020-12-22 10:29:02,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:29:02,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:02,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:29:02,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:02,807 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:02,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:02,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:02,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:29:02,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061397460] [2020-12-22 10:29:02,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:29:02,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:02,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:29:02,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:29:02,833 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 14 states. [2020-12-22 10:29:02,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:02,997 INFO L93 Difference]: Finished difference Result 161 states and 377 transitions. [2020-12-22 10:29:02,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:29:02,998 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-22 10:29:02,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:02,999 INFO L225 Difference]: With dead ends: 161 [2020-12-22 10:29:02,999 INFO L226 Difference]: Without dead ends: 153 [2020-12-22 10:29:03,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:29:03,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-22 10:29:03,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 104. [2020-12-22 10:29:03,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-22 10:29:03,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 264 transitions. [2020-12-22 10:29:03,005 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 264 transitions. Word has length 11 [2020-12-22 10:29:03,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:03,005 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 264 transitions. [2020-12-22 10:29:03,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:29:03,005 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 264 transitions. [2020-12-22 10:29:03,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:29:03,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:03,006 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:03,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 10:29:03,221 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:03,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:03,222 INFO L82 PathProgramCache]: Analyzing trace with hash 187063968, now seen corresponding path program 4 times [2020-12-22 10:29:03,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:03,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150841720] [2020-12-22 10:29:03,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:03,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150841720] [2020-12-22 10:29:03,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771284649] [2020-12-22 10:29:03,329 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 [2020-12-22 10:29:03,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:03,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:03,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:29:03,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:03,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:03,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:03,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-22 10:29:03,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088335482] [2020-12-22 10:29:03,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:29:03,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:03,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:29:03,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:29:03,489 INFO L87 Difference]: Start difference. First operand 104 states and 264 transitions. Second operand 11 states. [2020-12-22 10:29:03,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:03,576 INFO L93 Difference]: Finished difference Result 126 states and 306 transitions. [2020-12-22 10:29:03,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:29:03,576 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-22 10:29:03,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:03,578 INFO L225 Difference]: With dead ends: 126 [2020-12-22 10:29:03,578 INFO L226 Difference]: Without dead ends: 124 [2020-12-22 10:29:03,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:29:03,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-22 10:29:03,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2020-12-22 10:29:03,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-22 10:29:03,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 276 transitions. [2020-12-22 10:29:03,583 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 276 transitions. Word has length 11 [2020-12-22 10:29:03,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:03,584 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 276 transitions. [2020-12-22 10:29:03,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:29:03,584 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 276 transitions. [2020-12-22 10:29:03,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:29:03,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:03,585 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:03,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 10:29:03,799 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:03,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:03,800 INFO L82 PathProgramCache]: Analyzing trace with hash 187432248, now seen corresponding path program 5 times [2020-12-22 10:29:03,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:03,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200225317] [2020-12-22 10:29:03,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:03,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:03,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200225317] [2020-12-22 10:29:03,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96716834] [2020-12-22 10:29:03,882 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 [2020-12-22 10:29:03,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:03,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:03,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:29:03,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:04,038 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:29:04,042 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:29:04,046 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:04,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:04,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-12-22 10:29:04,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342251133] [2020-12-22 10:29:04,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:29:04,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:04,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:29:04,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:29:04,071 INFO L87 Difference]: Start difference. First operand 110 states and 276 transitions. Second operand 12 states. [2020-12-22 10:29:04,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:04,336 INFO L93 Difference]: Finished difference Result 172 states and 406 transitions. [2020-12-22 10:29:04,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:29:04,337 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2020-12-22 10:29:04,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:04,338 INFO L225 Difference]: With dead ends: 172 [2020-12-22 10:29:04,338 INFO L226 Difference]: Without dead ends: 160 [2020-12-22 10:29:04,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:29:04,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-22 10:29:04,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 107. [2020-12-22 10:29:04,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-22 10:29:04,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 275 transitions. [2020-12-22 10:29:04,344 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 275 transitions. Word has length 11 [2020-12-22 10:29:04,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:04,344 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 275 transitions. [2020-12-22 10:29:04,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:29:04,344 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 275 transitions. [2020-12-22 10:29:04,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:29:04,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:04,345 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:04,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 10:29:04,555 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:04,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:04,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1919347069, now seen corresponding path program 6 times [2020-12-22 10:29:04,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:04,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728750848] [2020-12-22 10:29:04,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:04,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728750848] [2020-12-22 10:29:04,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226741072] [2020-12-22 10:29:04,625 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 [2020-12-22 10:29:04,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-22 10:29:04,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:04,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:29:04,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:04,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:04,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-22 10:29:04,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113192393] [2020-12-22 10:29:04,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:29:04,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:04,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:29:04,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:29:04,800 INFO L87 Difference]: Start difference. First operand 107 states and 275 transitions. Second operand 11 states. [2020-12-22 10:29:04,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:04,898 INFO L93 Difference]: Finished difference Result 134 states and 329 transitions. [2020-12-22 10:29:04,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:29:04,899 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-22 10:29:04,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:04,900 INFO L225 Difference]: With dead ends: 134 [2020-12-22 10:29:04,900 INFO L226 Difference]: Without dead ends: 132 [2020-12-22 10:29:04,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:29:04,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-22 10:29:04,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 109. [2020-12-22 10:29:04,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-22 10:29:04,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 280 transitions. [2020-12-22 10:29:04,907 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 280 transitions. Word has length 11 [2020-12-22 10:29:04,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:04,907 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 280 transitions. [2020-12-22 10:29:04,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:29:04,907 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 280 transitions. [2020-12-22 10:29:04,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:29:04,908 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:04,909 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:05,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:05,125 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:05,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:05,126 INFO L82 PathProgramCache]: Analyzing trace with hash -2021703147, now seen corresponding path program 7 times [2020-12-22 10:29:05,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:05,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90013599] [2020-12-22 10:29:05,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:05,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:05,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90013599] [2020-12-22 10:29:05,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264210584] [2020-12-22 10:29:05,209 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 [2020-12-22 10:29:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:05,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:29:05,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:05,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:05,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:05,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-22 10:29:05,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792459291] [2020-12-22 10:29:05,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:29:05,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:05,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:29:05,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:29:05,409 INFO L87 Difference]: Start difference. First operand 109 states and 280 transitions. Second operand 11 states. [2020-12-22 10:29:05,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:05,518 INFO L93 Difference]: Finished difference Result 140 states and 340 transitions. [2020-12-22 10:29:05,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:29:05,519 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-22 10:29:05,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:05,521 INFO L225 Difference]: With dead ends: 140 [2020-12-22 10:29:05,521 INFO L226 Difference]: Without dead ends: 138 [2020-12-22 10:29:05,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:29:05,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-22 10:29:05,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 108. [2020-12-22 10:29:05,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-22 10:29:05,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 278 transitions. [2020-12-22 10:29:05,527 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 278 transitions. Word has length 11 [2020-12-22 10:29:05,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:05,527 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 278 transitions. [2020-12-22 10:29:05,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:29:05,527 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 278 transitions. [2020-12-22 10:29:05,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:29:05,528 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:05,528 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:05,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2020-12-22 10:29:05,744 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:05,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:05,745 INFO L82 PathProgramCache]: Analyzing trace with hash -2021097717, now seen corresponding path program 8 times [2020-12-22 10:29:05,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:05,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664452059] [2020-12-22 10:29:05,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:05,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:05,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664452059] [2020-12-22 10:29:05,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864437084] [2020-12-22 10:29:05,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 10:29:05,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:05,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:05,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:29:05,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:05,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:05,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:05,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-22 10:29:05,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497804735] [2020-12-22 10:29:05,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:29:05,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:05,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:29:05,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:29:05,992 INFO L87 Difference]: Start difference. First operand 108 states and 278 transitions. Second operand 11 states. [2020-12-22 10:29:06,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:06,120 INFO L93 Difference]: Finished difference Result 147 states and 350 transitions. [2020-12-22 10:29:06,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 10:29:06,121 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-22 10:29:06,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:06,122 INFO L225 Difference]: With dead ends: 147 [2020-12-22 10:29:06,123 INFO L226 Difference]: Without dead ends: 145 [2020-12-22 10:29:06,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:29:06,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-22 10:29:06,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 110. [2020-12-22 10:29:06,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-22 10:29:06,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 285 transitions. [2020-12-22 10:29:06,128 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 285 transitions. Word has length 11 [2020-12-22 10:29:06,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:06,129 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 285 transitions. [2020-12-22 10:29:06,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:29:06,129 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 285 transitions. [2020-12-22 10:29:06,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:29:06,130 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:06,130 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:06,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:06,344 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:06,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:06,345 INFO L82 PathProgramCache]: Analyzing trace with hash -2021078280, now seen corresponding path program 9 times [2020-12-22 10:29:06,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:06,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768430823] [2020-12-22 10:29:06,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:06,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768430823] [2020-12-22 10:29:06,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698044814] [2020-12-22 10:29:06,443 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 [2020-12-22 10:29:06,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:29:06,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:06,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:29:06,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:06,574 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:06,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:06,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-22 10:29:06,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152301408] [2020-12-22 10:29:06,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:29:06,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:06,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:29:06,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:29:06,585 INFO L87 Difference]: Start difference. First operand 110 states and 285 transitions. Second operand 11 states. [2020-12-22 10:29:06,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:06,779 INFO L93 Difference]: Finished difference Result 156 states and 376 transitions. [2020-12-22 10:29:06,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:29:06,780 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-22 10:29:06,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:06,781 INFO L225 Difference]: With dead ends: 156 [2020-12-22 10:29:06,781 INFO L226 Difference]: Without dead ends: 148 [2020-12-22 10:29:06,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:29:06,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-12-22 10:29:06,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 110. [2020-12-22 10:29:06,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-22 10:29:06,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 285 transitions. [2020-12-22 10:29:06,788 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 285 transitions. Word has length 11 [2020-12-22 10:29:06,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:06,788 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 285 transitions. [2020-12-22 10:29:06,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:29:06,788 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 285 transitions. [2020-12-22 10:29:06,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:29:06,789 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:06,789 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:07,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 10:29:07,004 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:07,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:07,005 INFO L82 PathProgramCache]: Analyzing trace with hash -2021075397, now seen corresponding path program 10 times [2020-12-22 10:29:07,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:07,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312852785] [2020-12-22 10:29:07,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:07,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:07,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312852785] [2020-12-22 10:29:07,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667993953] [2020-12-22 10:29:07,077 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 [2020-12-22 10:29:07,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:07,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:07,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:29:07,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:07,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:07,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-12-22 10:29:07,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279921355] [2020-12-22 10:29:07,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:29:07,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:07,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:29:07,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:29:07,221 INFO L87 Difference]: Start difference. First operand 110 states and 285 transitions. Second operand 12 states. [2020-12-22 10:29:07,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:07,528 INFO L93 Difference]: Finished difference Result 184 states and 438 transitions. [2020-12-22 10:29:07,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:29:07,529 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2020-12-22 10:29:07,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:07,530 INFO L225 Difference]: With dead ends: 184 [2020-12-22 10:29:07,530 INFO L226 Difference]: Without dead ends: 172 [2020-12-22 10:29:07,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:29:07,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-22 10:29:07,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 108. [2020-12-22 10:29:07,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-22 10:29:07,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 276 transitions. [2020-12-22 10:29:07,536 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 276 transitions. Word has length 11 [2020-12-22 10:29:07,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:07,536 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 276 transitions. [2020-12-22 10:29:07,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:29:07,536 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 276 transitions. [2020-12-22 10:29:07,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:29:07,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:07,537 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:07,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:07,751 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:07,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:07,752 INFO L82 PathProgramCache]: Analyzing trace with hash 872406580, now seen corresponding path program 10 times [2020-12-22 10:29:07,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:07,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306788701] [2020-12-22 10:29:07,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:07,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306788701] [2020-12-22 10:29:07,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517755517] [2020-12-22 10:29:07,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 10:29:07,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:07,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:07,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:29:07,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:08,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:08,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 10:29:08,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731015724] [2020-12-22 10:29:08,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:29:08,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:08,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:29:08,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:29:08,022 INFO L87 Difference]: Start difference. First operand 108 states and 276 transitions. Second operand 13 states. [2020-12-22 10:29:08,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:08,069 INFO L93 Difference]: Finished difference Result 133 states and 328 transitions. [2020-12-22 10:29:08,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:29:08,070 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-12-22 10:29:08,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:08,071 INFO L225 Difference]: With dead ends: 133 [2020-12-22 10:29:08,071 INFO L226 Difference]: Without dead ends: 130 [2020-12-22 10:29:08,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:29:08,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-22 10:29:08,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 112. [2020-12-22 10:29:08,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-22 10:29:08,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 284 transitions. [2020-12-22 10:29:08,077 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 284 transitions. Word has length 11 [2020-12-22 10:29:08,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:08,077 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 284 transitions. [2020-12-22 10:29:08,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:29:08,077 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 284 transitions. [2020-12-22 10:29:08,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:29:08,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:08,078 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:08,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 10:29:08,283 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:08,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:08,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1041065828, now seen corresponding path program 11 times [2020-12-22 10:29:08,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:08,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5434719] [2020-12-22 10:29:08,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:08,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5434719] [2020-12-22 10:29:08,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904695135] [2020-12-22 10:29:08,378 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 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 [2020-12-22 10:29:08,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:29:08,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:08,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:29:08,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:08,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:08,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 10:29:08,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783899936] [2020-12-22 10:29:08,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:29:08,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:08,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:29:08,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:29:08,554 INFO L87 Difference]: Start difference. First operand 112 states and 284 transitions. Second operand 13 states. [2020-12-22 10:29:08,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:08,617 INFO L93 Difference]: Finished difference Result 144 states and 349 transitions. [2020-12-22 10:29:08,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:29:08,618 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-12-22 10:29:08,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:08,619 INFO L225 Difference]: With dead ends: 144 [2020-12-22 10:29:08,620 INFO L226 Difference]: Without dead ends: 141 [2020-12-22 10:29:08,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:29:08,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-22 10:29:08,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 112. [2020-12-22 10:29:08,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-22 10:29:08,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 284 transitions. [2020-12-22 10:29:08,625 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 284 transitions. Word has length 11 [2020-12-22 10:29:08,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:08,625 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 284 transitions. [2020-12-22 10:29:08,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:29:08,626 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 284 transitions. [2020-12-22 10:29:08,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:29:08,626 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:08,626 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:08,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 10:29:08,840 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:08,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:08,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1019616308, now seen corresponding path program 12 times [2020-12-22 10:29:08,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:08,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332307640] [2020-12-22 10:29:08,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:08,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332307640] [2020-12-22 10:29:08,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427982340] [2020-12-22 10:29:08,942 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 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 [2020-12-22 10:29:09,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:29:09,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:09,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:29:09,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:09,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:09,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 10:29:09,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399385814] [2020-12-22 10:29:09,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:29:09,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:09,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:29:09,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:29:09,113 INFO L87 Difference]: Start difference. First operand 112 states and 284 transitions. Second operand 13 states. [2020-12-22 10:29:09,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:09,194 INFO L93 Difference]: Finished difference Result 143 states and 349 transitions. [2020-12-22 10:29:09,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:29:09,195 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-12-22 10:29:09,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:09,196 INFO L225 Difference]: With dead ends: 143 [2020-12-22 10:29:09,196 INFO L226 Difference]: Without dead ends: 140 [2020-12-22 10:29:09,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:29:09,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-22 10:29:09,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 114. [2020-12-22 10:29:09,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-12-22 10:29:09,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 291 transitions. [2020-12-22 10:29:09,201 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 291 transitions. Word has length 11 [2020-12-22 10:29:09,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:09,201 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 291 transitions. [2020-12-22 10:29:09,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:29:09,201 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 291 transitions. [2020-12-22 10:29:09,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:29:09,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:09,202 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:09,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 10:29:09,416 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:09,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:09,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1018924388, now seen corresponding path program 13 times [2020-12-22 10:29:09,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:09,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134121287] [2020-12-22 10:29:09,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:09,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134121287] [2020-12-22 10:29:09,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459515242] [2020-12-22 10:29:09,498 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 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 [2020-12-22 10:29:09,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:09,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:29:09,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:09,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:09,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:09,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 10:29:09,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662704777] [2020-12-22 10:29:09,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:29:09,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:09,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:29:09,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:29:09,677 INFO L87 Difference]: Start difference. First operand 114 states and 291 transitions. Second operand 13 states. [2020-12-22 10:29:09,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:09,822 INFO L93 Difference]: Finished difference Result 142 states and 349 transitions. [2020-12-22 10:29:09,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 10:29:09,824 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-12-22 10:29:09,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:09,825 INFO L225 Difference]: With dead ends: 142 [2020-12-22 10:29:09,825 INFO L226 Difference]: Without dead ends: 139 [2020-12-22 10:29:09,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:09,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-22 10:29:09,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 116. [2020-12-22 10:29:09,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-22 10:29:09,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 298 transitions. [2020-12-22 10:29:09,831 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 298 transitions. Word has length 11 [2020-12-22 10:29:09,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:09,831 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 298 transitions. [2020-12-22 10:29:09,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:29:09,831 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 298 transitions. [2020-12-22 10:29:09,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:29:09,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:09,832 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:10,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 10:29:10,047 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:10,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:10,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1018902068, now seen corresponding path program 14 times [2020-12-22 10:29:10,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:10,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787248562] [2020-12-22 10:29:10,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:10,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:10,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:10,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787248562] [2020-12-22 10:29:10,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220128038] [2020-12-22 10:29:10,149 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 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 [2020-12-22 10:29:10,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:10,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:10,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:29:10,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:10,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:10,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:29:10,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923035870] [2020-12-22 10:29:10,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:29:10,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:10,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:29:10,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:29:10,355 INFO L87 Difference]: Start difference. First operand 116 states and 298 transitions. Second operand 14 states. [2020-12-22 10:29:10,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:10,610 INFO L93 Difference]: Finished difference Result 167 states and 411 transitions. [2020-12-22 10:29:10,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:29:10,611 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-22 10:29:10,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:10,612 INFO L225 Difference]: With dead ends: 167 [2020-12-22 10:29:10,613 INFO L226 Difference]: Without dead ends: 155 [2020-12-22 10:29:10,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:29:10,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-22 10:29:10,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-12-22 10:29:10,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-22 10:29:10,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 315 transitions. [2020-12-22 10:29:10,618 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 315 transitions. Word has length 11 [2020-12-22 10:29:10,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:10,618 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 315 transitions. [2020-12-22 10:29:10,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:29:10,618 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 315 transitions. [2020-12-22 10:29:10,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:29:10,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:10,619 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:10,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 10:29:10,833 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:10,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:10,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1852535327, now seen corresponding path program 11 times [2020-12-22 10:29:10,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:10,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365445717] [2020-12-22 10:29:10,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:10,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:10,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365445717] [2020-12-22 10:29:10,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639493327] [2020-12-22 10:29:10,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:11,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:11,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:11,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:29:11,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:11,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:11,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:29:11,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276026185] [2020-12-22 10:29:11,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:29:11,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:11,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:29:11,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:29:11,154 INFO L87 Difference]: Start difference. First operand 121 states and 315 transitions. Second operand 14 states. [2020-12-22 10:29:11,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:11,283 INFO L93 Difference]: Finished difference Result 155 states and 375 transitions. [2020-12-22 10:29:11,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 10:29:11,286 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-22 10:29:11,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:11,288 INFO L225 Difference]: With dead ends: 155 [2020-12-22 10:29:11,288 INFO L226 Difference]: Without dead ends: 153 [2020-12-22 10:29:11,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:11,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-22 10:29:11,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 128. [2020-12-22 10:29:11,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-22 10:29:11,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 328 transitions. [2020-12-22 10:29:11,296 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 328 transitions. Word has length 12 [2020-12-22 10:29:11,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:11,297 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 328 transitions. [2020-12-22 10:29:11,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:29:11,297 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 328 transitions. [2020-12-22 10:29:11,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:29:11,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:11,299 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:11,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:11,512 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:11,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:11,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1852903607, now seen corresponding path program 12 times [2020-12-22 10:29:11,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:11,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148507702] [2020-12-22 10:29:11,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:11,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:11,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148507702] [2020-12-22 10:29:11,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919133983] [2020-12-22 10:29:11,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:11,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-22 10:29:11,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:11,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:29:11,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:11,781 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:29:11,784 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:29:11,786 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:11,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:11,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 10:29:11,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014701137] [2020-12-22 10:29:11,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:29:11,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:11,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:29:11,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:29:11,800 INFO L87 Difference]: Start difference. First operand 128 states and 328 transitions. Second operand 13 states. [2020-12-22 10:29:12,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:12,096 INFO L93 Difference]: Finished difference Result 186 states and 449 transitions. [2020-12-22 10:29:12,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:29:12,097 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-22 10:29:12,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:12,098 INFO L225 Difference]: With dead ends: 186 [2020-12-22 10:29:12,098 INFO L226 Difference]: Without dead ends: 178 [2020-12-22 10:29:12,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:29:12,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-22 10:29:12,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 127. [2020-12-22 10:29:12,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-22 10:29:12,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 326 transitions. [2020-12-22 10:29:12,105 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 326 transitions. Word has length 12 [2020-12-22 10:29:12,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:12,105 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 326 transitions. [2020-12-22 10:29:12,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:29:12,105 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 326 transitions. [2020-12-22 10:29:12,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:29:12,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:12,106 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:12,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:12,320 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:12,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:12,321 INFO L82 PathProgramCache]: Analyzing trace with hash -710148868, now seen corresponding path program 13 times [2020-12-22 10:29:12,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:12,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045305057] [2020-12-22 10:29:12,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:12,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:12,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045305057] [2020-12-22 10:29:12,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500291541] [2020-12-22 10:29:12,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:12,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:12,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:29:12,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:12,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:12,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:12,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:29:12,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513111922] [2020-12-22 10:29:12,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:29:12,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:12,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:29:12,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:29:12,619 INFO L87 Difference]: Start difference. First operand 127 states and 326 transitions. Second operand 14 states. [2020-12-22 10:29:12,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:12,808 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-12-22 10:29:12,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 10:29:12,809 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-22 10:29:12,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:12,810 INFO L225 Difference]: With dead ends: 172 [2020-12-22 10:29:12,811 INFO L226 Difference]: Without dead ends: 170 [2020-12-22 10:29:12,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:29:12,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-22 10:29:12,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-12-22 10:29:12,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-22 10:29:12,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 333 transitions. [2020-12-22 10:29:12,817 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 333 transitions. Word has length 12 [2020-12-22 10:29:12,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:12,817 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 333 transitions. [2020-12-22 10:29:12,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:29:12,817 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 333 transitions. [2020-12-22 10:29:12,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:29:12,818 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:12,818 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:13,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:13,032 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:13,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:13,033 INFO L82 PathProgramCache]: Analyzing trace with hash -356231788, now seen corresponding path program 14 times [2020-12-22 10:29:13,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:13,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281863185] [2020-12-22 10:29:13,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:13,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281863185] [2020-12-22 10:29:13,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476900072] [2020-12-22 10:29:13,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:13,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:13,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:13,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:29:13,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:13,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:13,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:13,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:29:13,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729181226] [2020-12-22 10:29:13,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:29:13,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:13,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:29:13,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:29:13,343 INFO L87 Difference]: Start difference. First operand 132 states and 333 transitions. Second operand 14 states. [2020-12-22 10:29:13,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:13,605 INFO L93 Difference]: Finished difference Result 186 states and 440 transitions. [2020-12-22 10:29:13,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:29:13,606 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-22 10:29:13,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:13,608 INFO L225 Difference]: With dead ends: 186 [2020-12-22 10:29:13,608 INFO L226 Difference]: Without dead ends: 184 [2020-12-22 10:29:13,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:29:13,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-12-22 10:29:13,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 134. [2020-12-22 10:29:13,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-22 10:29:13,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 340 transitions. [2020-12-22 10:29:13,614 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 340 transitions. Word has length 12 [2020-12-22 10:29:13,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:13,614 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 340 transitions. [2020-12-22 10:29:13,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:29:13,614 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 340 transitions. [2020-12-22 10:29:13,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:29:13,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:13,615 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:13,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-22 10:29:13,830 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:13,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:13,831 INFO L82 PathProgramCache]: Analyzing trace with hash -355626358, now seen corresponding path program 15 times [2020-12-22 10:29:13,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:13,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424094648] [2020-12-22 10:29:13,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:13,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:13,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:13,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424094648] [2020-12-22 10:29:13,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832244064] [2020-12-22 10:29:13,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 10:29:13,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:29:13,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:14,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:29:14,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:14,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:14,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:29:14,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723480451] [2020-12-22 10:29:14,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:29:14,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:14,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:29:14,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:29:14,134 INFO L87 Difference]: Start difference. First operand 134 states and 340 transitions. Second operand 14 states. [2020-12-22 10:29:14,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:14,405 INFO L93 Difference]: Finished difference Result 182 states and 437 transitions. [2020-12-22 10:29:14,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:29:14,405 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-22 10:29:14,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:14,406 INFO L225 Difference]: With dead ends: 182 [2020-12-22 10:29:14,406 INFO L226 Difference]: Without dead ends: 180 [2020-12-22 10:29:14,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:29:14,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-12-22 10:29:14,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 136. [2020-12-22 10:29:14,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-22 10:29:14,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 347 transitions. [2020-12-22 10:29:14,412 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 347 transitions. Word has length 12 [2020-12-22 10:29:14,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:14,413 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 347 transitions. [2020-12-22 10:29:14,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:29:14,413 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 347 transitions. [2020-12-22 10:29:14,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:29:14,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:14,414 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:14,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:14,629 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:14,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:14,629 INFO L82 PathProgramCache]: Analyzing trace with hash -355606921, now seen corresponding path program 16 times [2020-12-22 10:29:14,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:14,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637123026] [2020-12-22 10:29:14,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:14,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637123026] [2020-12-22 10:29:14,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654206497] [2020-12-22 10:29:14,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:14,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:14,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:14,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:29:14,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:14,898 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:14,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:14,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 10:29:14,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056315666] [2020-12-22 10:29:14,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:29:14,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:14,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:29:14,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:29:14,911 INFO L87 Difference]: Start difference. First operand 136 states and 347 transitions. Second operand 13 states. [2020-12-22 10:29:15,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:15,302 INFO L93 Difference]: Finished difference Result 196 states and 476 transitions. [2020-12-22 10:29:15,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:29:15,302 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-22 10:29:15,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:15,304 INFO L225 Difference]: With dead ends: 196 [2020-12-22 10:29:15,304 INFO L226 Difference]: Without dead ends: 188 [2020-12-22 10:29:15,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:29:15,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-22 10:29:15,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 137. [2020-12-22 10:29:15,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-22 10:29:15,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 352 transitions. [2020-12-22 10:29:15,310 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 352 transitions. Word has length 12 [2020-12-22 10:29:15,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:15,311 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 352 transitions. [2020-12-22 10:29:15,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:29:15,311 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 352 transitions. [2020-12-22 10:29:15,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:29:15,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:15,312 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:15,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 10:29:15,527 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:15,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:15,527 INFO L82 PathProgramCache]: Analyzing trace with hash -355604038, now seen corresponding path program 17 times [2020-12-22 10:29:15,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:15,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941573905] [2020-12-22 10:29:15,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:15,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:15,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941573905] [2020-12-22 10:29:15,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922981282] [2020-12-22 10:29:15,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:15,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:15,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:15,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:29:15,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:15,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:15,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 10:29:15,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493130118] [2020-12-22 10:29:15,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:29:15,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:15,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:29:15,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:29:15,783 INFO L87 Difference]: Start difference. First operand 137 states and 352 transitions. Second operand 13 states. [2020-12-22 10:29:16,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:16,236 INFO L93 Difference]: Finished difference Result 200 states and 481 transitions. [2020-12-22 10:29:16,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:29:16,237 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-22 10:29:16,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:16,239 INFO L225 Difference]: With dead ends: 200 [2020-12-22 10:29:16,239 INFO L226 Difference]: Without dead ends: 192 [2020-12-22 10:29:16,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:29:16,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-12-22 10:29:16,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 131. [2020-12-22 10:29:16,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-22 10:29:16,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 331 transitions. [2020-12-22 10:29:16,245 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 331 transitions. Word has length 12 [2020-12-22 10:29:16,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:16,245 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 331 transitions. [2020-12-22 10:29:16,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:29:16,245 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 331 transitions. [2020-12-22 10:29:16,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:29:16,246 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:16,246 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:16,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:16,458 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:16,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:16,459 INFO L82 PathProgramCache]: Analyzing trace with hash -629785520, now seen corresponding path program 18 times [2020-12-22 10:29:16,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:16,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856717813] [2020-12-22 10:29:16,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:16,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:16,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856717813] [2020-12-22 10:29:16,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366061699] [2020-12-22 10:29:16,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:16,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:29:16,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:16,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:29:16,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:16,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:16,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:16,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:29:16,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688691418] [2020-12-22 10:29:16,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:29:16,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:16,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:29:16,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:29:16,768 INFO L87 Difference]: Start difference. First operand 131 states and 331 transitions. Second operand 14 states. [2020-12-22 10:29:16,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:16,918 INFO L93 Difference]: Finished difference Result 167 states and 404 transitions. [2020-12-22 10:29:16,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:29:16,919 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-22 10:29:16,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:16,920 INFO L225 Difference]: With dead ends: 167 [2020-12-22 10:29:16,920 INFO L226 Difference]: Without dead ends: 165 [2020-12-22 10:29:16,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:29:16,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-22 10:29:16,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 135. [2020-12-22 10:29:16,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-22 10:29:16,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 341 transitions. [2020-12-22 10:29:16,925 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 341 transitions. Word has length 12 [2020-12-22 10:29:16,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:16,926 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 341 transitions. [2020-12-22 10:29:16,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:29:16,926 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 341 transitions. [2020-12-22 10:29:16,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:29:16,927 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:16,927 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:17,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 10:29:17,142 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:17,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:17,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1751709368, now seen corresponding path program 19 times [2020-12-22 10:29:17,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:17,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145293681] [2020-12-22 10:29:17,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:17,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145293681] [2020-12-22 10:29:17,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209961731] [2020-12-22 10:29:17,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:17,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:29:17,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:17,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:17,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:17,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:29:17,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315020614] [2020-12-22 10:29:17,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:29:17,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:17,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:29:17,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:29:17,420 INFO L87 Difference]: Start difference. First operand 135 states and 341 transitions. Second operand 14 states. [2020-12-22 10:29:17,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:17,604 INFO L93 Difference]: Finished difference Result 176 states and 422 transitions. [2020-12-22 10:29:17,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:29:17,605 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-22 10:29:17,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:17,606 INFO L225 Difference]: With dead ends: 176 [2020-12-22 10:29:17,606 INFO L226 Difference]: Without dead ends: 174 [2020-12-22 10:29:17,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:29:17,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-22 10:29:17,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 133. [2020-12-22 10:29:17,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-22 10:29:17,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 336 transitions. [2020-12-22 10:29:17,613 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 336 transitions. Word has length 12 [2020-12-22 10:29:17,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:17,614 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 336 transitions. [2020-12-22 10:29:17,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:29:17,614 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 336 transitions. [2020-12-22 10:29:17,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:29:17,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:17,615 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:17,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:17,828 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:17,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:17,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1770477698, now seen corresponding path program 20 times [2020-12-22 10:29:17,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:17,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634318962] [2020-12-22 10:29:17,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:17,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:17,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634318962] [2020-12-22 10:29:17,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777365609] [2020-12-22 10:29:17,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:17,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:17,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:17,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:29:17,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:18,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:18,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:18,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:29:18,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183000543] [2020-12-22 10:29:18,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:29:18,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:18,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:29:18,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:29:18,117 INFO L87 Difference]: Start difference. First operand 133 states and 336 transitions. Second operand 14 states. [2020-12-22 10:29:18,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:18,343 INFO L93 Difference]: Finished difference Result 181 states and 428 transitions. [2020-12-22 10:29:18,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:29:18,346 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-22 10:29:18,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:18,347 INFO L225 Difference]: With dead ends: 181 [2020-12-22 10:29:18,348 INFO L226 Difference]: Without dead ends: 179 [2020-12-22 10:29:18,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:29:18,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-12-22 10:29:18,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 131. [2020-12-22 10:29:18,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-22 10:29:18,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 331 transitions. [2020-12-22 10:29:18,353 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 331 transitions. Word has length 12 [2020-12-22 10:29:18,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:18,353 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 331 transitions. [2020-12-22 10:29:18,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:29:18,353 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 331 transitions. [2020-12-22 10:29:18,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:29:18,354 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:18,354 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:18,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 10:29:18,570 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:18,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:18,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1771083128, now seen corresponding path program 21 times [2020-12-22 10:29:18,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:18,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397083703] [2020-12-22 10:29:18,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:18,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:18,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397083703] [2020-12-22 10:29:18,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720709625] [2020-12-22 10:29:18,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:18,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:29:18,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:18,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:29:18,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:18,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:18,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 10:29:18,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039075882] [2020-12-22 10:29:18,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:29:18,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:18,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:29:18,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:29:18,833 INFO L87 Difference]: Start difference. First operand 131 states and 331 transitions. Second operand 13 states. [2020-12-22 10:29:19,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:19,115 INFO L93 Difference]: Finished difference Result 184 states and 442 transitions. [2020-12-22 10:29:19,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:29:19,116 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-22 10:29:19,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:19,117 INFO L225 Difference]: With dead ends: 184 [2020-12-22 10:29:19,119 INFO L226 Difference]: Without dead ends: 182 [2020-12-22 10:29:19,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:29:19,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-22 10:29:19,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 134. [2020-12-22 10:29:19,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-22 10:29:19,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 343 transitions. [2020-12-22 10:29:19,126 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 343 transitions. Word has length 12 [2020-12-22 10:29:19,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:19,126 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 343 transitions. [2020-12-22 10:29:19,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:29:19,127 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 343 transitions. [2020-12-22 10:29:19,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:29:19,127 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:19,128 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:19,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 10:29:19,341 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:19,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:19,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1771105448, now seen corresponding path program 22 times [2020-12-22 10:29:19,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:19,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271208835] [2020-12-22 10:29:19,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:19,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:19,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:19,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271208835] [2020-12-22 10:29:19,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837287396] [2020-12-22 10:29:19,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:19,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:19,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:19,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:29:19,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:19,577 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:29:19,581 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:29:19,583 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:19,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:19,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 10:29:19,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989870386] [2020-12-22 10:29:19,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:29:19,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:19,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:29:19,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:29:19,596 INFO L87 Difference]: Start difference. First operand 134 states and 343 transitions. Second operand 13 states. [2020-12-22 10:29:20,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:20,035 INFO L93 Difference]: Finished difference Result 196 states and 473 transitions. [2020-12-22 10:29:20,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:29:20,036 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-22 10:29:20,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:20,037 INFO L225 Difference]: With dead ends: 196 [2020-12-22 10:29:20,037 INFO L226 Difference]: Without dead ends: 188 [2020-12-22 10:29:20,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-12-22 10:29:20,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-22 10:29:20,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 132. [2020-12-22 10:29:20,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-22 10:29:20,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 336 transitions. [2020-12-22 10:29:20,044 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 336 transitions. Word has length 12 [2020-12-22 10:29:20,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:20,044 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 336 transitions. [2020-12-22 10:29:20,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:29:20,044 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 336 transitions. [2020-12-22 10:29:20,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:29:20,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:20,045 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:20,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 10:29:20,251 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:20,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:20,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1773962501, now seen corresponding path program 23 times [2020-12-22 10:29:20,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:20,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659433498] [2020-12-22 10:29:20,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:20,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:20,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659433498] [2020-12-22 10:29:20,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900232040] [2020-12-22 10:29:20,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:20,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:20,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:20,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:29:20,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:20,513 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:20,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:20,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:20,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:29:20,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54433301] [2020-12-22 10:29:20,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:29:20,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:20,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:29:20,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:29:20,538 INFO L87 Difference]: Start difference. First operand 132 states and 336 transitions. Second operand 14 states. [2020-12-22 10:29:20,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:20,891 INFO L93 Difference]: Finished difference Result 214 states and 506 transitions. [2020-12-22 10:29:20,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:29:20,892 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-22 10:29:20,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:20,893 INFO L225 Difference]: With dead ends: 214 [2020-12-22 10:29:20,893 INFO L226 Difference]: Without dead ends: 202 [2020-12-22 10:29:20,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:29:20,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-22 10:29:20,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 131. [2020-12-22 10:29:20,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-22 10:29:20,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 333 transitions. [2020-12-22 10:29:20,900 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 333 transitions. Word has length 12 [2020-12-22 10:29:20,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:20,900 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 333 transitions. [2020-12-22 10:29:20,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:29:20,901 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 333 transitions. [2020-12-22 10:29:20,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:20,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:20,901 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:21,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-22 10:29:21,117 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:21,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:21,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1625739156, now seen corresponding path program 4 times [2020-12-22 10:29:21,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:21,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720385805] [2020-12-22 10:29:21,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:21,225 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:21,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720385805] [2020-12-22 10:29:21,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566588378] [2020-12-22 10:29:21,225 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 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 [2020-12-22 10:29:21,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:21,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:21,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:21,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:21,444 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:21,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:21,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:29:21,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741305741] [2020-12-22 10:29:21,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:29:21,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:21,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:29:21,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:29:21,475 INFO L87 Difference]: Start difference. First operand 131 states and 333 transitions. Second operand 18 states. [2020-12-22 10:29:21,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:21,721 INFO L93 Difference]: Finished difference Result 208 states and 504 transitions. [2020-12-22 10:29:21,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:29:21,722 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-12-22 10:29:21,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:21,724 INFO L225 Difference]: With dead ends: 208 [2020-12-22 10:29:21,724 INFO L226 Difference]: Without dead ends: 200 [2020-12-22 10:29:21,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:29:21,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-22 10:29:21,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-12-22 10:29:21,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-12-22 10:29:21,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 375 transitions. [2020-12-22 10:29:21,731 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 375 transitions. Word has length 13 [2020-12-22 10:29:21,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:21,731 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 375 transitions. [2020-12-22 10:29:21,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:29:21,731 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 375 transitions. [2020-12-22 10:29:21,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:21,732 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:21,732 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:21,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:21,947 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:21,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:21,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1942539904, now seen corresponding path program 24 times [2020-12-22 10:29:21,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:21,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72110058] [2020-12-22 10:29:21,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:22,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72110058] [2020-12-22 10:29:22,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859950341] [2020-12-22 10:29:22,067 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 [2020-12-22 10:29:22,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:29:22,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:22,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:22,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:22,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:22,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:22,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613030669] [2020-12-22 10:29:22,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:22,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:22,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:22,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:22,312 INFO L87 Difference]: Start difference. First operand 143 states and 375 transitions. Second operand 16 states. [2020-12-22 10:29:22,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:22,446 INFO L93 Difference]: Finished difference Result 175 states and 435 transitions. [2020-12-22 10:29:22,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:29:22,447 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:22,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:22,448 INFO L225 Difference]: With dead ends: 175 [2020-12-22 10:29:22,448 INFO L226 Difference]: Without dead ends: 173 [2020-12-22 10:29:22,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:29:22,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-12-22 10:29:22,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 150. [2020-12-22 10:29:22,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-22 10:29:22,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 390 transitions. [2020-12-22 10:29:22,454 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 390 transitions. Word has length 13 [2020-12-22 10:29:22,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:22,454 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 390 transitions. [2020-12-22 10:29:22,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:22,454 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 390 transitions. [2020-12-22 10:29:22,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:22,455 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:22,455 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:22,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-22 10:29:22,669 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:22,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:22,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1942908184, now seen corresponding path program 25 times [2020-12-22 10:29:22,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:22,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618994116] [2020-12-22 10:29:22,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:22,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618994116] [2020-12-22 10:29:22,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625195838] [2020-12-22 10:29:22,771 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 [2020-12-22 10:29:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:22,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:22,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:22,981 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:29:22,988 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:29:22,991 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:23,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:23,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:23,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:23,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798141838] [2020-12-22 10:29:23,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:23,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:23,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:23,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:23,017 INFO L87 Difference]: Start difference. First operand 150 states and 390 transitions. Second operand 16 states. [2020-12-22 10:29:23,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:23,471 INFO L93 Difference]: Finished difference Result 240 states and 578 transitions. [2020-12-22 10:29:23,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:29:23,472 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:23,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:23,474 INFO L225 Difference]: With dead ends: 240 [2020-12-22 10:29:23,474 INFO L226 Difference]: Without dead ends: 228 [2020-12-22 10:29:23,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-12-22 10:29:23,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-12-22 10:29:23,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 143. [2020-12-22 10:29:23,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-12-22 10:29:23,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 382 transitions. [2020-12-22 10:29:23,484 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 382 transitions. Word has length 13 [2020-12-22 10:29:23,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:23,484 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 382 transitions. [2020-12-22 10:29:23,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:23,484 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 382 transitions. [2020-12-22 10:29:23,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:23,485 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:23,485 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:23,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-22 10:29:23,688 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:23,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:23,688 INFO L82 PathProgramCache]: Analyzing trace with hash -620144291, now seen corresponding path program 26 times [2020-12-22 10:29:23,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:23,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898802008] [2020-12-22 10:29:23,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:23,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:23,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898802008] [2020-12-22 10:29:23,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341288314] [2020-12-22 10:29:23,795 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 [2020-12-22 10:29:23,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:23,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:23,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:23,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:24,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:24,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:24,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:24,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729497617] [2020-12-22 10:29:24,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:24,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:24,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:24,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:24,069 INFO L87 Difference]: Start difference. First operand 143 states and 382 transitions. Second operand 16 states. [2020-12-22 10:29:24,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:24,372 INFO L93 Difference]: Finished difference Result 200 states and 491 transitions. [2020-12-22 10:29:24,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:29:24,373 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:24,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:24,375 INFO L225 Difference]: With dead ends: 200 [2020-12-22 10:29:24,375 INFO L226 Difference]: Without dead ends: 198 [2020-12-22 10:29:24,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:29:24,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-12-22 10:29:24,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 147. [2020-12-22 10:29:24,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-22 10:29:24,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 388 transitions. [2020-12-22 10:29:24,381 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 388 transitions. Word has length 13 [2020-12-22 10:29:24,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:24,381 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 388 transitions. [2020-12-22 10:29:24,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:24,382 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 388 transitions. [2020-12-22 10:29:24,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:24,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:24,382 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:24,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:24,598 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:24,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:24,599 INFO L82 PathProgramCache]: Analyzing trace with hash -266227211, now seen corresponding path program 27 times [2020-12-22 10:29:24,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:24,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236774666] [2020-12-22 10:29:24,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:24,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:24,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:24,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236774666] [2020-12-22 10:29:24,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352844218] [2020-12-22 10:29:24,690 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 [2020-12-22 10:29:24,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:29:24,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:24,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:24,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:24,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:24,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:24,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:24,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373714956] [2020-12-22 10:29:24,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:24,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:24,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:24,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:24,953 INFO L87 Difference]: Start difference. First operand 147 states and 388 transitions. Second operand 16 states. [2020-12-22 10:29:25,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:25,290 INFO L93 Difference]: Finished difference Result 213 states and 514 transitions. [2020-12-22 10:29:25,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:29:25,291 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:25,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:25,292 INFO L225 Difference]: With dead ends: 213 [2020-12-22 10:29:25,292 INFO L226 Difference]: Without dead ends: 211 [2020-12-22 10:29:25,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:29:25,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-12-22 10:29:25,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 149. [2020-12-22 10:29:25,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-12-22 10:29:25,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 395 transitions. [2020-12-22 10:29:25,298 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 395 transitions. Word has length 13 [2020-12-22 10:29:25,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:25,298 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 395 transitions. [2020-12-22 10:29:25,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:25,298 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 395 transitions. [2020-12-22 10:29:25,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:25,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:25,299 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:25,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 10:29:25,500 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:25,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:25,501 INFO L82 PathProgramCache]: Analyzing trace with hash -265621781, now seen corresponding path program 28 times [2020-12-22 10:29:25,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:25,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547229245] [2020-12-22 10:29:25,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:25,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547229245] [2020-12-22 10:29:25,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440367909] [2020-12-22 10:29:25,597 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 [2020-12-22 10:29:25,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:25,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:25,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:25,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:25,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:25,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:25,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967851702] [2020-12-22 10:29:25,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:25,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:25,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:25,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:25,912 INFO L87 Difference]: Start difference. First operand 149 states and 395 transitions. Second operand 16 states. [2020-12-22 10:29:26,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:26,348 INFO L93 Difference]: Finished difference Result 212 states and 514 transitions. [2020-12-22 10:29:26,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:29:26,349 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:26,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:26,351 INFO L225 Difference]: With dead ends: 212 [2020-12-22 10:29:26,351 INFO L226 Difference]: Without dead ends: 210 [2020-12-22 10:29:26,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:29:26,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-12-22 10:29:26,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 151. [2020-12-22 10:29:26,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-22 10:29:26,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 402 transitions. [2020-12-22 10:29:26,357 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 402 transitions. Word has length 13 [2020-12-22 10:29:26,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:26,357 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 402 transitions. [2020-12-22 10:29:26,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:26,357 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 402 transitions. [2020-12-22 10:29:26,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:26,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:26,358 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:26,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:26,564 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:26,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:26,565 INFO L82 PathProgramCache]: Analyzing trace with hash -265602344, now seen corresponding path program 29 times [2020-12-22 10:29:26,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:26,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013408749] [2020-12-22 10:29:26,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:26,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013408749] [2020-12-22 10:29:26,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374976574] [2020-12-22 10:29:26,686 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:26,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:29:26,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:26,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:26,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:26,913 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:26,915 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:29:26,917 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:26,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:26,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:26,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700412247] [2020-12-22 10:29:26,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:26,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:26,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:26,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:26,946 INFO L87 Difference]: Start difference. First operand 151 states and 402 transitions. Second operand 16 states. [2020-12-22 10:29:27,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:27,632 INFO L93 Difference]: Finished difference Result 252 states and 609 transitions. [2020-12-22 10:29:27,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:29:27,633 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:27,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:27,635 INFO L225 Difference]: With dead ends: 252 [2020-12-22 10:29:27,635 INFO L226 Difference]: Without dead ends: 240 [2020-12-22 10:29:27,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=353, Invalid=769, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 10:29:27,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-12-22 10:29:27,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 147. [2020-12-22 10:29:27,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-22 10:29:27,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 398 transitions. [2020-12-22 10:29:27,642 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 398 transitions. Word has length 13 [2020-12-22 10:29:27,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:27,642 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 398 transitions. [2020-12-22 10:29:27,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:27,642 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 398 transitions. [2020-12-22 10:29:27,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:27,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:27,643 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:27,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-22 10:29:27,859 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:27,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:27,860 INFO L82 PathProgramCache]: Analyzing trace with hash -539778060, now seen corresponding path program 30 times [2020-12-22 10:29:27,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:27,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515942540] [2020-12-22 10:29:27,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:27,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515942540] [2020-12-22 10:29:27,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340511578] [2020-12-22 10:29:27,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:28,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-22 10:29:28,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:28,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:28,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:28,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:28,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:28,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025823406] [2020-12-22 10:29:28,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:28,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:28,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:28,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:28,192 INFO L87 Difference]: Start difference. First operand 147 states and 398 transitions. Second operand 16 states. [2020-12-22 10:29:28,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:28,489 INFO L93 Difference]: Finished difference Result 212 states and 525 transitions. [2020-12-22 10:29:28,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:29:28,489 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:28,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:28,491 INFO L225 Difference]: With dead ends: 212 [2020-12-22 10:29:28,491 INFO L226 Difference]: Without dead ends: 210 [2020-12-22 10:29:28,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:29:28,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-12-22 10:29:28,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-12-22 10:29:28,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-22 10:29:28,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 408 transitions. [2020-12-22 10:29:28,497 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 408 transitions. Word has length 13 [2020-12-22 10:29:28,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:28,498 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 408 transitions. [2020-12-22 10:29:28,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:28,498 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 408 transitions. [2020-12-22 10:29:28,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:28,499 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:28,499 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:28,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 10:29:28,712 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:28,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:28,713 INFO L82 PathProgramCache]: Analyzing trace with hash -539691570, now seen corresponding path program 31 times [2020-12-22 10:29:28,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:28,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985100062] [2020-12-22 10:29:28,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:28,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:28,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985100062] [2020-12-22 10:29:28,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117160189] [2020-12-22 10:29:28,819 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:28,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:28,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:29,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:29,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:29,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:29,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981696594] [2020-12-22 10:29:29,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:29,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:29,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:29,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:29,044 INFO L87 Difference]: Start difference. First operand 153 states and 408 transitions. Second operand 16 states. [2020-12-22 10:29:29,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:29,391 INFO L93 Difference]: Finished difference Result 205 states and 512 transitions. [2020-12-22 10:29:29,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:29:29,392 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:29,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:29,394 INFO L225 Difference]: With dead ends: 205 [2020-12-22 10:29:29,394 INFO L226 Difference]: Without dead ends: 203 [2020-12-22 10:29:29,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:29:29,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-12-22 10:29:29,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 153. [2020-12-22 10:29:29,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-22 10:29:29,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 408 transitions. [2020-12-22 10:29:29,399 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 408 transitions. Word has length 13 [2020-12-22 10:29:29,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:29,399 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 408 transitions. [2020-12-22 10:29:29,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:29,399 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 408 transitions. [2020-12-22 10:29:29,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:29,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:29,400 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:29,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 10:29:29,615 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:29,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:29,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1841716828, now seen corresponding path program 32 times [2020-12-22 10:29:29,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:29,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462446900] [2020-12-22 10:29:29,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:29,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462446900] [2020-12-22 10:29:29,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895195607] [2020-12-22 10:29:29,705 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:29,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:29,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:29,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:29,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:29,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:29,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:29,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318377899] [2020-12-22 10:29:29,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:29,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:29,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:29,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:29,902 INFO L87 Difference]: Start difference. First operand 153 states and 408 transitions. Second operand 16 states. [2020-12-22 10:29:30,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:30,243 INFO L93 Difference]: Finished difference Result 224 states and 549 transitions. [2020-12-22 10:29:30,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:29:30,244 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:30,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:30,246 INFO L225 Difference]: With dead ends: 224 [2020-12-22 10:29:30,246 INFO L226 Difference]: Without dead ends: 222 [2020-12-22 10:29:30,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:29:30,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-12-22 10:29:30,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 155. [2020-12-22 10:29:30,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-22 10:29:30,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 413 transitions. [2020-12-22 10:29:30,250 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 413 transitions. Word has length 13 [2020-12-22 10:29:30,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:30,250 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 413 transitions. [2020-12-22 10:29:30,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:30,251 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 413 transitions. [2020-12-22 10:29:30,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:30,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:30,251 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:30,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-12-22 10:29:30,452 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:30,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:30,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1841803318, now seen corresponding path program 33 times [2020-12-22 10:29:30,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:30,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193772105] [2020-12-22 10:29:30,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:30,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:30,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193772105] [2020-12-22 10:29:30,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188767504] [2020-12-22 10:29:30,553 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:30,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:29:30,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:30,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:30,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:30,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:30,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:30,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:30,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578007427] [2020-12-22 10:29:30,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:30,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:30,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:30,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:30,769 INFO L87 Difference]: Start difference. First operand 155 states and 413 transitions. Second operand 16 states. [2020-12-22 10:29:31,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:31,134 INFO L93 Difference]: Finished difference Result 214 states and 529 transitions. [2020-12-22 10:29:31,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:29:31,135 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:31,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:31,136 INFO L225 Difference]: With dead ends: 214 [2020-12-22 10:29:31,137 INFO L226 Difference]: Without dead ends: 212 [2020-12-22 10:29:31,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:29:31,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-12-22 10:29:31,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 154. [2020-12-22 10:29:31,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-22 10:29:31,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 410 transitions. [2020-12-22 10:29:31,142 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 410 transitions. Word has length 13 [2020-12-22 10:29:31,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:31,143 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 410 transitions. [2020-12-22 10:29:31,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:31,143 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 410 transitions. [2020-12-22 10:29:31,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:31,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:31,144 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:31,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:31,354 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:31,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:31,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1860485158, now seen corresponding path program 34 times [2020-12-22 10:29:31,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:31,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123484399] [2020-12-22 10:29:31,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:31,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:31,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123484399] [2020-12-22 10:29:31,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196493714] [2020-12-22 10:29:31,465 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:31,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:31,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:31,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:31,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:31,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:31,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:31,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:31,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249147022] [2020-12-22 10:29:31,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:31,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:31,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:31,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:31,692 INFO L87 Difference]: Start difference. First operand 154 states and 410 transitions. Second operand 16 states. [2020-12-22 10:29:32,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:32,149 INFO L93 Difference]: Finished difference Result 226 states and 546 transitions. [2020-12-22 10:29:32,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:29:32,150 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:32,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:32,152 INFO L225 Difference]: With dead ends: 226 [2020-12-22 10:29:32,152 INFO L226 Difference]: Without dead ends: 224 [2020-12-22 10:29:32,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:29:32,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-12-22 10:29:32,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 156. [2020-12-22 10:29:32,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-12-22 10:29:32,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 417 transitions. [2020-12-22 10:29:32,158 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 417 transitions. Word has length 13 [2020-12-22 10:29:32,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:32,158 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 417 transitions. [2020-12-22 10:29:32,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:32,158 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 417 transitions. [2020-12-22 10:29:32,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:32,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:32,159 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:32,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-22 10:29:32,373 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:32,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:32,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1861177078, now seen corresponding path program 35 times [2020-12-22 10:29:32,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:32,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319694761] [2020-12-22 10:29:32,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:32,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:32,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319694761] [2020-12-22 10:29:32,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220645923] [2020-12-22 10:29:32,472 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:32,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:32,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:32,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:32,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:32,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:32,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:32,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:32,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56932607] [2020-12-22 10:29:32,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:32,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:32,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:32,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:32,673 INFO L87 Difference]: Start difference. First operand 156 states and 417 transitions. Second operand 16 states. [2020-12-22 10:29:33,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:33,180 INFO L93 Difference]: Finished difference Result 227 states and 555 transitions. [2020-12-22 10:29:33,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 10:29:33,181 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:33,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:33,182 INFO L225 Difference]: With dead ends: 227 [2020-12-22 10:29:33,183 INFO L226 Difference]: Without dead ends: 225 [2020-12-22 10:29:33,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-12-22 10:29:33,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-12-22 10:29:33,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 159. [2020-12-22 10:29:33,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-22 10:29:33,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 429 transitions. [2020-12-22 10:29:33,189 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 429 transitions. Word has length 13 [2020-12-22 10:29:33,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:33,189 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 429 transitions. [2020-12-22 10:29:33,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:33,189 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 429 transitions. [2020-12-22 10:29:33,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:33,190 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:33,190 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:33,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:33,406 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:33,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:33,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1861199398, now seen corresponding path program 36 times [2020-12-22 10:29:33,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:33,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643921931] [2020-12-22 10:29:33,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:33,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643921931] [2020-12-22 10:29:33,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042631764] [2020-12-22 10:29:33,496 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:33,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-22 10:29:33,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:33,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:33,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:33,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:33,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:33,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:33,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002636803] [2020-12-22 10:29:33,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:33,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:33,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:33,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:33,730 INFO L87 Difference]: Start difference. First operand 159 states and 429 transitions. Second operand 16 states. [2020-12-22 10:29:34,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:34,580 INFO L93 Difference]: Finished difference Result 277 states and 672 transitions. [2020-12-22 10:29:34,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 10:29:34,581 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:34,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:34,583 INFO L225 Difference]: With dead ends: 277 [2020-12-22 10:29:34,583 INFO L226 Difference]: Without dead ends: 265 [2020-12-22 10:29:34,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=408, Invalid=998, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 10:29:34,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-12-22 10:29:34,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 154. [2020-12-22 10:29:34,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-22 10:29:34,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 414 transitions. [2020-12-22 10:29:34,589 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 414 transitions. Word has length 13 [2020-12-22 10:29:34,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:34,589 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 414 transitions. [2020-12-22 10:29:34,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:34,589 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 414 transitions. [2020-12-22 10:29:34,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:34,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:34,590 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:34,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-22 10:29:34,801 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:34,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:34,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1863252838, now seen corresponding path program 37 times [2020-12-22 10:29:34,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:34,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401955990] [2020-12-22 10:29:34,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:34,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:34,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:34,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401955990] [2020-12-22 10:29:34,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100668583] [2020-12-22 10:29:34,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:34,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:34,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:35,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:35,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:35,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758038731] [2020-12-22 10:29:35,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:35,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:35,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:35,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:35,138 INFO L87 Difference]: Start difference. First operand 154 states and 414 transitions. Second operand 16 states. [2020-12-22 10:29:35,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:35,608 INFO L93 Difference]: Finished difference Result 231 states and 564 transitions. [2020-12-22 10:29:35,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:29:35,609 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:35,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:35,611 INFO L225 Difference]: With dead ends: 231 [2020-12-22 10:29:35,611 INFO L226 Difference]: Without dead ends: 229 [2020-12-22 10:29:35,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=579, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:29:35,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-12-22 10:29:35,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 155. [2020-12-22 10:29:35,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-22 10:29:35,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 419 transitions. [2020-12-22 10:29:35,616 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 419 transitions. Word has length 13 [2020-12-22 10:29:35,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:35,616 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 419 transitions. [2020-12-22 10:29:35,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:35,616 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 419 transitions. [2020-12-22 10:29:35,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:35,617 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:35,617 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:35,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-22 10:29:35,831 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:35,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:35,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1863858268, now seen corresponding path program 38 times [2020-12-22 10:29:35,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:35,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938953774] [2020-12-22 10:29:35,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:35,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938953774] [2020-12-22 10:29:35,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290188723] [2020-12-22 10:29:35,921 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:35,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:35,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:35,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:35,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:36,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:36,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:36,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366489588] [2020-12-22 10:29:36,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:36,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:36,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:36,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:36,155 INFO L87 Difference]: Start difference. First operand 155 states and 419 transitions. Second operand 16 states. [2020-12-22 10:29:36,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:36,682 INFO L93 Difference]: Finished difference Result 222 states and 545 transitions. [2020-12-22 10:29:36,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:29:36,683 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:36,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:36,685 INFO L225 Difference]: With dead ends: 222 [2020-12-22 10:29:36,685 INFO L226 Difference]: Without dead ends: 220 [2020-12-22 10:29:36,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=229, Invalid=527, Unknown=0, NotChecked=0, Total=756 [2020-12-22 10:29:36,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-12-22 10:29:36,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 157. [2020-12-22 10:29:36,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-22 10:29:36,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 426 transitions. [2020-12-22 10:29:36,691 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 426 transitions. Word has length 13 [2020-12-22 10:29:36,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:36,691 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 426 transitions. [2020-12-22 10:29:36,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:36,691 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 426 transitions. [2020-12-22 10:29:36,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:36,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:36,692 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:36,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:36,893 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:36,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:36,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1863877705, now seen corresponding path program 39 times [2020-12-22 10:29:36,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:36,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745535288] [2020-12-22 10:29:36,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:36,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745535288] [2020-12-22 10:29:36,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689160197] [2020-12-22 10:29:36,985 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:37,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:29:37,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:37,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 10:29:37,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:37,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:37,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-12-22 10:29:37,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199510515] [2020-12-22 10:29:37,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 10:29:37,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:37,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 10:29:37,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:29:37,166 INFO L87 Difference]: Start difference. First operand 157 states and 426 transitions. Second operand 15 states. [2020-12-22 10:29:38,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:38,153 INFO L93 Difference]: Finished difference Result 290 states and 693 transitions. [2020-12-22 10:29:38,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 10:29:38,156 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-12-22 10:29:38,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:38,158 INFO L225 Difference]: With dead ends: 290 [2020-12-22 10:29:38,159 INFO L226 Difference]: Without dead ends: 278 [2020-12-22 10:29:38,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=446, Invalid=1360, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 10:29:38,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-12-22 10:29:38,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 159. [2020-12-22 10:29:38,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-22 10:29:38,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 422 transitions. [2020-12-22 10:29:38,165 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 422 transitions. Word has length 13 [2020-12-22 10:29:38,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:38,165 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 422 transitions. [2020-12-22 10:29:38,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 10:29:38,166 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 422 transitions. [2020-12-22 10:29:38,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:38,166 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:38,166 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:38,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-22 10:29:38,382 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:38,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:38,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1951482845, now seen corresponding path program 40 times [2020-12-22 10:29:38,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:38,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201426672] [2020-12-22 10:29:38,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:38,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201426672] [2020-12-22 10:29:38,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394144335] [2020-12-22 10:29:38,478 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:38,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:38,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:38,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:38,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:38,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:38,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:38,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684389741] [2020-12-22 10:29:38,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:38,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:38,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:38,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:38,679 INFO L87 Difference]: Start difference. First operand 159 states and 422 transitions. Second operand 16 states. [2020-12-22 10:29:38,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:38,886 INFO L93 Difference]: Finished difference Result 210 states and 526 transitions. [2020-12-22 10:29:38,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 10:29:38,887 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:38,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:38,888 INFO L225 Difference]: With dead ends: 210 [2020-12-22 10:29:38,888 INFO L226 Difference]: Without dead ends: 208 [2020-12-22 10:29:38,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:29:38,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-22 10:29:38,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 162. [2020-12-22 10:29:38,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-22 10:29:38,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 430 transitions. [2020-12-22 10:29:38,893 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 430 transitions. Word has length 13 [2020-12-22 10:29:38,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:38,893 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 430 transitions. [2020-12-22 10:29:38,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:38,893 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 430 transitions. [2020-12-22 10:29:38,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:38,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:38,894 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:39,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-22 10:29:39,109 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:39,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:39,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1951485728, now seen corresponding path program 41 times [2020-12-22 10:29:39,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:39,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884336136] [2020-12-22 10:29:39,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:39,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884336136] [2020-12-22 10:29:39,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905314859] [2020-12-22 10:29:39,198 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:39,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:29:39,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:39,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:39,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:39,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:39,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:39,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297767888] [2020-12-22 10:29:39,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:39,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:39,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:39,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:39,431 INFO L87 Difference]: Start difference. First operand 162 states and 430 transitions. Second operand 16 states. [2020-12-22 10:29:39,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:39,709 INFO L93 Difference]: Finished difference Result 218 states and 543 transitions. [2020-12-22 10:29:39,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:29:39,710 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:39,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:39,713 INFO L225 Difference]: With dead ends: 218 [2020-12-22 10:29:39,713 INFO L226 Difference]: Without dead ends: 216 [2020-12-22 10:29:39,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:29:39,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-12-22 10:29:39,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 164. [2020-12-22 10:29:39,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-22 10:29:39,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 435 transitions. [2020-12-22 10:29:39,719 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 435 transitions. Word has length 13 [2020-12-22 10:29:39,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:39,719 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 435 transitions. [2020-12-22 10:29:39,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:39,719 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 435 transitions. [2020-12-22 10:29:39,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:39,720 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:39,720 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:39,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-22 10:29:39,935 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:39,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:39,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1951572218, now seen corresponding path program 42 times [2020-12-22 10:29:39,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:39,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769190871] [2020-12-22 10:29:39,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:40,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:40,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769190871] [2020-12-22 10:29:40,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043616761] [2020-12-22 10:29:40,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:40,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:29:40,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:40,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:40,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:40,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:40,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:40,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891127592] [2020-12-22 10:29:40,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:40,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:40,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:40,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:40,268 INFO L87 Difference]: Start difference. First operand 164 states and 435 transitions. Second operand 16 states. [2020-12-22 10:29:40,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:40,485 INFO L93 Difference]: Finished difference Result 218 states and 545 transitions. [2020-12-22 10:29:40,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:29:40,486 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:40,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:40,487 INFO L225 Difference]: With dead ends: 218 [2020-12-22 10:29:40,487 INFO L226 Difference]: Without dead ends: 216 [2020-12-22 10:29:40,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:29:40,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-12-22 10:29:40,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 163. [2020-12-22 10:29:40,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-22 10:29:40,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 432 transitions. [2020-12-22 10:29:40,492 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 432 transitions. Word has length 13 [2020-12-22 10:29:40,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:40,492 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 432 transitions. [2020-12-22 10:29:40,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:40,493 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 432 transitions. [2020-12-22 10:29:40,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:40,493 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:40,493 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:40,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:40,705 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:40,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:40,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1531586955, now seen corresponding path program 43 times [2020-12-22 10:29:40,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:40,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581974277] [2020-12-22 10:29:40,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:40,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:40,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:40,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581974277] [2020-12-22 10:29:40,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012656601] [2020-12-22 10:29:40,795 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:40,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:40,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:41,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:41,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:41,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:41,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320247971] [2020-12-22 10:29:41,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:41,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:41,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:41,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:41,011 INFO L87 Difference]: Start difference. First operand 163 states and 432 transitions. Second operand 16 states. [2020-12-22 10:29:41,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:41,260 INFO L93 Difference]: Finished difference Result 222 states and 550 transitions. [2020-12-22 10:29:41,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:29:41,261 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:41,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:41,263 INFO L225 Difference]: With dead ends: 222 [2020-12-22 10:29:41,263 INFO L226 Difference]: Without dead ends: 220 [2020-12-22 10:29:41,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:29:41,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-12-22 10:29:41,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 164. [2020-12-22 10:29:41,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-22 10:29:41,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 435 transitions. [2020-12-22 10:29:41,269 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 435 transitions. Word has length 13 [2020-12-22 10:29:41,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:41,269 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 435 transitions. [2020-12-22 10:29:41,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:41,269 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 435 transitions. [2020-12-22 10:29:41,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:41,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:41,270 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:41,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:41,486 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:41,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:41,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1531584072, now seen corresponding path program 44 times [2020-12-22 10:29:41,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:41,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234599087] [2020-12-22 10:29:41,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:41,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:41,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234599087] [2020-12-22 10:29:41,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678562324] [2020-12-22 10:29:41,580 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:41,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:41,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:41,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:41,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:41,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:41,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:41,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:41,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115116476] [2020-12-22 10:29:41,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:41,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:41,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:41,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:41,805 INFO L87 Difference]: Start difference. First operand 164 states and 435 transitions. Second operand 16 states. [2020-12-22 10:29:42,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:42,142 INFO L93 Difference]: Finished difference Result 232 states and 571 transitions. [2020-12-22 10:29:42,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:29:42,143 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:42,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:42,145 INFO L225 Difference]: With dead ends: 232 [2020-12-22 10:29:42,145 INFO L226 Difference]: Without dead ends: 230 [2020-12-22 10:29:42,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:29:42,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-12-22 10:29:42,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 166. [2020-12-22 10:29:42,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-12-22 10:29:42,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 440 transitions. [2020-12-22 10:29:42,150 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 440 transitions. Word has length 13 [2020-12-22 10:29:42,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:42,150 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 440 transitions. [2020-12-22 10:29:42,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:42,150 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 440 transitions. [2020-12-22 10:29:42,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:42,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:42,151 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:42,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:42,365 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:42,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:42,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1531497582, now seen corresponding path program 45 times [2020-12-22 10:29:42,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:42,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316657662] [2020-12-22 10:29:42,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:42,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316657662] [2020-12-22 10:29:42,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139682169] [2020-12-22 10:29:42,458 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:42,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:29:42,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:42,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:29:42,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:42,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:42,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:42,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:42,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12602265] [2020-12-22 10:29:42,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:42,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:42,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:42,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:42,677 INFO L87 Difference]: Start difference. First operand 166 states and 440 transitions. Second operand 16 states. [2020-12-22 10:29:42,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:42,957 INFO L93 Difference]: Finished difference Result 228 states and 565 transitions. [2020-12-22 10:29:42,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:29:42,958 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:42,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:42,960 INFO L225 Difference]: With dead ends: 228 [2020-12-22 10:29:42,960 INFO L226 Difference]: Without dead ends: 226 [2020-12-22 10:29:42,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:29:42,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-12-22 10:29:42,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 161. [2020-12-22 10:29:42,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-22 10:29:42,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 427 transitions. [2020-12-22 10:29:42,964 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 427 transitions. Word has length 13 [2020-12-22 10:29:42,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:42,965 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 427 transitions. [2020-12-22 10:29:42,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:42,965 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 427 transitions. [2020-12-22 10:29:42,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:42,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:42,966 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:43,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:43,168 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:43,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:43,169 INFO L82 PathProgramCache]: Analyzing trace with hash -949768725, now seen corresponding path program 46 times [2020-12-22 10:29:43,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:43,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028454429] [2020-12-22 10:29:43,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:43,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:43,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:43,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028454429] [2020-12-22 10:29:43,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839179646] [2020-12-22 10:29:43,268 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:43,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:43,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:43,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:43,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:43,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:43,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:43,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533499431] [2020-12-22 10:29:43,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:43,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:43,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:43,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:43,501 INFO L87 Difference]: Start difference. First operand 161 states and 427 transitions. Second operand 16 states. [2020-12-22 10:29:43,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:43,761 INFO L93 Difference]: Finished difference Result 221 states and 546 transitions. [2020-12-22 10:29:43,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:29:43,762 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:43,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:43,763 INFO L225 Difference]: With dead ends: 221 [2020-12-22 10:29:43,763 INFO L226 Difference]: Without dead ends: 219 [2020-12-22 10:29:43,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:29:43,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-12-22 10:29:43,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 162. [2020-12-22 10:29:43,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-22 10:29:43,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 430 transitions. [2020-12-22 10:29:43,768 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 430 transitions. Word has length 13 [2020-12-22 10:29:43,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:43,768 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 430 transitions. [2020-12-22 10:29:43,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:43,768 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 430 transitions. [2020-12-22 10:29:43,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:43,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:43,769 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:43,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-12-22 10:29:43,970 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:43,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:43,971 INFO L82 PathProgramCache]: Analyzing trace with hash -949765842, now seen corresponding path program 47 times [2020-12-22 10:29:43,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:43,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878383667] [2020-12-22 10:29:43,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:44,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:44,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878383667] [2020-12-22 10:29:44,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75263405] [2020-12-22 10:29:44,058 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:44,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:29:44,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:44,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:44,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:44,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:44,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:44,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333700523] [2020-12-22 10:29:44,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:44,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:44,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:44,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:44,301 INFO L87 Difference]: Start difference. First operand 162 states and 430 transitions. Second operand 16 states. [2020-12-22 10:29:44,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:44,642 INFO L93 Difference]: Finished difference Result 240 states and 582 transitions. [2020-12-22 10:29:44,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:29:44,643 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:44,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:44,645 INFO L225 Difference]: With dead ends: 240 [2020-12-22 10:29:44,645 INFO L226 Difference]: Without dead ends: 238 [2020-12-22 10:29:44,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:29:44,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-12-22 10:29:44,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 162. [2020-12-22 10:29:44,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-22 10:29:44,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 430 transitions. [2020-12-22 10:29:44,650 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 430 transitions. Word has length 13 [2020-12-22 10:29:44,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:44,650 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 430 transitions. [2020-12-22 10:29:44,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:44,650 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 430 transitions. [2020-12-22 10:29:44,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:44,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:44,651 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:44,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:44,866 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:44,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:44,866 INFO L82 PathProgramCache]: Analyzing trace with hash -949679352, now seen corresponding path program 48 times [2020-12-22 10:29:44,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:44,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848855987] [2020-12-22 10:29:44,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:44,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848855987] [2020-12-22 10:29:44,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299872739] [2020-12-22 10:29:44,955 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:45,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:29:45,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:45,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:45,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:45,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:45,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:45,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:45,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80812126] [2020-12-22 10:29:45,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:45,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:45,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:45,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:45,187 INFO L87 Difference]: Start difference. First operand 162 states and 430 transitions. Second operand 16 states. [2020-12-22 10:29:45,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:45,488 INFO L93 Difference]: Finished difference Result 236 states and 575 transitions. [2020-12-22 10:29:45,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:29:45,489 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:45,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:45,491 INFO L225 Difference]: With dead ends: 236 [2020-12-22 10:29:45,492 INFO L226 Difference]: Without dead ends: 234 [2020-12-22 10:29:45,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:29:45,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-12-22 10:29:45,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 161. [2020-12-22 10:29:45,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-22 10:29:45,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 427 transitions. [2020-12-22 10:29:45,497 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 427 transitions. Word has length 13 [2020-12-22 10:29:45,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:45,497 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 427 transitions. [2020-12-22 10:29:45,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:45,497 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 427 transitions. [2020-12-22 10:29:45,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:45,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:45,498 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:45,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-22 10:29:45,714 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:45,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:45,714 INFO L82 PathProgramCache]: Analyzing trace with hash -931000395, now seen corresponding path program 49 times [2020-12-22 10:29:45,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:45,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397300074] [2020-12-22 10:29:45,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:45,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:45,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397300074] [2020-12-22 10:29:45,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861506557] [2020-12-22 10:29:45,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:45,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:45,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:46,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:46,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:46,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022270589] [2020-12-22 10:29:46,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:46,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:46,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:46,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:46,036 INFO L87 Difference]: Start difference. First operand 161 states and 427 transitions. Second operand 16 states. [2020-12-22 10:29:46,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:46,354 INFO L93 Difference]: Finished difference Result 233 states and 564 transitions. [2020-12-22 10:29:46,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:29:46,355 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:46,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:46,357 INFO L225 Difference]: With dead ends: 233 [2020-12-22 10:29:46,357 INFO L226 Difference]: Without dead ends: 231 [2020-12-22 10:29:46,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-12-22 10:29:46,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-12-22 10:29:46,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 161. [2020-12-22 10:29:46,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-22 10:29:46,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 427 transitions. [2020-12-22 10:29:46,362 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 427 transitions. Word has length 13 [2020-12-22 10:29:46,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:46,362 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 427 transitions. [2020-12-22 10:29:46,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:46,362 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 427 transitions. [2020-12-22 10:29:46,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:46,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:46,363 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:46,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:46,570 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:46,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:46,571 INFO L82 PathProgramCache]: Analyzing trace with hash -930997512, now seen corresponding path program 50 times [2020-12-22 10:29:46,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:46,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117919727] [2020-12-22 10:29:46,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:46,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:46,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117919727] [2020-12-22 10:29:46,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433647316] [2020-12-22 10:29:46,690 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:46,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:46,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:46,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:46,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:46,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:46,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:46,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680884089] [2020-12-22 10:29:46,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:46,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:46,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:46,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:46,917 INFO L87 Difference]: Start difference. First operand 161 states and 427 transitions. Second operand 16 states. [2020-12-22 10:29:47,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:47,388 INFO L93 Difference]: Finished difference Result 246 states and 594 transitions. [2020-12-22 10:29:47,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:29:47,389 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:47,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:47,391 INFO L225 Difference]: With dead ends: 246 [2020-12-22 10:29:47,391 INFO L226 Difference]: Without dead ends: 244 [2020-12-22 10:29:47,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2020-12-22 10:29:47,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-12-22 10:29:47,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 163. [2020-12-22 10:29:47,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-22 10:29:47,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 434 transitions. [2020-12-22 10:29:47,395 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 434 transitions. Word has length 13 [2020-12-22 10:29:47,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:47,396 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 434 transitions. [2020-12-22 10:29:47,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:47,396 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 434 transitions. [2020-12-22 10:29:47,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:47,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:47,397 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:47,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-22 10:29:47,611 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:47,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:47,612 INFO L82 PathProgramCache]: Analyzing trace with hash -930394965, now seen corresponding path program 51 times [2020-12-22 10:29:47,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:47,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716868768] [2020-12-22 10:29:47,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:47,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716868768] [2020-12-22 10:29:47,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580722930] [2020-12-22 10:29:47,711 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:47,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:29:47,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:47,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:29:47,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:47,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:47,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-12-22 10:29:47,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211298178] [2020-12-22 10:29:47,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 10:29:47,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:47,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 10:29:47,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:29:47,903 INFO L87 Difference]: Start difference. First operand 163 states and 434 transitions. Second operand 15 states. [2020-12-22 10:29:48,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:48,385 INFO L93 Difference]: Finished difference Result 229 states and 564 transitions. [2020-12-22 10:29:48,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:29:48,386 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-12-22 10:29:48,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:48,388 INFO L225 Difference]: With dead ends: 229 [2020-12-22 10:29:48,389 INFO L226 Difference]: Without dead ends: 227 [2020-12-22 10:29:48,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:29:48,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-12-22 10:29:48,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 165. [2020-12-22 10:29:48,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-22 10:29:48,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 441 transitions. [2020-12-22 10:29:48,394 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 441 transitions. Word has length 13 [2020-12-22 10:29:48,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:48,394 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 441 transitions. [2020-12-22 10:29:48,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 10:29:48,395 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 441 transitions. [2020-12-22 10:29:48,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:48,395 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:48,396 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:48,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:48,610 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:48,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:48,611 INFO L82 PathProgramCache]: Analyzing trace with hash -930375528, now seen corresponding path program 52 times [2020-12-22 10:29:48,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:48,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378534594] [2020-12-22 10:29:48,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:48,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:48,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:48,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378534594] [2020-12-22 10:29:48,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519096905] [2020-12-22 10:29:48,704 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:48,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:48,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:48,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:48,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:48,883 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:48,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:48,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:48,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:48,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691230763] [2020-12-22 10:29:48,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:48,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:48,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:48,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:48,909 INFO L87 Difference]: Start difference. First operand 165 states and 441 transitions. Second operand 16 states. [2020-12-22 10:29:49,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:49,428 INFO L93 Difference]: Finished difference Result 265 states and 642 transitions. [2020-12-22 10:29:49,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 10:29:49,429 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:49,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:49,431 INFO L225 Difference]: With dead ends: 265 [2020-12-22 10:29:49,431 INFO L226 Difference]: Without dead ends: 253 [2020-12-22 10:29:49,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-12-22 10:29:49,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-12-22 10:29:49,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 164. [2020-12-22 10:29:49,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-22 10:29:49,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 437 transitions. [2020-12-22 10:29:49,436 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 437 transitions. Word has length 13 [2020-12-22 10:29:49,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:49,436 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 437 transitions. [2020-12-22 10:29:49,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:49,436 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 437 transitions. [2020-12-22 10:29:49,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:49,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:49,437 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:49,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:49,638 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:49,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:49,639 INFO L82 PathProgramCache]: Analyzing trace with hash -930305592, now seen corresponding path program 53 times [2020-12-22 10:29:49,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:49,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082673302] [2020-12-22 10:29:49,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:49,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082673302] [2020-12-22 10:29:49,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992766478] [2020-12-22 10:29:49,728 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:49,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:29:49,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:49,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:49,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:49,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:49,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:49,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:49,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042957862] [2020-12-22 10:29:49,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:49,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:49,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:49,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:49,978 INFO L87 Difference]: Start difference. First operand 164 states and 437 transitions. Second operand 16 states. [2020-12-22 10:29:50,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:50,557 INFO L93 Difference]: Finished difference Result 258 states and 628 transitions. [2020-12-22 10:29:50,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 10:29:50,558 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:50,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:50,560 INFO L225 Difference]: With dead ends: 258 [2020-12-22 10:29:50,560 INFO L226 Difference]: Without dead ends: 256 [2020-12-22 10:29:50,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=263, Invalid=607, Unknown=0, NotChecked=0, Total=870 [2020-12-22 10:29:50,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-12-22 10:29:50,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 167. [2020-12-22 10:29:50,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-22 10:29:50,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 449 transitions. [2020-12-22 10:29:50,565 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 449 transitions. Word has length 13 [2020-12-22 10:29:50,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:50,565 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 449 transitions. [2020-12-22 10:29:50,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:50,566 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 449 transitions. [2020-12-22 10:29:50,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:50,566 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:50,566 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:50,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-12-22 10:29:50,775 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:50,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:50,775 INFO L82 PathProgramCache]: Analyzing trace with hash -930283272, now seen corresponding path program 54 times [2020-12-22 10:29:50,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:50,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271068302] [2020-12-22 10:29:50,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:50,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271068302] [2020-12-22 10:29:50,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748623092] [2020-12-22 10:29:50,870 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:50,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:29:50,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:50,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:50,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:51,076 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:29:51,078 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:29:51,080 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:51,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:51,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:51,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020341623] [2020-12-22 10:29:51,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:51,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:51,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:51,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:51,105 INFO L87 Difference]: Start difference. First operand 167 states and 449 transitions. Second operand 16 states. [2020-12-22 10:29:52,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:52,094 INFO L93 Difference]: Finished difference Result 314 states and 747 transitions. [2020-12-22 10:29:52,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 10:29:52,095 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:52,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:52,097 INFO L225 Difference]: With dead ends: 314 [2020-12-22 10:29:52,097 INFO L226 Difference]: Without dead ends: 302 [2020-12-22 10:29:52,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 10:29:52,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-12-22 10:29:52,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 163. [2020-12-22 10:29:52,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-22 10:29:52,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 433 transitions. [2020-12-22 10:29:52,102 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 433 transitions. Word has length 13 [2020-12-22 10:29:52,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:52,102 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 433 transitions. [2020-12-22 10:29:52,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:52,103 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 433 transitions. [2020-12-22 10:29:52,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:52,103 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:52,103 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:52,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:52,319 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:52,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:52,319 INFO L82 PathProgramCache]: Analyzing trace with hash -928229832, now seen corresponding path program 55 times [2020-12-22 10:29:52,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:52,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989034248] [2020-12-22 10:29:52,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:52,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989034248] [2020-12-22 10:29:52,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80684845] [2020-12-22 10:29:52,413 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:52,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:52,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:52,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:52,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:52,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165045630] [2020-12-22 10:29:52,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:52,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:52,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:52,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:52,636 INFO L87 Difference]: Start difference. First operand 163 states and 433 transitions. Second operand 16 states. [2020-12-22 10:29:53,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:53,093 INFO L93 Difference]: Finished difference Result 258 states and 626 transitions. [2020-12-22 10:29:53,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:29:53,094 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:53,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:53,096 INFO L225 Difference]: With dead ends: 258 [2020-12-22 10:29:53,096 INFO L226 Difference]: Without dead ends: 256 [2020-12-22 10:29:53,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:29:53,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-12-22 10:29:53,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 162. [2020-12-22 10:29:53,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-22 10:29:53,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 433 transitions. [2020-12-22 10:29:53,100 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 433 transitions. Word has length 13 [2020-12-22 10:29:53,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:53,100 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 433 transitions. [2020-12-22 10:29:53,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:53,100 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 433 transitions. [2020-12-22 10:29:53,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:53,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:53,101 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:53,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:53,302 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:53,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:53,303 INFO L82 PathProgramCache]: Analyzing trace with hash -927624402, now seen corresponding path program 56 times [2020-12-22 10:29:53,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:53,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992621240] [2020-12-22 10:29:53,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:53,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:53,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992621240] [2020-12-22 10:29:53,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911257604] [2020-12-22 10:29:53,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:53,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:53,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:53,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:53,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:53,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:53,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:53,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:53,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692214517] [2020-12-22 10:29:53,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:53,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:53,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:53,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:53,626 INFO L87 Difference]: Start difference. First operand 162 states and 433 transitions. Second operand 16 states. [2020-12-22 10:29:54,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:54,177 INFO L93 Difference]: Finished difference Result 252 states and 614 transitions. [2020-12-22 10:29:54,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 10:29:54,178 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:54,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:54,179 INFO L225 Difference]: With dead ends: 252 [2020-12-22 10:29:54,180 INFO L226 Difference]: Without dead ends: 250 [2020-12-22 10:29:54,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-12-22 10:29:54,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-12-22 10:29:54,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 164. [2020-12-22 10:29:54,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-22 10:29:54,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 440 transitions. [2020-12-22 10:29:54,184 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 440 transitions. Word has length 13 [2020-12-22 10:29:54,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:54,184 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 440 transitions. [2020-12-22 10:29:54,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:54,185 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 440 transitions. [2020-12-22 10:29:54,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:54,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:54,186 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:54,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-12-22 10:29:54,401 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:54,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:54,402 INFO L82 PathProgramCache]: Analyzing trace with hash -927604965, now seen corresponding path program 57 times [2020-12-22 10:29:54,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:54,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827706327] [2020-12-22 10:29:54,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:54,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:54,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827706327] [2020-12-22 10:29:54,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634870983] [2020-12-22 10:29:54,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:54,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:29:54,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:54,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:54,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:54,706 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:54,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:54,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:54,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439194751] [2020-12-22 10:29:54,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:54,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:54,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:54,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:54,730 INFO L87 Difference]: Start difference. First operand 164 states and 440 transitions. Second operand 16 states. [2020-12-22 10:29:55,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:55,511 INFO L93 Difference]: Finished difference Result 301 states and 723 transitions. [2020-12-22 10:29:55,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 10:29:55,512 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:55,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:55,514 INFO L225 Difference]: With dead ends: 301 [2020-12-22 10:29:55,514 INFO L226 Difference]: Without dead ends: 289 [2020-12-22 10:29:55,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=408, Invalid=998, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 10:29:55,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-12-22 10:29:55,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 163. [2020-12-22 10:29:55,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-22 10:29:55,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 434 transitions. [2020-12-22 10:29:55,519 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 434 transitions. Word has length 13 [2020-12-22 10:29:55,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:55,519 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 434 transitions. [2020-12-22 10:29:55,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:55,519 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 434 transitions. [2020-12-22 10:29:55,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:55,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:55,520 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:55,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:55,727 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:55,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:55,728 INFO L82 PathProgramCache]: Analyzing trace with hash -841628139, now seen corresponding path program 58 times [2020-12-22 10:29:55,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:55,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107562750] [2020-12-22 10:29:55,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:55,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:55,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:55,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107562750] [2020-12-22 10:29:55,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964054781] [2020-12-22 10:29:55,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:55,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:55,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:55,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:55,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:56,021 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:56,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:56,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:56,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-12-22 10:29:56,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188232602] [2020-12-22 10:29:56,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 10:29:56,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:56,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 10:29:56,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:29:56,036 INFO L87 Difference]: Start difference. First operand 163 states and 434 transitions. Second operand 15 states. [2020-12-22 10:29:56,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:56,443 INFO L93 Difference]: Finished difference Result 240 states and 593 transitions. [2020-12-22 10:29:56,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:29:56,444 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-12-22 10:29:56,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:56,445 INFO L225 Difference]: With dead ends: 240 [2020-12-22 10:29:56,446 INFO L226 Difference]: Without dead ends: 232 [2020-12-22 10:29:56,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=209, Invalid=441, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:29:56,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-12-22 10:29:56,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 162. [2020-12-22 10:29:56,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-22 10:29:56,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 429 transitions. [2020-12-22 10:29:56,450 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 429 transitions. Word has length 13 [2020-12-22 10:29:56,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:56,450 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 429 transitions. [2020-12-22 10:29:56,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 10:29:56,450 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 429 transitions. [2020-12-22 10:29:56,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:56,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:56,451 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:56,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-12-22 10:29:56,651 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:56,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:56,652 INFO L82 PathProgramCache]: Analyzing trace with hash 864112436, now seen corresponding path program 15 times [2020-12-22 10:29:56,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:56,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8235252] [2020-12-22 10:29:56,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:56,764 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:56,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8235252] [2020-12-22 10:29:56,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871079395] [2020-12-22 10:29:56,765 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:56,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 10:29:56,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:56,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:56,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:57,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:57,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:57,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974143788] [2020-12-22 10:29:57,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:57,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:57,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:57,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:57,034 INFO L87 Difference]: Start difference. First operand 162 states and 429 transitions. Second operand 17 states. [2020-12-22 10:29:57,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:57,116 INFO L93 Difference]: Finished difference Result 208 states and 526 transitions. [2020-12-22 10:29:57,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:29:57,117 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-22 10:29:57,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:57,119 INFO L225 Difference]: With dead ends: 208 [2020-12-22 10:29:57,119 INFO L226 Difference]: Without dead ends: 205 [2020-12-22 10:29:57,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:57,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-12-22 10:29:57,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 169. [2020-12-22 10:29:57,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-22 10:29:57,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 444 transitions. [2020-12-22 10:29:57,123 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 444 transitions. Word has length 13 [2020-12-22 10:29:57,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:57,123 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 444 transitions. [2020-12-22 10:29:57,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:57,123 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 444 transitions. [2020-12-22 10:29:57,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:57,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:57,124 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:57,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-12-22 10:29:57,325 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:57,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:57,325 INFO L82 PathProgramCache]: Analyzing trace with hash 263131036, now seen corresponding path program 16 times [2020-12-22 10:29:57,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:57,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376386554] [2020-12-22 10:29:57,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:57,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376386554] [2020-12-22 10:29:57,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544010414] [2020-12-22 10:29:57,442 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:57,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:57,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:57,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:57,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:57,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:57,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:57,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922865097] [2020-12-22 10:29:57,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:57,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:57,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:57,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:57,699 INFO L87 Difference]: Start difference. First operand 169 states and 444 transitions. Second operand 17 states. [2020-12-22 10:29:57,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:57,774 INFO L93 Difference]: Finished difference Result 224 states and 556 transitions. [2020-12-22 10:29:57,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 10:29:57,774 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-22 10:29:57,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:57,776 INFO L225 Difference]: With dead ends: 224 [2020-12-22 10:29:57,776 INFO L226 Difference]: Without dead ends: 221 [2020-12-22 10:29:57,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:29:57,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-12-22 10:29:57,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 168. [2020-12-22 10:29:57,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-12-22 10:29:57,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 441 transitions. [2020-12-22 10:29:57,780 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 441 transitions. Word has length 13 [2020-12-22 10:29:57,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:57,780 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 441 transitions. [2020-12-22 10:29:57,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:57,780 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 441 transitions. [2020-12-22 10:29:57,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:57,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:57,780 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:57,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-12-22 10:29:57,981 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:57,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:57,982 INFO L82 PathProgramCache]: Analyzing trace with hash -598716724, now seen corresponding path program 17 times [2020-12-22 10:29:57,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:57,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227056392] [2020-12-22 10:29:57,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:58,100 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:58,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227056392] [2020-12-22 10:29:58,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273462121] [2020-12-22 10:29:58,101 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:58,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 10:29:58,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:58,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:58,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:58,356 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:58,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:58,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:58,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156089038] [2020-12-22 10:29:58,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:58,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:58,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:58,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:58,359 INFO L87 Difference]: Start difference. First operand 168 states and 441 transitions. Second operand 17 states. [2020-12-22 10:29:58,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:58,482 INFO L93 Difference]: Finished difference Result 221 states and 548 transitions. [2020-12-22 10:29:58,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 10:29:58,483 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-22 10:29:58,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:58,485 INFO L225 Difference]: With dead ends: 221 [2020-12-22 10:29:58,485 INFO L226 Difference]: Without dead ends: 218 [2020-12-22 10:29:58,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:29:58,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-12-22 10:29:58,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 167. [2020-12-22 10:29:58,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-22 10:29:58,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 438 transitions. [2020-12-22 10:29:58,489 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 438 transitions. Word has length 13 [2020-12-22 10:29:58,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:58,489 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 438 transitions. [2020-12-22 10:29:58,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:58,489 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 438 transitions. [2020-12-22 10:29:58,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:58,490 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:58,490 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:58,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:58,700 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:58,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:58,701 INFO L82 PathProgramCache]: Analyzing trace with hash 66218396, now seen corresponding path program 18 times [2020-12-22 10:29:58,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:58,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111585666] [2020-12-22 10:29:58,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:58,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:58,812 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:58,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111585666] [2020-12-22 10:29:58,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964310051] [2020-12-22 10:29:58,813 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:58,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-22 10:29:58,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:58,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:58,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:59,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:59,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:59,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305154271] [2020-12-22 10:29:59,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:59,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:59,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:59,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:59,055 INFO L87 Difference]: Start difference. First operand 167 states and 438 transitions. Second operand 17 states. [2020-12-22 10:29:59,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:59,202 INFO L93 Difference]: Finished difference Result 220 states and 544 transitions. [2020-12-22 10:29:59,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:29:59,203 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-22 10:29:59,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:59,205 INFO L225 Difference]: With dead ends: 220 [2020-12-22 10:29:59,205 INFO L226 Difference]: Without dead ends: 217 [2020-12-22 10:29:59,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:29:59,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-12-22 10:29:59,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 167. [2020-12-22 10:29:59,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-22 10:29:59,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 438 transitions. [2020-12-22 10:29:59,211 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 438 transitions. Word has length 13 [2020-12-22 10:29:59,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:59,211 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 438 transitions. [2020-12-22 10:29:59,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:59,211 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 438 transitions. [2020-12-22 10:29:59,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:59,212 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:59,212 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:59,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:59,422 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:59,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:59,422 INFO L82 PathProgramCache]: Analyzing trace with hash 87667916, now seen corresponding path program 19 times [2020-12-22 10:29:59,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:59,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706893446] [2020-12-22 10:29:59,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:59,523 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:59,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706893446] [2020-12-22 10:29:59,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286359862] [2020-12-22 10:29:59,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:59,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:59,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:59,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:59,762 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:59,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:59,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:59,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230503275] [2020-12-22 10:29:59,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:59,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:59,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:59,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:59,764 INFO L87 Difference]: Start difference. First operand 167 states and 438 transitions. Second operand 17 states. [2020-12-22 10:29:59,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:59,947 INFO L93 Difference]: Finished difference Result 219 states and 544 transitions. [2020-12-22 10:29:59,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 10:29:59,948 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-22 10:29:59,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:59,950 INFO L225 Difference]: With dead ends: 219 [2020-12-22 10:29:59,950 INFO L226 Difference]: Without dead ends: 216 [2020-12-22 10:29:59,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:29:59,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-12-22 10:29:59,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 169. [2020-12-22 10:29:59,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-22 10:29:59,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 445 transitions. [2020-12-22 10:29:59,954 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 445 transitions. Word has length 13 [2020-12-22 10:29:59,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:59,954 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 445 transitions. [2020-12-22 10:29:59,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:59,954 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 445 transitions. [2020-12-22 10:29:59,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:59,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:59,955 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:00,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:00,157 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:00,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:00,157 INFO L82 PathProgramCache]: Analyzing trace with hash 88359836, now seen corresponding path program 20 times [2020-12-22 10:30:00,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:00,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657680887] [2020-12-22 10:30:00,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:00,264 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:00,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657680887] [2020-12-22 10:30:00,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16973717] [2020-12-22 10:30:00,265 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:00,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:30:00,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:00,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:00,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:00,510 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:00,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:00,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:00,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411000623] [2020-12-22 10:30:00,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:00,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:00,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:00,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:00,512 INFO L87 Difference]: Start difference. First operand 169 states and 445 transitions. Second operand 17 states. [2020-12-22 10:30:00,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:00,741 INFO L93 Difference]: Finished difference Result 218 states and 544 transitions. [2020-12-22 10:30:00,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:30:00,742 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-22 10:30:00,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:00,743 INFO L225 Difference]: With dead ends: 218 [2020-12-22 10:30:00,744 INFO L226 Difference]: Without dead ends: 215 [2020-12-22 10:30:00,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:30:00,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-12-22 10:30:00,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 171. [2020-12-22 10:30:00,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-22 10:30:00,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 452 transitions. [2020-12-22 10:30:00,747 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 452 transitions. Word has length 13 [2020-12-22 10:30:00,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:00,748 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 452 transitions. [2020-12-22 10:30:00,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:00,748 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 452 transitions. [2020-12-22 10:30:00,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:30:00,748 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:00,748 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:00,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:00,949 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:00,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:00,950 INFO L82 PathProgramCache]: Analyzing trace with hash 88382156, now seen corresponding path program 21 times [2020-12-22 10:30:00,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:00,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549767856] [2020-12-22 10:30:00,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:01,077 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:01,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549767856] [2020-12-22 10:30:01,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145697396] [2020-12-22 10:30:01,078 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:01,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 10:30:01,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:01,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:01,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:01,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:01,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:30:01,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921800986] [2020-12-22 10:30:01,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:30:01,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:01,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:30:01,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:30:01,340 INFO L87 Difference]: Start difference. First operand 171 states and 452 transitions. Second operand 18 states. [2020-12-22 10:30:01,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:01,770 INFO L93 Difference]: Finished difference Result 243 states and 606 transitions. [2020-12-22 10:30:01,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:30:01,771 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-12-22 10:30:01,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:01,773 INFO L225 Difference]: With dead ends: 243 [2020-12-22 10:30:01,774 INFO L226 Difference]: Without dead ends: 231 [2020-12-22 10:30:01,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:30:01,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-12-22 10:30:01,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 175. [2020-12-22 10:30:01,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-22 10:30:01,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 468 transitions. [2020-12-22 10:30:01,780 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 468 transitions. Word has length 13 [2020-12-22 10:30:01,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:01,780 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 468 transitions. [2020-12-22 10:30:01,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:30:01,780 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 468 transitions. [2020-12-22 10:30:01,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:01,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:01,781 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:01,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2020-12-22 10:30:01,982 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:01,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:01,983 INFO L82 PathProgramCache]: Analyzing trace with hash -2124969700, now seen corresponding path program 59 times [2020-12-22 10:30:01,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:01,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926554864] [2020-12-22 10:30:01,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:02,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926554864] [2020-12-22 10:30:02,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557634952] [2020-12-22 10:30:02,098 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:02,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:30:02,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:02,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:02,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:02,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:02,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:02,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516508664] [2020-12-22 10:30:02,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:02,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:02,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:02,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:02,451 INFO L87 Difference]: Start difference. First operand 175 states and 468 transitions. Second operand 17 states. [2020-12-22 10:30:02,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:02,864 INFO L93 Difference]: Finished difference Result 250 states and 614 transitions. [2020-12-22 10:30:02,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:30:02,865 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:02,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:02,867 INFO L225 Difference]: With dead ends: 250 [2020-12-22 10:30:02,868 INFO L226 Difference]: Without dead ends: 248 [2020-12-22 10:30:02,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:30:02,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-12-22 10:30:02,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 179. [2020-12-22 10:30:02,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-22 10:30:02,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 474 transitions. [2020-12-22 10:30:02,873 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 474 transitions. Word has length 14 [2020-12-22 10:30:02,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:02,873 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 474 transitions. [2020-12-22 10:30:02,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:02,873 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 474 transitions. [2020-12-22 10:30:02,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:02,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:02,874 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:03,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:03,090 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:03,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:03,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1771052620, now seen corresponding path program 60 times [2020-12-22 10:30:03,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:03,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793246380] [2020-12-22 10:30:03,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:03,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:03,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793246380] [2020-12-22 10:30:03,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788587269] [2020-12-22 10:30:03,198 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:03,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:30:03,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:03,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:03,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:03,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:03,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:03,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:03,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346704267] [2020-12-22 10:30:03,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:03,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:03,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:03,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:03,523 INFO L87 Difference]: Start difference. First operand 179 states and 474 transitions. Second operand 17 states. [2020-12-22 10:30:04,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:04,010 INFO L93 Difference]: Finished difference Result 258 states and 634 transitions. [2020-12-22 10:30:04,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:30:04,011 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:04,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:04,013 INFO L225 Difference]: With dead ends: 258 [2020-12-22 10:30:04,013 INFO L226 Difference]: Without dead ends: 256 [2020-12-22 10:30:04,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=499, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:30:04,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-12-22 10:30:04,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 181. [2020-12-22 10:30:04,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-22 10:30:04,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 481 transitions. [2020-12-22 10:30:04,018 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 481 transitions. Word has length 14 [2020-12-22 10:30:04,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:04,018 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 481 transitions. [2020-12-22 10:30:04,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:04,018 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 481 transitions. [2020-12-22 10:30:04,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:04,019 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:04,019 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:04,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:04,220 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:04,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:04,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1770447190, now seen corresponding path program 61 times [2020-12-22 10:30:04,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:04,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996986911] [2020-12-22 10:30:04,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:04,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996986911] [2020-12-22 10:30:04,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718434442] [2020-12-22 10:30:04,335 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:04,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:04,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:04,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:04,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:04,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694235608] [2020-12-22 10:30:04,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:04,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:04,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:04,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:04,646 INFO L87 Difference]: Start difference. First operand 181 states and 481 transitions. Second operand 17 states. [2020-12-22 10:30:05,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:05,240 INFO L93 Difference]: Finished difference Result 260 states and 645 transitions. [2020-12-22 10:30:05,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:30:05,240 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:05,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:05,243 INFO L225 Difference]: With dead ends: 260 [2020-12-22 10:30:05,243 INFO L226 Difference]: Without dead ends: 258 [2020-12-22 10:30:05,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:30:05,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-12-22 10:30:05,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 183. [2020-12-22 10:30:05,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-12-22 10:30:05,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 488 transitions. [2020-12-22 10:30:05,247 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 488 transitions. Word has length 14 [2020-12-22 10:30:05,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:05,247 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 488 transitions. [2020-12-22 10:30:05,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:05,247 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 488 transitions. [2020-12-22 10:30:05,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:05,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:05,248 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:05,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:05,452 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:05,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:05,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1770427753, now seen corresponding path program 62 times [2020-12-22 10:30:05,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:05,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076306848] [2020-12-22 10:30:05,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:05,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:05,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076306848] [2020-12-22 10:30:05,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376095298] [2020-12-22 10:30:05,575 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:05,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:30:05,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:05,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:05,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:05,854 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:05,857 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:30:05,858 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:05,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:05,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:05,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426019947] [2020-12-22 10:30:05,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:05,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:05,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:05,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:05,875 INFO L87 Difference]: Start difference. First operand 183 states and 488 transitions. Second operand 17 states. [2020-12-22 10:30:06,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:06,751 INFO L93 Difference]: Finished difference Result 272 states and 675 transitions. [2020-12-22 10:30:06,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 10:30:06,752 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:06,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:06,754 INFO L225 Difference]: With dead ends: 272 [2020-12-22 10:30:06,754 INFO L226 Difference]: Without dead ends: 264 [2020-12-22 10:30:06,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 10:30:06,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-12-22 10:30:06,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 184. [2020-12-22 10:30:06,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-22 10:30:06,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 493 transitions. [2020-12-22 10:30:06,758 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 493 transitions. Word has length 14 [2020-12-22 10:30:06,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:06,758 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 493 transitions. [2020-12-22 10:30:06,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:06,759 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 493 transitions. [2020-12-22 10:30:06,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:06,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:06,759 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:06,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:06,962 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:06,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:06,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1770424870, now seen corresponding path program 63 times [2020-12-22 10:30:06,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:06,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001873717] [2020-12-22 10:30:06,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:06,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:07,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001873717] [2020-12-22 10:30:07,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832011982] [2020-12-22 10:30:07,081 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:07,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:30:07,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:07,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:07,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:07,389 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:30:07,391 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 10:30:07,393 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:07,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:07,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:30:07,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104024421] [2020-12-22 10:30:07,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:30:07,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:07,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:30:07,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:30:07,431 INFO L87 Difference]: Start difference. First operand 184 states and 493 transitions. Second operand 18 states. [2020-12-22 10:30:08,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:08,370 INFO L93 Difference]: Finished difference Result 327 states and 800 transitions. [2020-12-22 10:30:08,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:30:08,371 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:30:08,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:08,374 INFO L225 Difference]: With dead ends: 327 [2020-12-22 10:30:08,374 INFO L226 Difference]: Without dead ends: 315 [2020-12-22 10:30:08,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=417, Invalid=989, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 10:30:08,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-12-22 10:30:08,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 180. [2020-12-22 10:30:08,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-22 10:30:08,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 489 transitions. [2020-12-22 10:30:08,379 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 489 transitions. Word has length 14 [2020-12-22 10:30:08,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:08,379 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 489 transitions. [2020-12-22 10:30:08,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:30:08,379 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 489 transitions. [2020-12-22 10:30:08,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:08,379 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:08,379 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:08,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-12-22 10:30:08,580 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:08,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:08,581 INFO L82 PathProgramCache]: Analyzing trace with hash -2044516979, now seen corresponding path program 64 times [2020-12-22 10:30:08,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:08,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735809744] [2020-12-22 10:30:08,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:08,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:08,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735809744] [2020-12-22 10:30:08,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108143229] [2020-12-22 10:30:08,717 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:08,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:30:08,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:08,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:08,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:09,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:09,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:09,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695949435] [2020-12-22 10:30:09,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:09,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:09,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:09,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:09,003 INFO L87 Difference]: Start difference. First operand 180 states and 489 transitions. Second operand 17 states. [2020-12-22 10:30:09,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:09,520 INFO L93 Difference]: Finished difference Result 265 states and 657 transitions. [2020-12-22 10:30:09,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:30:09,521 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:09,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:09,524 INFO L225 Difference]: With dead ends: 265 [2020-12-22 10:30:09,524 INFO L226 Difference]: Without dead ends: 263 [2020-12-22 10:30:09,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:30:09,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-12-22 10:30:09,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 185. [2020-12-22 10:30:09,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-22 10:30:09,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 498 transitions. [2020-12-22 10:30:09,530 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 498 transitions. Word has length 14 [2020-12-22 10:30:09,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:09,530 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 498 transitions. [2020-12-22 10:30:09,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:09,530 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 498 transitions. [2020-12-22 10:30:09,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:09,531 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:09,531 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:09,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-12-22 10:30:09,740 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:09,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:09,740 INFO L82 PathProgramCache]: Analyzing trace with hash 336977909, now seen corresponding path program 65 times [2020-12-22 10:30:09,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:09,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912158770] [2020-12-22 10:30:09,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:09,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:09,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:09,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912158770] [2020-12-22 10:30:09,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108797166] [2020-12-22 10:30:09,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:09,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:30:09,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:09,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:09,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:10,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:10,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:10,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:10,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042559240] [2020-12-22 10:30:10,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:10,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:10,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:10,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:10,187 INFO L87 Difference]: Start difference. First operand 185 states and 498 transitions. Second operand 17 states. [2020-12-22 10:30:10,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:10,703 INFO L93 Difference]: Finished difference Result 266 states and 657 transitions. [2020-12-22 10:30:10,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:30:10,704 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:10,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:10,706 INFO L225 Difference]: With dead ends: 266 [2020-12-22 10:30:10,706 INFO L226 Difference]: Without dead ends: 264 [2020-12-22 10:30:10,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:30:10,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-12-22 10:30:10,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 185. [2020-12-22 10:30:10,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-22 10:30:10,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 497 transitions. [2020-12-22 10:30:10,711 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 497 transitions. Word has length 14 [2020-12-22 10:30:10,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:10,712 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 497 transitions. [2020-12-22 10:30:10,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:10,712 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 497 transitions. [2020-12-22 10:30:10,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:10,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:10,713 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:10,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:10,928 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:10,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:10,928 INFO L82 PathProgramCache]: Analyzing trace with hash 358427429, now seen corresponding path program 66 times [2020-12-22 10:30:10,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:10,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706364830] [2020-12-22 10:30:10,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:10,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:11,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:11,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706364830] [2020-12-22 10:30:11,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699970272] [2020-12-22 10:30:11,051 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:11,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:30:11,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:11,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:11,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:11,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:11,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:11,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:11,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581346692] [2020-12-22 10:30:11,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:11,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:11,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:11,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:11,383 INFO L87 Difference]: Start difference. First operand 185 states and 497 transitions. Second operand 17 states. [2020-12-22 10:30:12,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:12,044 INFO L93 Difference]: Finished difference Result 283 states and 697 transitions. [2020-12-22 10:30:12,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:30:12,045 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:12,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:12,048 INFO L225 Difference]: With dead ends: 283 [2020-12-22 10:30:12,048 INFO L226 Difference]: Without dead ends: 281 [2020-12-22 10:30:12,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2020-12-22 10:30:12,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-12-22 10:30:12,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 187. [2020-12-22 10:30:12,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-22 10:30:12,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 504 transitions. [2020-12-22 10:30:12,058 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 504 transitions. Word has length 14 [2020-12-22 10:30:12,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:12,058 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 504 transitions. [2020-12-22 10:30:12,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:12,058 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 504 transitions. [2020-12-22 10:30:12,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:12,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:12,059 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:12,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:12,260 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:12,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:12,260 INFO L82 PathProgramCache]: Analyzing trace with hash 359032859, now seen corresponding path program 67 times [2020-12-22 10:30:12,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:12,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048150163] [2020-12-22 10:30:12,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:12,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048150163] [2020-12-22 10:30:12,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459892683] [2020-12-22 10:30:12,396 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:12,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:12,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:12,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:12,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:12,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:12,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232445483] [2020-12-22 10:30:12,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:12,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:12,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:12,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:12,753 INFO L87 Difference]: Start difference. First operand 187 states and 504 transitions. Second operand 17 states. [2020-12-22 10:30:13,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:13,510 INFO L93 Difference]: Finished difference Result 272 states and 675 transitions. [2020-12-22 10:30:13,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 10:30:13,511 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:13,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:13,513 INFO L225 Difference]: With dead ends: 272 [2020-12-22 10:30:13,514 INFO L226 Difference]: Without dead ends: 270 [2020-12-22 10:30:13,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=287, Invalid=643, Unknown=0, NotChecked=0, Total=930 [2020-12-22 10:30:13,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-12-22 10:30:13,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 189. [2020-12-22 10:30:13,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-22 10:30:13,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 511 transitions. [2020-12-22 10:30:13,519 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 511 transitions. Word has length 14 [2020-12-22 10:30:13,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:13,520 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 511 transitions. [2020-12-22 10:30:13,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:13,520 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 511 transitions. [2020-12-22 10:30:13,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:13,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:13,520 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:13,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:13,725 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:13,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:13,725 INFO L82 PathProgramCache]: Analyzing trace with hash 359052296, now seen corresponding path program 68 times [2020-12-22 10:30:13,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:13,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645410797] [2020-12-22 10:30:13,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:13,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645410797] [2020-12-22 10:30:13,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855688383] [2020-12-22 10:30:13,853 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:13,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:30:13,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:13,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:13,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:14,159 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:14,162 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:30:14,163 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:14,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:14,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:14,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:14,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354618021] [2020-12-22 10:30:14,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:14,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:14,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:14,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:14,185 INFO L87 Difference]: Start difference. First operand 189 states and 511 transitions. Second operand 17 states. [2020-12-22 10:30:15,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:15,369 INFO L93 Difference]: Finished difference Result 289 states and 724 transitions. [2020-12-22 10:30:15,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 10:30:15,370 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:15,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:15,372 INFO L225 Difference]: With dead ends: 289 [2020-12-22 10:30:15,372 INFO L226 Difference]: Without dead ends: 281 [2020-12-22 10:30:15,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 10:30:15,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-12-22 10:30:15,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 190. [2020-12-22 10:30:15,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-12-22 10:30:15,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 516 transitions. [2020-12-22 10:30:15,378 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 516 transitions. Word has length 14 [2020-12-22 10:30:15,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:15,379 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 516 transitions. [2020-12-22 10:30:15,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:15,380 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 516 transitions. [2020-12-22 10:30:15,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:15,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:15,381 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:15,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:15,583 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:15,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:15,584 INFO L82 PathProgramCache]: Analyzing trace with hash 359055179, now seen corresponding path program 69 times [2020-12-22 10:30:15,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:15,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700792939] [2020-12-22 10:30:15,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:15,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700792939] [2020-12-22 10:30:15,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076012100] [2020-12-22 10:30:15,726 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:15,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:30:15,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:15,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:15,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:16,070 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:30:16,072 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 10:30:16,075 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 10:30:16,078 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:16,081 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:16,083 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:30:16,085 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:30:16,089 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:16,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:16,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:30:16,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680069815] [2020-12-22 10:30:16,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:30:16,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:16,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:30:16,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:30:16,171 INFO L87 Difference]: Start difference. First operand 190 states and 516 transitions. Second operand 18 states. [2020-12-22 10:30:17,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:17,494 INFO L93 Difference]: Finished difference Result 327 states and 813 transitions. [2020-12-22 10:30:17,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 10:30:17,495 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:30:17,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:17,498 INFO L225 Difference]: With dead ends: 327 [2020-12-22 10:30:17,498 INFO L226 Difference]: Without dead ends: 315 [2020-12-22 10:30:17,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=477, Invalid=1163, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 10:30:17,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-12-22 10:30:17,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 181. [2020-12-22 10:30:17,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-22 10:30:17,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 494 transitions. [2020-12-22 10:30:17,504 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 494 transitions. Word has length 14 [2020-12-22 10:30:17,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:17,504 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 494 transitions. [2020-12-22 10:30:17,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:30:17,504 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 494 transitions. [2020-12-22 10:30:17,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:17,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:17,505 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:17,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:17,705 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:17,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:17,706 INFO L82 PathProgramCache]: Analyzing trace with hash 446657436, now seen corresponding path program 70 times [2020-12-22 10:30:17,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:17,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291493374] [2020-12-22 10:30:17,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:17,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:17,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291493374] [2020-12-22 10:30:17,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898511298] [2020-12-22 10:30:17,853 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:17,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:30:17,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:17,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:17,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:18,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:18,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:18,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139769085] [2020-12-22 10:30:18,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:18,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:18,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:18,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:18,163 INFO L87 Difference]: Start difference. First operand 181 states and 494 transitions. Second operand 17 states. [2020-12-22 10:30:18,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:18,681 INFO L93 Difference]: Finished difference Result 257 states and 649 transitions. [2020-12-22 10:30:18,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:30:18,682 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:18,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:18,683 INFO L225 Difference]: With dead ends: 257 [2020-12-22 10:30:18,683 INFO L226 Difference]: Without dead ends: 255 [2020-12-22 10:30:18,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:30:18,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-12-22 10:30:18,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 182. [2020-12-22 10:30:18,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-22 10:30:18,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 497 transitions. [2020-12-22 10:30:18,688 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 497 transitions. Word has length 14 [2020-12-22 10:30:18,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:18,688 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 497 transitions. [2020-12-22 10:30:18,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:18,688 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 497 transitions. [2020-12-22 10:30:18,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:18,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:18,689 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:18,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:18,890 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:18,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:18,890 INFO L82 PathProgramCache]: Analyzing trace with hash 446660319, now seen corresponding path program 71 times [2020-12-22 10:30:18,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:18,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602378530] [2020-12-22 10:30:18,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:19,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602378530] [2020-12-22 10:30:19,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908108283] [2020-12-22 10:30:19,042 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:19,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:30:19,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:19,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:19,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:19,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:19,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:19,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:19,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464202413] [2020-12-22 10:30:19,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:19,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:19,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:19,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:19,364 INFO L87 Difference]: Start difference. First operand 182 states and 497 transitions. Second operand 17 states. [2020-12-22 10:30:19,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:19,935 INFO L93 Difference]: Finished difference Result 263 states and 660 transitions. [2020-12-22 10:30:19,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:30:19,936 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:19,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:19,937 INFO L225 Difference]: With dead ends: 263 [2020-12-22 10:30:19,938 INFO L226 Difference]: Without dead ends: 261 [2020-12-22 10:30:19,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:30:19,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-12-22 10:30:19,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 183. [2020-12-22 10:30:19,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-12-22 10:30:19,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 500 transitions. [2020-12-22 10:30:19,942 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 500 transitions. Word has length 14 [2020-12-22 10:30:19,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:19,942 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 500 transitions. [2020-12-22 10:30:19,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:19,943 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 500 transitions. [2020-12-22 10:30:19,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:19,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:19,943 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:20,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:20,144 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:20,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:20,145 INFO L82 PathProgramCache]: Analyzing trace with hash 446746809, now seen corresponding path program 72 times [2020-12-22 10:30:20,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:20,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814034899] [2020-12-22 10:30:20,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:20,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:20,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814034899] [2020-12-22 10:30:20,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533005000] [2020-12-22 10:30:20,291 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:20,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:30:20,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:20,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:20,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:20,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:20,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:20,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787363717] [2020-12-22 10:30:20,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:20,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:20,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:20,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:20,556 INFO L87 Difference]: Start difference. First operand 183 states and 500 transitions. Second operand 17 states. [2020-12-22 10:30:21,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:21,032 INFO L93 Difference]: Finished difference Result 263 states and 658 transitions. [2020-12-22 10:30:21,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:30:21,033 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:21,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:21,035 INFO L225 Difference]: With dead ends: 263 [2020-12-22 10:30:21,035 INFO L226 Difference]: Without dead ends: 261 [2020-12-22 10:30:21,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:30:21,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-12-22 10:30:21,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 184. [2020-12-22 10:30:21,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-22 10:30:21,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 503 transitions. [2020-12-22 10:30:21,041 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 503 transitions. Word has length 14 [2020-12-22 10:30:21,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:21,042 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 503 transitions. [2020-12-22 10:30:21,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:21,042 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 503 transitions. [2020-12-22 10:30:21,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:21,042 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:21,042 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:21,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-12-22 10:30:21,245 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:21,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:21,245 INFO L82 PathProgramCache]: Analyzing trace with hash 449520255, now seen corresponding path program 73 times [2020-12-22 10:30:21,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:21,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590821328] [2020-12-22 10:30:21,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:21,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590821328] [2020-12-22 10:30:21,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090769755] [2020-12-22 10:30:21,418 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:21,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:21,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:21,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:21,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:21,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:21,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261994149] [2020-12-22 10:30:21,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:21,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:21,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:21,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:21,729 INFO L87 Difference]: Start difference. First operand 184 states and 503 transitions. Second operand 17 states. [2020-12-22 10:30:22,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:22,152 INFO L93 Difference]: Finished difference Result 253 states and 639 transitions. [2020-12-22 10:30:22,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:30:22,153 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:22,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:22,154 INFO L225 Difference]: With dead ends: 253 [2020-12-22 10:30:22,154 INFO L226 Difference]: Without dead ends: 251 [2020-12-22 10:30:22,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-12-22 10:30:22,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-12-22 10:30:22,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 188. [2020-12-22 10:30:22,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-22 10:30:22,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 507 transitions. [2020-12-22 10:30:22,158 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 507 transitions. Word has length 14 [2020-12-22 10:30:22,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:22,159 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 507 transitions. [2020-12-22 10:30:22,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:22,159 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 507 transitions. [2020-12-22 10:30:22,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:22,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:22,159 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:22,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:22,360 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:22,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:22,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1258554932, now seen corresponding path program 74 times [2020-12-22 10:30:22,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:22,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941431078] [2020-12-22 10:30:22,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:22,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941431078] [2020-12-22 10:30:22,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332516438] [2020-12-22 10:30:22,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:22,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:30:22,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:22,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:22,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:22,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:22,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:22,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:22,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155294215] [2020-12-22 10:30:22,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:22,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:22,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:22,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:22,774 INFO L87 Difference]: Start difference. First operand 188 states and 507 transitions. Second operand 17 states. [2020-12-22 10:30:23,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:23,318 INFO L93 Difference]: Finished difference Result 277 states and 687 transitions. [2020-12-22 10:30:23,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:30:23,319 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:23,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:23,321 INFO L225 Difference]: With dead ends: 277 [2020-12-22 10:30:23,321 INFO L226 Difference]: Without dead ends: 275 [2020-12-22 10:30:23,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2020-12-22 10:30:23,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-12-22 10:30:23,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 188. [2020-12-22 10:30:23,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-22 10:30:23,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 507 transitions. [2020-12-22 10:30:23,325 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 507 transitions. Word has length 14 [2020-12-22 10:30:23,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:23,325 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 507 transitions. [2020-12-22 10:30:23,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:23,325 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 507 transitions. [2020-12-22 10:30:23,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:23,325 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:23,326 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:23,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-12-22 10:30:23,528 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:23,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:23,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1258557815, now seen corresponding path program 75 times [2020-12-22 10:30:23,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:23,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184621853] [2020-12-22 10:30:23,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:23,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184621853] [2020-12-22 10:30:23,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428167985] [2020-12-22 10:30:23,655 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:23,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:30:23,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:23,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:23,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:23,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:23,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:23,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333833242] [2020-12-22 10:30:23,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:23,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:23,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:23,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:23,949 INFO L87 Difference]: Start difference. First operand 188 states and 507 transitions. Second operand 17 states. [2020-12-22 10:30:24,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:24,509 INFO L93 Difference]: Finished difference Result 280 states and 693 transitions. [2020-12-22 10:30:24,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:30:24,510 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:24,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:24,511 INFO L225 Difference]: With dead ends: 280 [2020-12-22 10:30:24,512 INFO L226 Difference]: Without dead ends: 278 [2020-12-22 10:30:24,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=211, Invalid=545, Unknown=0, NotChecked=0, Total=756 [2020-12-22 10:30:24,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-12-22 10:30:24,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 189. [2020-12-22 10:30:24,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-22 10:30:24,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 510 transitions. [2020-12-22 10:30:24,517 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 510 transitions. Word has length 14 [2020-12-22 10:30:24,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:24,517 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 510 transitions. [2020-12-22 10:30:24,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:24,517 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 510 transitions. [2020-12-22 10:30:24,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:24,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:24,518 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:24,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:24,720 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:24,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:24,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1258644305, now seen corresponding path program 76 times [2020-12-22 10:30:24,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:24,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821733651] [2020-12-22 10:30:24,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:24,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:24,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:24,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821733651] [2020-12-22 10:30:24,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93280979] [2020-12-22 10:30:24,864 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:24,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:30:24,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:24,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:24,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:25,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:25,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:25,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147081651] [2020-12-22 10:30:25,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:25,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:25,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:25,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:25,173 INFO L87 Difference]: Start difference. First operand 189 states and 510 transitions. Second operand 17 states. [2020-12-22 10:30:25,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:25,679 INFO L93 Difference]: Finished difference Result 274 states and 681 transitions. [2020-12-22 10:30:25,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:30:25,680 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:25,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:25,681 INFO L225 Difference]: With dead ends: 274 [2020-12-22 10:30:25,681 INFO L226 Difference]: Without dead ends: 272 [2020-12-22 10:30:25,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:30:25,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-12-22 10:30:25,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 189. [2020-12-22 10:30:25,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-22 10:30:25,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 510 transitions. [2020-12-22 10:30:25,687 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 510 transitions. Word has length 14 [2020-12-22 10:30:25,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:25,688 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 510 transitions. [2020-12-22 10:30:25,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:25,688 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 510 transitions. [2020-12-22 10:30:25,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:25,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:25,689 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:25,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-12-22 10:30:25,890 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:25,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:25,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1261417751, now seen corresponding path program 77 times [2020-12-22 10:30:25,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:25,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038295542] [2020-12-22 10:30:25,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:25,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:26,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:26,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038295542] [2020-12-22 10:30:26,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292314926] [2020-12-22 10:30:26,025 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:26,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:30:26,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:26,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:26,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:26,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:26,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:26,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520086110] [2020-12-22 10:30:26,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:26,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:26,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:26,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:26,332 INFO L87 Difference]: Start difference. First operand 189 states and 510 transitions. Second operand 17 states. [2020-12-22 10:30:26,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:26,772 INFO L93 Difference]: Finished difference Result 259 states and 648 transitions. [2020-12-22 10:30:26,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:30:26,773 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:26,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:26,774 INFO L225 Difference]: With dead ends: 259 [2020-12-22 10:30:26,774 INFO L226 Difference]: Without dead ends: 257 [2020-12-22 10:30:26,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:30:26,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-12-22 10:30:26,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 188. [2020-12-22 10:30:26,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-22 10:30:26,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 506 transitions. [2020-12-22 10:30:26,780 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 506 transitions. Word has length 14 [2020-12-22 10:30:26,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:26,780 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 506 transitions. [2020-12-22 10:30:26,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:26,780 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 506 transitions. [2020-12-22 10:30:26,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:26,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:26,781 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:26,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-12-22 10:30:26,984 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:26,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:26,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1840373162, now seen corresponding path program 78 times [2020-12-22 10:30:26,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:26,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342121865] [2020-12-22 10:30:26,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:27,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:27,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342121865] [2020-12-22 10:30:27,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184795734] [2020-12-22 10:30:27,119 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:27,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:30:27,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:27,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:27,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:27,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:27,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:27,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:27,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236510122] [2020-12-22 10:30:27,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:27,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:27,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:27,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:27,433 INFO L87 Difference]: Start difference. First operand 188 states and 506 transitions. Second operand 17 states. [2020-12-22 10:30:28,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:28,243 INFO L93 Difference]: Finished difference Result 281 states and 693 transitions. [2020-12-22 10:30:28,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 10:30:28,244 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:28,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:28,245 INFO L225 Difference]: With dead ends: 281 [2020-12-22 10:30:28,245 INFO L226 Difference]: Without dead ends: 279 [2020-12-22 10:30:28,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 10:30:28,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-12-22 10:30:28,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 187. [2020-12-22 10:30:28,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-22 10:30:28,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 503 transitions. [2020-12-22 10:30:28,249 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 503 transitions. Word has length 14 [2020-12-22 10:30:28,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:28,250 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 503 transitions. [2020-12-22 10:30:28,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:28,250 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 503 transitions. [2020-12-22 10:30:28,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:28,250 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:28,250 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:28,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-12-22 10:30:28,451 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:28,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:28,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1840376045, now seen corresponding path program 79 times [2020-12-22 10:30:28,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:28,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694383991] [2020-12-22 10:30:28,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:28,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:28,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694383991] [2020-12-22 10:30:28,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894715194] [2020-12-22 10:30:28,580 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:28,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:28,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:28,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:28,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:28,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:28,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048793249] [2020-12-22 10:30:28,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:28,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:28,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:28,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:28,892 INFO L87 Difference]: Start difference. First operand 187 states and 503 transitions. Second operand 17 states. [2020-12-22 10:30:29,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:29,672 INFO L93 Difference]: Finished difference Result 281 states and 689 transitions. [2020-12-22 10:30:29,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 10:30:29,673 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:29,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:29,674 INFO L225 Difference]: With dead ends: 281 [2020-12-22 10:30:29,675 INFO L226 Difference]: Without dead ends: 279 [2020-12-22 10:30:29,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=281, Invalid=711, Unknown=0, NotChecked=0, Total=992 [2020-12-22 10:30:29,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-12-22 10:30:29,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 188. [2020-12-22 10:30:29,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-22 10:30:29,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 506 transitions. [2020-12-22 10:30:29,679 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 506 transitions. Word has length 14 [2020-12-22 10:30:29,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:29,679 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 506 transitions. [2020-12-22 10:30:29,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:29,679 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 506 transitions. [2020-12-22 10:30:29,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:29,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:29,680 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:29,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:29,880 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:29,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:29,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1840462535, now seen corresponding path program 80 times [2020-12-22 10:30:29,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:29,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299504172] [2020-12-22 10:30:29,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:30,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:30,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299504172] [2020-12-22 10:30:30,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079477856] [2020-12-22 10:30:30,009 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:30,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:30:30,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:30,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:30,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:30,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:30,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:30,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702554856] [2020-12-22 10:30:30,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:30,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:30,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:30,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:30,312 INFO L87 Difference]: Start difference. First operand 188 states and 506 transitions. Second operand 17 states. [2020-12-22 10:30:30,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:30,939 INFO L93 Difference]: Finished difference Result 274 states and 674 transitions. [2020-12-22 10:30:30,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:30:30,940 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:30,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:30,941 INFO L225 Difference]: With dead ends: 274 [2020-12-22 10:30:30,941 INFO L226 Difference]: Without dead ends: 272 [2020-12-22 10:30:30,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2020-12-22 10:30:30,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-12-22 10:30:30,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 187. [2020-12-22 10:30:30,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-22 10:30:30,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 503 transitions. [2020-12-22 10:30:30,947 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 503 transitions. Word has length 14 [2020-12-22 10:30:30,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:30,947 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 503 transitions. [2020-12-22 10:30:30,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:30,947 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 503 transitions. [2020-12-22 10:30:30,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:30,948 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:30,948 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:31,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-12-22 10:30:31,163 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:31,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:31,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1859141492, now seen corresponding path program 81 times [2020-12-22 10:30:31,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:31,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318300410] [2020-12-22 10:30:31,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:31,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318300410] [2020-12-22 10:30:31,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121925766] [2020-12-22 10:30:31,281 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:31,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:30:31,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:31,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 10:30:31,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:31,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:31,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-22 10:30:31,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463980827] [2020-12-22 10:30:31,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:30:31,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:31,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:30:31,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:30:31,521 INFO L87 Difference]: Start difference. First operand 187 states and 503 transitions. Second operand 16 states. [2020-12-22 10:30:32,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:32,169 INFO L93 Difference]: Finished difference Result 275 states and 681 transitions. [2020-12-22 10:30:32,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:30:32,170 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2020-12-22 10:30:32,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:32,171 INFO L225 Difference]: With dead ends: 275 [2020-12-22 10:30:32,171 INFO L226 Difference]: Without dead ends: 273 [2020-12-22 10:30:32,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:30:32,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-12-22 10:30:32,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 188. [2020-12-22 10:30:32,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-22 10:30:32,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 508 transitions. [2020-12-22 10:30:32,176 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 508 transitions. Word has length 14 [2020-12-22 10:30:32,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:32,176 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 508 transitions. [2020-12-22 10:30:32,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:30:32,177 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 508 transitions. [2020-12-22 10:30:32,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:32,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:32,177 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:32,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:32,378 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:32,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:32,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1859144375, now seen corresponding path program 82 times [2020-12-22 10:30:32,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:32,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195190897] [2020-12-22 10:30:32,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:32,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:32,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:32,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195190897] [2020-12-22 10:30:32,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570707242] [2020-12-22 10:30:32,500 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:32,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:30:32,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:32,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:32,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:32,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:32,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:32,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327943303] [2020-12-22 10:30:32,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:32,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:32,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:32,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:32,807 INFO L87 Difference]: Start difference. First operand 188 states and 508 transitions. Second operand 17 states. [2020-12-22 10:30:33,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:33,720 INFO L93 Difference]: Finished difference Result 281 states and 690 transitions. [2020-12-22 10:30:33,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:30:33,721 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:33,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:33,722 INFO L225 Difference]: With dead ends: 281 [2020-12-22 10:30:33,722 INFO L226 Difference]: Without dead ends: 279 [2020-12-22 10:30:33,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=346, Invalid=844, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 10:30:33,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-12-22 10:30:33,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 189. [2020-12-22 10:30:33,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-22 10:30:33,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 510 transitions. [2020-12-22 10:30:33,726 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 510 transitions. Word has length 14 [2020-12-22 10:30:33,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:33,726 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 510 transitions. [2020-12-22 10:30:33,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:33,726 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 510 transitions. [2020-12-22 10:30:33,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:33,727 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:33,727 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:33,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-12-22 10:30:33,928 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:33,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:33,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1859746922, now seen corresponding path program 83 times [2020-12-22 10:30:33,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:33,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793067592] [2020-12-22 10:30:33,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:34,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793067592] [2020-12-22 10:30:34,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407863176] [2020-12-22 10:30:34,062 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:34,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:30:34,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:34,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:34,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:34,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:34,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:34,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509685133] [2020-12-22 10:30:34,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:34,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:34,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:34,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:34,353 INFO L87 Difference]: Start difference. First operand 189 states and 510 transitions. Second operand 17 states. [2020-12-22 10:30:35,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:35,263 INFO L93 Difference]: Finished difference Result 275 states and 685 transitions. [2020-12-22 10:30:35,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 10:30:35,264 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:35,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:35,265 INFO L225 Difference]: With dead ends: 275 [2020-12-22 10:30:35,265 INFO L226 Difference]: Without dead ends: 273 [2020-12-22 10:30:35,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=393, Invalid=867, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 10:30:35,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-12-22 10:30:35,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 191. [2020-12-22 10:30:35,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-22 10:30:35,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 517 transitions. [2020-12-22 10:30:35,279 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 517 transitions. Word has length 14 [2020-12-22 10:30:35,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:35,279 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 517 transitions. [2020-12-22 10:30:35,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:35,279 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 517 transitions. [2020-12-22 10:30:35,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:35,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:35,280 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:35,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:35,494 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:35,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:35,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1859766359, now seen corresponding path program 84 times [2020-12-22 10:30:35,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:35,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674741632] [2020-12-22 10:30:35,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:35,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674741632] [2020-12-22 10:30:35,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086168213] [2020-12-22 10:30:35,685 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:35,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:30:35,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:35,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:30:35,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:35,945 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:35,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:35,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:30:35,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822813384] [2020-12-22 10:30:35,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:30:35,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:35,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:30:35,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:30:35,977 INFO L87 Difference]: Start difference. First operand 191 states and 517 transitions. Second operand 18 states. [2020-12-22 10:30:37,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:37,175 INFO L93 Difference]: Finished difference Result 316 states and 777 transitions. [2020-12-22 10:30:37,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 10:30:37,176 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:30:37,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:37,178 INFO L225 Difference]: With dead ends: 316 [2020-12-22 10:30:37,178 INFO L226 Difference]: Without dead ends: 304 [2020-12-22 10:30:37,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=576, Invalid=1316, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 10:30:37,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-12-22 10:30:37,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 190. [2020-12-22 10:30:37,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-12-22 10:30:37,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 513 transitions. [2020-12-22 10:30:37,182 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 513 transitions. Word has length 14 [2020-12-22 10:30:37,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:37,183 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 513 transitions. [2020-12-22 10:30:37,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:30:37,183 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 513 transitions. [2020-12-22 10:30:37,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:37,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:37,183 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:37,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:37,384 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:37,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:37,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1859836295, now seen corresponding path program 85 times [2020-12-22 10:30:37,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:37,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657981425] [2020-12-22 10:30:37,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:37,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:37,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657981425] [2020-12-22 10:30:37,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222932548] [2020-12-22 10:30:37,525 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:37,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:37,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:37,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:37,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:37,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:37,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876903962] [2020-12-22 10:30:37,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:37,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:37,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:37,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:37,843 INFO L87 Difference]: Start difference. First operand 190 states and 513 transitions. Second operand 17 states. [2020-12-22 10:30:38,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:38,892 INFO L93 Difference]: Finished difference Result 282 states and 699 transitions. [2020-12-22 10:30:38,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 10:30:38,893 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:38,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:38,895 INFO L225 Difference]: With dead ends: 282 [2020-12-22 10:30:38,895 INFO L226 Difference]: Without dead ends: 280 [2020-12-22 10:30:38,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=391, Invalid=941, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 10:30:38,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-12-22 10:30:38,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 192. [2020-12-22 10:30:38,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-12-22 10:30:38,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 520 transitions. [2020-12-22 10:30:38,900 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 520 transitions. Word has length 14 [2020-12-22 10:30:38,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:38,900 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 520 transitions. [2020-12-22 10:30:38,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:38,900 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 520 transitions. [2020-12-22 10:30:38,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:38,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:38,901 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:39,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2020-12-22 10:30:39,102 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:39,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:39,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1859855732, now seen corresponding path program 86 times [2020-12-22 10:30:39,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:39,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675379170] [2020-12-22 10:30:39,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:39,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675379170] [2020-12-22 10:30:39,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686554604] [2020-12-22 10:30:39,252 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:39,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:30:39,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:39,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:39,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:39,543 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:39,545 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:30:39,547 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:39,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:39,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:30:39,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733451901] [2020-12-22 10:30:39,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:30:39,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:39,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:30:39,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:30:39,587 INFO L87 Difference]: Start difference. First operand 192 states and 520 transitions. Second operand 18 states. [2020-12-22 10:30:40,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:40,906 INFO L93 Difference]: Finished difference Result 324 states and 795 transitions. [2020-12-22 10:30:40,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 10:30:40,908 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:30:40,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:40,909 INFO L225 Difference]: With dead ends: 324 [2020-12-22 10:30:40,909 INFO L226 Difference]: Without dead ends: 312 [2020-12-22 10:30:40,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=535, Invalid=1271, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 10:30:40,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-12-22 10:30:40,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 189. [2020-12-22 10:30:40,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-22 10:30:40,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 509 transitions. [2020-12-22 10:30:40,914 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 509 transitions. Word has length 14 [2020-12-22 10:30:40,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:40,914 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 509 transitions. [2020-12-22 10:30:40,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:30:40,914 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 509 transitions. [2020-12-22 10:30:40,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:40,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:40,915 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:41,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-12-22 10:30:41,118 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:41,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:41,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1926352871, now seen corresponding path program 87 times [2020-12-22 10:30:41,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:41,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747908760] [2020-12-22 10:30:41,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:41,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:41,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747908760] [2020-12-22 10:30:41,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381742854] [2020-12-22 10:30:41,270 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:41,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:30:41,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:41,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:30:41,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:41,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:41,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:41,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:41,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263370070] [2020-12-22 10:30:41,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:41,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:41,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:41,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:41,617 INFO L87 Difference]: Start difference. First operand 189 states and 509 transitions. Second operand 17 states. [2020-12-22 10:30:42,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:42,162 INFO L93 Difference]: Finished difference Result 269 states and 668 transitions. [2020-12-22 10:30:42,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:30:42,163 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:42,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:42,164 INFO L225 Difference]: With dead ends: 269 [2020-12-22 10:30:42,164 INFO L226 Difference]: Without dead ends: 267 [2020-12-22 10:30:42,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:30:42,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-12-22 10:30:42,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 189. [2020-12-22 10:30:42,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-22 10:30:42,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 508 transitions. [2020-12-22 10:30:42,170 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 508 transitions. Word has length 14 [2020-12-22 10:30:42,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:42,170 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 508 transitions. [2020-12-22 10:30:42,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:42,171 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 508 transitions. [2020-12-22 10:30:42,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:42,171 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:42,172 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:42,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:42,384 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:42,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:42,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1947799508, now seen corresponding path program 88 times [2020-12-22 10:30:42,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:42,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056502982] [2020-12-22 10:30:42,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:42,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056502982] [2020-12-22 10:30:42,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291657626] [2020-12-22 10:30:42,522 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:42,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:30:42,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:42,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:42,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:42,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:42,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:42,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321142296] [2020-12-22 10:30:42,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:42,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:42,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:42,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:42,813 INFO L87 Difference]: Start difference. First operand 189 states and 508 transitions. Second operand 17 states. [2020-12-22 10:30:43,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:43,540 INFO L93 Difference]: Finished difference Result 275 states and 682 transitions. [2020-12-22 10:30:43,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:30:43,541 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:43,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:43,542 INFO L225 Difference]: With dead ends: 275 [2020-12-22 10:30:43,542 INFO L226 Difference]: Without dead ends: 273 [2020-12-22 10:30:43,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-12-22 10:30:43,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-12-22 10:30:43,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 191. [2020-12-22 10:30:43,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-22 10:30:43,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 515 transitions. [2020-12-22 10:30:43,547 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 515 transitions. Word has length 14 [2020-12-22 10:30:43,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:43,547 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 515 transitions. [2020-12-22 10:30:43,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:43,547 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 515 transitions. [2020-12-22 10:30:43,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:43,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:43,547 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:43,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-12-22 10:30:43,748 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:43,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:43,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1948404938, now seen corresponding path program 89 times [2020-12-22 10:30:43,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:43,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576273800] [2020-12-22 10:30:43,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:43,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576273800] [2020-12-22 10:30:43,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876595421] [2020-12-22 10:30:43,902 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:43,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:30:43,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:43,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:43,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:44,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:44,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:44,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:44,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902360033] [2020-12-22 10:30:44,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:44,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:44,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:44,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:44,221 INFO L87 Difference]: Start difference. First operand 191 states and 515 transitions. Second operand 17 states. [2020-12-22 10:30:45,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:45,103 INFO L93 Difference]: Finished difference Result 271 states and 679 transitions. [2020-12-22 10:30:45,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:30:45,107 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:45,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:45,108 INFO L225 Difference]: With dead ends: 271 [2020-12-22 10:30:45,108 INFO L226 Difference]: Without dead ends: 269 [2020-12-22 10:30:45,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=307, Invalid=749, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 10:30:45,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-12-22 10:30:45,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 193. [2020-12-22 10:30:45,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-12-22 10:30:45,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 522 transitions. [2020-12-22 10:30:45,116 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 522 transitions. Word has length 14 [2020-12-22 10:30:45,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:45,116 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 522 transitions. [2020-12-22 10:30:45,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:45,116 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 522 transitions. [2020-12-22 10:30:45,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:45,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:45,117 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:45,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-12-22 10:30:45,331 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:45,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:45,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1948424375, now seen corresponding path program 90 times [2020-12-22 10:30:45,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:45,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3233895] [2020-12-22 10:30:45,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:45,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3233895] [2020-12-22 10:30:45,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019236814] [2020-12-22 10:30:45,465 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:45,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:30:45,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:45,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:30:45,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:45,746 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:45,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:45,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:45,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368154935] [2020-12-22 10:30:45,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:45,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:45,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:45,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:45,767 INFO L87 Difference]: Start difference. First operand 193 states and 522 transitions. Second operand 17 states. [2020-12-22 10:30:46,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:46,932 INFO L93 Difference]: Finished difference Result 290 states and 727 transitions. [2020-12-22 10:30:46,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 10:30:46,934 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:46,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:46,935 INFO L225 Difference]: With dead ends: 290 [2020-12-22 10:30:46,935 INFO L226 Difference]: Without dead ends: 282 [2020-12-22 10:30:46,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=476, Invalid=1084, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 10:30:46,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-12-22 10:30:46,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 194. [2020-12-22 10:30:46,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-22 10:30:46,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 527 transitions. [2020-12-22 10:30:46,940 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 527 transitions. Word has length 14 [2020-12-22 10:30:46,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:46,940 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 527 transitions. [2020-12-22 10:30:46,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:46,940 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 527 transitions. [2020-12-22 10:30:46,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:46,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:46,940 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:47,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-12-22 10:30:47,141 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:47,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:47,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1948427258, now seen corresponding path program 91 times [2020-12-22 10:30:47,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:47,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157817653] [2020-12-22 10:30:47,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:47,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:47,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157817653] [2020-12-22 10:30:47,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854972378] [2020-12-22 10:30:47,302 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:47,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:47,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:47,566 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:30:47,568 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 10:30:47,569 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:47,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:47,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:30:47,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337173489] [2020-12-22 10:30:47,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:30:47,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:47,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:30:47,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:30:47,617 INFO L87 Difference]: Start difference. First operand 194 states and 527 transitions. Second operand 18 states. [2020-12-22 10:30:49,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:49,044 INFO L93 Difference]: Finished difference Result 339 states and 838 transitions. [2020-12-22 10:30:49,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 10:30:49,046 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:30:49,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:49,047 INFO L225 Difference]: With dead ends: 339 [2020-12-22 10:30:49,047 INFO L226 Difference]: Without dead ends: 327 [2020-12-22 10:30:49,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 10:30:49,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-12-22 10:30:49,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 184. [2020-12-22 10:30:49,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-22 10:30:49,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 494 transitions. [2020-12-22 10:30:49,052 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 494 transitions. Word has length 14 [2020-12-22 10:30:49,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:49,052 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 494 transitions. [2020-12-22 10:30:49,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:30:49,052 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 494 transitions. [2020-12-22 10:30:49,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:49,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:49,053 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:49,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:49,254 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:49,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:49,254 INFO L82 PathProgramCache]: Analyzing trace with hash 366426419, now seen corresponding path program 92 times [2020-12-22 10:30:49,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:49,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935459142] [2020-12-22 10:30:49,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:49,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:49,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935459142] [2020-12-22 10:30:49,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429500205] [2020-12-22 10:30:49,375 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:49,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:30:49,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:49,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:49,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:49,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:49,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:49,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:49,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934600471] [2020-12-22 10:30:49,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:49,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:49,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:49,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:49,676 INFO L87 Difference]: Start difference. First operand 184 states and 494 transitions. Second operand 17 states. [2020-12-22 10:30:50,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:50,077 INFO L93 Difference]: Finished difference Result 254 states and 640 transitions. [2020-12-22 10:30:50,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 10:30:50,078 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:50,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:50,080 INFO L225 Difference]: With dead ends: 254 [2020-12-22 10:30:50,080 INFO L226 Difference]: Without dead ends: 252 [2020-12-22 10:30:50,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:30:50,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-12-22 10:30:50,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 188. [2020-12-22 10:30:50,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-22 10:30:50,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 505 transitions. [2020-12-22 10:30:50,084 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 505 transitions. Word has length 14 [2020-12-22 10:30:50,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:50,085 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 505 transitions. [2020-12-22 10:30:50,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:50,085 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 505 transitions. [2020-12-22 10:30:50,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:50,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:50,085 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:50,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-12-22 10:30:50,286 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:50,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:50,287 INFO L82 PathProgramCache]: Analyzing trace with hash 369196982, now seen corresponding path program 93 times [2020-12-22 10:30:50,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:50,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672106337] [2020-12-22 10:30:50,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:50,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672106337] [2020-12-22 10:30:50,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040609335] [2020-12-22 10:30:50,453 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:50,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:30:50,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:50,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:50,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:50,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:50,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:50,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:50,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310322726] [2020-12-22 10:30:50,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:50,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:50,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:50,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:50,809 INFO L87 Difference]: Start difference. First operand 188 states and 505 transitions. Second operand 17 states. [2020-12-22 10:30:51,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:51,299 INFO L93 Difference]: Finished difference Result 263 states and 656 transitions. [2020-12-22 10:30:51,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:30:51,300 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:51,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:51,302 INFO L225 Difference]: With dead ends: 263 [2020-12-22 10:30:51,302 INFO L226 Difference]: Without dead ends: 261 [2020-12-22 10:30:51,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-12-22 10:30:51,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-12-22 10:30:51,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 192. [2020-12-22 10:30:51,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-12-22 10:30:51,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 516 transitions. [2020-12-22 10:30:51,307 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 516 transitions. Word has length 14 [2020-12-22 10:30:51,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:51,307 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 516 transitions. [2020-12-22 10:30:51,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:51,307 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 516 transitions. [2020-12-22 10:30:51,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:51,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:51,308 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:51,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-12-22 10:30:51,519 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:51,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:51,519 INFO L82 PathProgramCache]: Analyzing trace with hash 369283472, now seen corresponding path program 94 times [2020-12-22 10:30:51,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:51,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476577258] [2020-12-22 10:30:51,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:51,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476577258] [2020-12-22 10:30:51,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81407061] [2020-12-22 10:30:51,638 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:51,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:30:51,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:51,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:51,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:51,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:51,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:51,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:51,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425776051] [2020-12-22 10:30:51,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:51,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:51,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:51,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:51,950 INFO L87 Difference]: Start difference. First operand 192 states and 516 transitions. Second operand 17 states. [2020-12-22 10:30:52,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:52,529 INFO L93 Difference]: Finished difference Result 262 states and 659 transitions. [2020-12-22 10:30:52,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:30:52,530 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:52,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:52,531 INFO L225 Difference]: With dead ends: 262 [2020-12-22 10:30:52,532 INFO L226 Difference]: Without dead ends: 260 [2020-12-22 10:30:52,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:30:52,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-12-22 10:30:52,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 195. [2020-12-22 10:30:52,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-22 10:30:52,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 523 transitions. [2020-12-22 10:30:52,543 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 523 transitions. Word has length 14 [2020-12-22 10:30:52,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:52,543 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 523 transitions. [2020-12-22 10:30:52,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:52,543 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 523 transitions. [2020-12-22 10:30:52,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:52,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:52,544 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:52,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:52,745 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:52,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:52,746 INFO L82 PathProgramCache]: Analyzing trace with hash 452310989, now seen corresponding path program 95 times [2020-12-22 10:30:52,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:52,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945126788] [2020-12-22 10:30:52,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:52,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:52,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945126788] [2020-12-22 10:30:52,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201672461] [2020-12-22 10:30:52,897 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:52,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:30:52,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:52,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:52,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:53,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:53,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:53,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407202880] [2020-12-22 10:30:53,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:53,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:53,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:53,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:53,204 INFO L87 Difference]: Start difference. First operand 195 states and 523 transitions. Second operand 17 states. [2020-12-22 10:30:53,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:53,620 INFO L93 Difference]: Finished difference Result 252 states and 636 transitions. [2020-12-22 10:30:53,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:30:53,621 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:53,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:53,622 INFO L225 Difference]: With dead ends: 252 [2020-12-22 10:30:53,623 INFO L226 Difference]: Without dead ends: 250 [2020-12-22 10:30:53,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:30:53,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-12-22 10:30:53,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 195. [2020-12-22 10:30:53,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-22 10:30:53,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 523 transitions. [2020-12-22 10:30:53,628 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 523 transitions. Word has length 14 [2020-12-22 10:30:53,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:53,628 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 523 transitions. [2020-12-22 10:30:53,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:53,628 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 523 transitions. [2020-12-22 10:30:53,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:53,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:53,629 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:53,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:53,834 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:53,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:53,835 INFO L82 PathProgramCache]: Analyzing trace with hash 452400362, now seen corresponding path program 96 times [2020-12-22 10:30:53,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:53,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113083660] [2020-12-22 10:30:53,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:53,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:53,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113083660] [2020-12-22 10:30:53,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553105528] [2020-12-22 10:30:53,949 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:54,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:30:54,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:54,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:54,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:54,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:54,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:54,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546276711] [2020-12-22 10:30:54,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:54,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:54,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:54,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:54,339 INFO L87 Difference]: Start difference. First operand 195 states and 523 transitions. Second operand 17 states. [2020-12-22 10:30:54,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:54,816 INFO L93 Difference]: Finished difference Result 255 states and 640 transitions. [2020-12-22 10:30:54,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 10:30:54,817 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:54,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:54,818 INFO L225 Difference]: With dead ends: 255 [2020-12-22 10:30:54,819 INFO L226 Difference]: Without dead ends: 253 [2020-12-22 10:30:54,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:30:54,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-12-22 10:30:54,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 194. [2020-12-22 10:30:54,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-22 10:30:54,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 520 transitions. [2020-12-22 10:30:54,824 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 520 transitions. Word has length 14 [2020-12-22 10:30:54,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:54,825 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 520 transitions. [2020-12-22 10:30:54,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:54,825 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 520 transitions. [2020-12-22 10:30:54,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:54,825 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:54,825 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:55,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:55,027 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:55,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:55,027 INFO L82 PathProgramCache]: Analyzing trace with hash -234554981, now seen corresponding path program 97 times [2020-12-22 10:30:55,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:55,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315970418] [2020-12-22 10:30:55,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:55,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:55,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315970418] [2020-12-22 10:30:55,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353095564] [2020-12-22 10:30:55,176 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:55,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:55,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:55,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:55,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:55,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:55,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051792801] [2020-12-22 10:30:55,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:55,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:55,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:55,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:55,522 INFO L87 Difference]: Start difference. First operand 194 states and 520 transitions. Second operand 17 states. [2020-12-22 10:30:56,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:56,076 INFO L93 Difference]: Finished difference Result 273 states and 680 transitions. [2020-12-22 10:30:56,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:30:56,078 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:56,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:56,079 INFO L225 Difference]: With dead ends: 273 [2020-12-22 10:30:56,079 INFO L226 Difference]: Without dead ends: 271 [2020-12-22 10:30:56,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:30:56,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-12-22 10:30:56,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 195. [2020-12-22 10:30:56,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-22 10:30:56,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 523 transitions. [2020-12-22 10:30:56,086 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 523 transitions. Word has length 14 [2020-12-22 10:30:56,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:56,086 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 523 transitions. [2020-12-22 10:30:56,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:56,086 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 523 transitions. [2020-12-22 10:30:56,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:56,087 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:56,087 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:56,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:56,288 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:56,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:56,289 INFO L82 PathProgramCache]: Analyzing trace with hash -231784418, now seen corresponding path program 98 times [2020-12-22 10:30:56,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:56,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405459088] [2020-12-22 10:30:56,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:56,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:56,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405459088] [2020-12-22 10:30:56,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350745767] [2020-12-22 10:30:56,434 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:56,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:30:56,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:56,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:56,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:56,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:56,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:56,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674355305] [2020-12-22 10:30:56,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:56,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:56,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:56,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:56,704 INFO L87 Difference]: Start difference. First operand 195 states and 523 transitions. Second operand 17 states. [2020-12-22 10:30:57,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:57,244 INFO L93 Difference]: Finished difference Result 279 states and 689 transitions. [2020-12-22 10:30:57,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:30:57,245 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:57,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:57,247 INFO L225 Difference]: With dead ends: 279 [2020-12-22 10:30:57,247 INFO L226 Difference]: Without dead ends: 277 [2020-12-22 10:30:57,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:30:57,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-12-22 10:30:57,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 199. [2020-12-22 10:30:57,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-22 10:30:57,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 534 transitions. [2020-12-22 10:30:57,254 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 534 transitions. Word has length 14 [2020-12-22 10:30:57,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:57,254 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 534 transitions. [2020-12-22 10:30:57,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:57,254 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 534 transitions. [2020-12-22 10:30:57,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:57,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:57,255 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:57,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-12-22 10:30:57,470 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:57,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:57,470 INFO L82 PathProgramCache]: Analyzing trace with hash -231697928, now seen corresponding path program 99 times [2020-12-22 10:30:57,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:57,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989355610] [2020-12-22 10:30:57,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:57,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:57,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989355610] [2020-12-22 10:30:57,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816365665] [2020-12-22 10:30:57,623 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:57,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 10:30:57,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:57,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:30:57,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:57,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:57,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:57,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737912949] [2020-12-22 10:30:57,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:57,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:57,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:57,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:57,967 INFO L87 Difference]: Start difference. First operand 199 states and 534 transitions. Second operand 17 states. [2020-12-22 10:30:58,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:58,638 INFO L93 Difference]: Finished difference Result 277 states and 693 transitions. [2020-12-22 10:30:58,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:30:58,639 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:58,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:58,640 INFO L225 Difference]: With dead ends: 277 [2020-12-22 10:30:58,640 INFO L226 Difference]: Without dead ends: 275 [2020-12-22 10:30:58,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:30:58,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-12-22 10:30:58,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 199. [2020-12-22 10:30:58,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-22 10:30:58,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 533 transitions. [2020-12-22 10:30:58,644 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 533 transitions. Word has length 14 [2020-12-22 10:30:58,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:58,645 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 533 transitions. [2020-12-22 10:30:58,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:58,645 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 533 transitions. [2020-12-22 10:30:58,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:58,645 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:58,645 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:58,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-12-22 10:30:58,847 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:58,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:58,848 INFO L82 PathProgramCache]: Analyzing trace with hash -148670411, now seen corresponding path program 100 times [2020-12-22 10:30:58,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:58,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505298633] [2020-12-22 10:30:58,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:59,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505298633] [2020-12-22 10:30:59,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896137527] [2020-12-22 10:30:59,001 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:59,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:30:59,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:59,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:59,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:59,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:59,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:59,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652540676] [2020-12-22 10:30:59,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:59,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:59,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:59,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:59,314 INFO L87 Difference]: Start difference. First operand 199 states and 533 transitions. Second operand 17 states. [2020-12-22 10:30:59,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:59,837 INFO L93 Difference]: Finished difference Result 272 states and 678 transitions. [2020-12-22 10:30:59,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:30:59,838 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:59,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:59,839 INFO L225 Difference]: With dead ends: 272 [2020-12-22 10:30:59,839 INFO L226 Difference]: Without dead ends: 270 [2020-12-22 10:30:59,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-12-22 10:30:59,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-12-22 10:30:59,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 197. [2020-12-22 10:30:59,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-12-22 10:30:59,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 528 transitions. [2020-12-22 10:30:59,846 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 528 transitions. Word has length 14 [2020-12-22 10:30:59,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:59,846 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 528 transitions. [2020-12-22 10:30:59,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:59,846 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 528 transitions. [2020-12-22 10:30:59,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:59,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:59,847 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:00,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-12-22 10:31:00,050 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:00,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:00,051 INFO L82 PathProgramCache]: Analyzing trace with hash -148581038, now seen corresponding path program 101 times [2020-12-22 10:31:00,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:00,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770059729] [2020-12-22 10:31:00,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:00,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:00,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770059729] [2020-12-22 10:31:00,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523539973] [2020-12-22 10:31:00,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:00,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:31:00,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:00,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:31:00,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:00,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:00,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:31:00,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487183514] [2020-12-22 10:31:00,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:31:00,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:00,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:31:00,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:31:00,587 INFO L87 Difference]: Start difference. First operand 197 states and 528 transitions. Second operand 17 states. [2020-12-22 10:31:01,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:01,158 INFO L93 Difference]: Finished difference Result 266 states and 663 transitions. [2020-12-22 10:31:01,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:31:01,160 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:31:01,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:01,161 INFO L225 Difference]: With dead ends: 266 [2020-12-22 10:31:01,161 INFO L226 Difference]: Without dead ends: 264 [2020-12-22 10:31:01,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:31:01,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-12-22 10:31:01,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 192. [2020-12-22 10:31:01,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-12-22 10:31:01,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 515 transitions. [2020-12-22 10:31:01,165 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 515 transitions. Word has length 14 [2020-12-22 10:31:01,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:01,166 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 515 transitions. [2020-12-22 10:31:01,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:31:01,166 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 515 transitions. [2020-12-22 10:31:01,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:31:01,166 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:01,167 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:01,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:01,369 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:01,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:01,370 INFO L82 PathProgramCache]: Analyzing trace with hash 621940965, now seen corresponding path program 102 times [2020-12-22 10:31:01,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:01,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956395114] [2020-12-22 10:31:01,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:01,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:01,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:01,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956395114] [2020-12-22 10:31:01,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033998673] [2020-12-22 10:31:01,527 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:01,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:31:01,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:01,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:31:01,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:01,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:01,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:31:01,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318519239] [2020-12-22 10:31:01,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:31:01,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:01,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:31:01,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:31:01,897 INFO L87 Difference]: Start difference. First operand 192 states and 515 transitions. Second operand 17 states. [2020-12-22 10:31:02,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:02,421 INFO L93 Difference]: Finished difference Result 269 states and 666 transitions. [2020-12-22 10:31:02,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:31:02,423 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:31:02,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:02,424 INFO L225 Difference]: With dead ends: 269 [2020-12-22 10:31:02,425 INFO L226 Difference]: Without dead ends: 267 [2020-12-22 10:31:02,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:31:02,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-12-22 10:31:02,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 192. [2020-12-22 10:31:02,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-12-22 10:31:02,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 515 transitions. [2020-12-22 10:31:02,430 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 515 transitions. Word has length 14 [2020-12-22 10:31:02,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:02,431 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 515 transitions. [2020-12-22 10:31:02,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:31:02,431 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 515 transitions. [2020-12-22 10:31:02,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:31:02,431 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:02,432 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:02,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-12-22 10:31:02,634 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:02,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:02,635 INFO L82 PathProgramCache]: Analyzing trace with hash 624711528, now seen corresponding path program 103 times [2020-12-22 10:31:02,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:02,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311304629] [2020-12-22 10:31:02,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:02,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311304629] [2020-12-22 10:31:02,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371051524] [2020-12-22 10:31:02,790 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:02,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:31:02,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:03,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:03,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:03,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:31:03,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338278159] [2020-12-22 10:31:03,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:31:03,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:03,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:31:03,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:31:03,122 INFO L87 Difference]: Start difference. First operand 192 states and 515 transitions. Second operand 17 states. [2020-12-22 10:31:03,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:03,749 INFO L93 Difference]: Finished difference Result 276 states and 675 transitions. [2020-12-22 10:31:03,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:31:03,750 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:31:03,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:03,751 INFO L225 Difference]: With dead ends: 276 [2020-12-22 10:31:03,751 INFO L226 Difference]: Without dead ends: 274 [2020-12-22 10:31:03,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:31:03,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-12-22 10:31:03,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 194. [2020-12-22 10:31:03,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-22 10:31:03,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 520 transitions. [2020-12-22 10:31:03,758 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 520 transitions. Word has length 14 [2020-12-22 10:31:03,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:03,758 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 520 transitions. [2020-12-22 10:31:03,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:31:03,758 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 520 transitions. [2020-12-22 10:31:03,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:31:03,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:03,759 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:03,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:03,975 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:03,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:03,976 INFO L82 PathProgramCache]: Analyzing trace with hash 624798018, now seen corresponding path program 104 times [2020-12-22 10:31:03,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:03,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013612290] [2020-12-22 10:31:03,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:04,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013612290] [2020-12-22 10:31:04,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968906772] [2020-12-22 10:31:04,137 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:04,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:31:04,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:04,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:31:04,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:04,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:04,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:31:04,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824012753] [2020-12-22 10:31:04,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:31:04,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:04,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:31:04,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:31:04,522 INFO L87 Difference]: Start difference. First operand 194 states and 520 transitions. Second operand 17 states. [2020-12-22 10:31:05,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:05,218 INFO L93 Difference]: Finished difference Result 278 states and 684 transitions. [2020-12-22 10:31:05,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:31:05,220 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:31:05,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:05,221 INFO L225 Difference]: With dead ends: 278 [2020-12-22 10:31:05,221 INFO L226 Difference]: Without dead ends: 276 [2020-12-22 10:31:05,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=211, Invalid=545, Unknown=0, NotChecked=0, Total=756 [2020-12-22 10:31:05,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-12-22 10:31:05,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 194. [2020-12-22 10:31:05,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-22 10:31:05,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 519 transitions. [2020-12-22 10:31:05,225 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 519 transitions. Word has length 14 [2020-12-22 10:31:05,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:05,226 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 519 transitions. [2020-12-22 10:31:05,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:31:05,226 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 519 transitions. [2020-12-22 10:31:05,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:31:05,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:05,226 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:05,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-12-22 10:31:05,427 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:05,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:05,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1203759195, now seen corresponding path program 105 times [2020-12-22 10:31:05,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:05,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373424387] [2020-12-22 10:31:05,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:05,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:05,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373424387] [2020-12-22 10:31:05,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415147122] [2020-12-22 10:31:05,582 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:05,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:31:05,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:05,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:31:05,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:05,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:05,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:05,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:31:05,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295793011] [2020-12-22 10:31:05,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:31:05,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:05,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:31:05,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:31:05,916 INFO L87 Difference]: Start difference. First operand 194 states and 519 transitions. Second operand 17 states. [2020-12-22 10:31:06,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:06,506 INFO L93 Difference]: Finished difference Result 277 states and 678 transitions. [2020-12-22 10:31:06,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 10:31:06,508 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:31:06,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:06,509 INFO L225 Difference]: With dead ends: 277 [2020-12-22 10:31:06,509 INFO L226 Difference]: Without dead ends: 275 [2020-12-22 10:31:06,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2020-12-22 10:31:06,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-12-22 10:31:06,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 193. [2020-12-22 10:31:06,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-12-22 10:31:06,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 516 transitions. [2020-12-22 10:31:06,514 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 516 transitions. Word has length 14 [2020-12-22 10:31:06,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:06,514 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 516 transitions. [2020-12-22 10:31:06,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:31:06,514 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 516 transitions. [2020-12-22 10:31:06,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:31:06,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:06,514 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:06,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:06,715 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:06,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:06,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1222527525, now seen corresponding path program 106 times [2020-12-22 10:31:06,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:06,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185311953] [2020-12-22 10:31:06,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:06,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185311953] [2020-12-22 10:31:06,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044204012] [2020-12-22 10:31:06,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:06,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:31:06,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:06,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:31:06,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:07,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:07,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:31:07,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832048139] [2020-12-22 10:31:07,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:31:07,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:07,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:31:07,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:31:07,230 INFO L87 Difference]: Start difference. First operand 193 states and 516 transitions. Second operand 17 states. [2020-12-22 10:31:08,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:08,014 INFO L93 Difference]: Finished difference Result 280 states and 684 transitions. [2020-12-22 10:31:08,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:31:08,016 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:31:08,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:08,017 INFO L225 Difference]: With dead ends: 280 [2020-12-22 10:31:08,017 INFO L226 Difference]: Without dead ends: 278 [2020-12-22 10:31:08,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=264, Invalid=666, Unknown=0, NotChecked=0, Total=930 [2020-12-22 10:31:08,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-12-22 10:31:08,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 195. [2020-12-22 10:31:08,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-22 10:31:08,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 523 transitions. [2020-12-22 10:31:08,024 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 523 transitions. Word has length 14 [2020-12-22 10:31:08,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:08,025 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 523 transitions. [2020-12-22 10:31:08,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:31:08,025 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 523 transitions. [2020-12-22 10:31:08,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:31:08,025 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:08,026 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:08,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2020-12-22 10:31:08,241 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:08,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:08,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1223219445, now seen corresponding path program 107 times [2020-12-22 10:31:08,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:08,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414317934] [2020-12-22 10:31:08,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:08,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414317934] [2020-12-22 10:31:08,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324697620] [2020-12-22 10:31:08,360 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:08,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:31:08,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:08,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:31:08,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:08,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:08,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:08,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:31:08,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623461374] [2020-12-22 10:31:08,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:31:08,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:08,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:31:08,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:31:08,719 INFO L87 Difference]: Start difference. First operand 195 states and 523 transitions. Second operand 17 states. [2020-12-22 10:31:09,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:09,690 INFO L93 Difference]: Finished difference Result 292 states and 718 transitions. [2020-12-22 10:31:09,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:31:09,691 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:31:09,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:09,693 INFO L225 Difference]: With dead ends: 292 [2020-12-22 10:31:09,693 INFO L226 Difference]: Without dead ends: 290 [2020-12-22 10:31:09,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=307, Invalid=749, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 10:31:09,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-12-22 10:31:09,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 197. [2020-12-22 10:31:09,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-12-22 10:31:09,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 530 transitions. [2020-12-22 10:31:09,697 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 530 transitions. Word has length 14 [2020-12-22 10:31:09,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:09,698 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 530 transitions. [2020-12-22 10:31:09,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:31:09,698 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 530 transitions. [2020-12-22 10:31:09,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:31:09,698 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:09,698 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:09,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:09,899 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:09,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:09,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1223238882, now seen corresponding path program 108 times [2020-12-22 10:31:09,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:09,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880033405] [2020-12-22 10:31:09,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:09,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:10,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880033405] [2020-12-22 10:31:10,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697963102] [2020-12-22 10:31:10,092 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:10,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:31:10,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:10,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:31:10,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:10,435 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:31:10,437 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:31:10,438 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:31:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:10,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:10,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:31:10,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009365655] [2020-12-22 10:31:10,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:31:10,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:10,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:31:10,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:31:10,485 INFO L87 Difference]: Start difference. First operand 197 states and 530 transitions. Second operand 18 states. [2020-12-22 10:31:12,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:12,043 INFO L93 Difference]: Finished difference Result 359 states and 879 transitions. [2020-12-22 10:31:12,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 10:31:12,044 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:31:12,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:12,047 INFO L225 Difference]: With dead ends: 359 [2020-12-22 10:31:12,047 INFO L226 Difference]: Without dead ends: 347 [2020-12-22 10:31:12,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 10:31:12,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-12-22 10:31:12,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 196. [2020-12-22 10:31:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-12-22 10:31:12,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 527 transitions. [2020-12-22 10:31:12,055 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 527 transitions. Word has length 14 [2020-12-22 10:31:12,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:12,056 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 527 transitions. [2020-12-22 10:31:12,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:31:12,056 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 527 transitions. [2020-12-22 10:31:12,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:31:12,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:12,056 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:12,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-12-22 10:31:12,271 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:12,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:12,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1289646648, now seen corresponding path program 109 times [2020-12-22 10:31:12,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:12,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647325554] [2020-12-22 10:31:12,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:12,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:12,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647325554] [2020-12-22 10:31:12,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207651477] [2020-12-22 10:31:12,456 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:12,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:31:12,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:12,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:12,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:31:12,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229124145] [2020-12-22 10:31:12,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:31:12,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:12,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:31:12,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:31:12,794 INFO L87 Difference]: Start difference. First operand 196 states and 527 transitions. Second operand 17 states. [2020-12-22 10:31:13,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:13,641 INFO L93 Difference]: Finished difference Result 301 states and 732 transitions. [2020-12-22 10:31:13,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:31:13,643 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:31:13,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:13,644 INFO L225 Difference]: With dead ends: 301 [2020-12-22 10:31:13,645 INFO L226 Difference]: Without dead ends: 299 [2020-12-22 10:31:13,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2020-12-22 10:31:13,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-12-22 10:31:13,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 199. [2020-12-22 10:31:13,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-22 10:31:13,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 537 transitions. [2020-12-22 10:31:13,650 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 537 transitions. Word has length 14 [2020-12-22 10:31:13,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:13,650 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 537 transitions. [2020-12-22 10:31:13,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:31:13,650 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 537 transitions. [2020-12-22 10:31:13,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:31:13,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:13,651 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:13,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-12-22 10:31:13,852 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:13,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:13,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1289733138, now seen corresponding path program 110 times [2020-12-22 10:31:13,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:13,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40488281] [2020-12-22 10:31:13,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:14,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:14,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40488281] [2020-12-22 10:31:14,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043750737] [2020-12-22 10:31:14,038 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:14,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:31:14,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:14,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:31:14,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:14,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:14,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:14,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:31:14,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802975826] [2020-12-22 10:31:14,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:31:14,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:14,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:31:14,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:31:14,388 INFO L87 Difference]: Start difference. First operand 199 states and 537 transitions. Second operand 17 states. [2020-12-22 10:31:15,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:15,292 INFO L93 Difference]: Finished difference Result 296 states and 727 transitions. [2020-12-22 10:31:15,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 10:31:15,293 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:31:15,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:15,295 INFO L225 Difference]: With dead ends: 296 [2020-12-22 10:31:15,295 INFO L226 Difference]: Without dead ends: 294 [2020-12-22 10:31:15,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=281, Invalid=711, Unknown=0, NotChecked=0, Total=992 [2020-12-22 10:31:15,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-12-22 10:31:15,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 196. [2020-12-22 10:31:15,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-12-22 10:31:15,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 529 transitions. [2020-12-22 10:31:15,299 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 529 transitions. Word has length 14 [2020-12-22 10:31:15,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:15,299 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 529 transitions. [2020-12-22 10:31:15,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:31:15,299 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 529 transitions. [2020-12-22 10:31:15,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:31:15,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:15,300 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:15,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-12-22 10:31:15,513 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:15,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:15,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1308414978, now seen corresponding path program 111 times [2020-12-22 10:31:15,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:15,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489990842] [2020-12-22 10:31:15,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:15,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:15,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489990842] [2020-12-22 10:31:15,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289587448] [2020-12-22 10:31:15,695 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:15,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:31:15,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:15,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:31:15,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:16,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:16,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:16,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:31:16,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221969130] [2020-12-22 10:31:16,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:31:16,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:16,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:31:16,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:31:16,064 INFO L87 Difference]: Start difference. First operand 196 states and 529 transitions. Second operand 17 states. [2020-12-22 10:31:17,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:17,110 INFO L93 Difference]: Finished difference Result 303 states and 742 transitions. [2020-12-22 10:31:17,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 10:31:17,111 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:31:17,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:17,113 INFO L225 Difference]: With dead ends: 303 [2020-12-22 10:31:17,113 INFO L226 Difference]: Without dead ends: 301 [2020-12-22 10:31:17,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=302, Invalid=754, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 10:31:17,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-12-22 10:31:17,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 199. [2020-12-22 10:31:17,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-22 10:31:17,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 541 transitions. [2020-12-22 10:31:17,118 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 541 transitions. Word has length 14 [2020-12-22 10:31:17,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:17,118 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 541 transitions. [2020-12-22 10:31:17,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:31:17,119 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 541 transitions. [2020-12-22 10:31:17,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:31:17,119 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:17,119 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:17,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:17,333 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:17,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:17,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1309106898, now seen corresponding path program 112 times [2020-12-22 10:31:17,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:17,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149101529] [2020-12-22 10:31:17,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:17,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:17,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149101529] [2020-12-22 10:31:17,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236240319] [2020-12-22 10:31:17,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:17,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:31:17,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:17,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:31:17,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:17,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:17,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:31:17,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792825769] [2020-12-22 10:31:17,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:31:17,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:17,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:31:17,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:31:17,786 INFO L87 Difference]: Start difference. First operand 199 states and 541 transitions. Second operand 17 states. [2020-12-22 10:31:18,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:18,914 INFO L93 Difference]: Finished difference Result 310 states and 764 transitions. [2020-12-22 10:31:18,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 10:31:18,916 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:31:18,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:18,917 INFO L225 Difference]: With dead ends: 310 [2020-12-22 10:31:18,918 INFO L226 Difference]: Without dead ends: 308 [2020-12-22 10:31:18,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=380, Invalid=880, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 10:31:18,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-12-22 10:31:18,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 201. [2020-12-22 10:31:18,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-12-22 10:31:18,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 548 transitions. [2020-12-22 10:31:18,922 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 548 transitions. Word has length 14 [2020-12-22 10:31:18,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:18,922 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 548 transitions. [2020-12-22 10:31:18,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:31:18,922 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 548 transitions. [2020-12-22 10:31:18,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:31:18,923 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:18,923 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:19,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:19,124 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:19,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:19,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1309126335, now seen corresponding path program 113 times [2020-12-22 10:31:19,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:19,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212105512] [2020-12-22 10:31:19,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:19,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:19,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212105512] [2020-12-22 10:31:19,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898314371] [2020-12-22 10:31:19,333 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:19,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:31:19,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:19,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:31:19,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:19,650 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:31:19,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:19,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:19,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:31:19,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588933756] [2020-12-22 10:31:19,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:31:19,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:19,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:31:19,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:31:19,678 INFO L87 Difference]: Start difference. First operand 201 states and 548 transitions. Second operand 18 states. [2020-12-22 10:31:21,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:21,155 INFO L93 Difference]: Finished difference Result 384 states and 939 transitions. [2020-12-22 10:31:21,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 10:31:21,157 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:31:21,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:21,158 INFO L225 Difference]: With dead ends: 384 [2020-12-22 10:31:21,158 INFO L226 Difference]: Without dead ends: 372 [2020-12-22 10:31:21,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=540, Invalid=1352, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 10:31:21,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-12-22 10:31:21,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 199. [2020-12-22 10:31:21,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-22 10:31:21,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 541 transitions. [2020-12-22 10:31:21,164 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 541 transitions. Word has length 14 [2020-12-22 10:31:21,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:21,164 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 541 transitions. [2020-12-22 10:31:21,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:31:21,164 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 541 transitions. [2020-12-22 10:31:21,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:31:21,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:21,165 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:21,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-12-22 10:31:21,366 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:21,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:21,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1010518171, now seen corresponding path program 114 times [2020-12-22 10:31:21,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:21,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153695023] [2020-12-22 10:31:21,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:21,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:21,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153695023] [2020-12-22 10:31:21,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106875106] [2020-12-22 10:31:21,521 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:21,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:31:21,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:21,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:31:21,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:21,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:21,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:21,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:31:21,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694662687] [2020-12-22 10:31:21,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:31:21,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:21,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:31:21,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:31:21,900 INFO L87 Difference]: Start difference. First operand 199 states and 541 transitions. Second operand 17 states. [2020-12-22 10:31:22,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:22,504 INFO L93 Difference]: Finished difference Result 287 states and 722 transitions. [2020-12-22 10:31:22,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:31:22,506 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:31:22,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:22,507 INFO L225 Difference]: With dead ends: 287 [2020-12-22 10:31:22,507 INFO L226 Difference]: Without dead ends: 285 [2020-12-22 10:31:22,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:31:22,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-12-22 10:31:22,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 197. [2020-12-22 10:31:22,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-12-22 10:31:22,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 536 transitions. [2020-12-22 10:31:22,512 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 536 transitions. Word has length 14 [2020-12-22 10:31:22,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:22,512 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 536 transitions. [2020-12-22 10:31:22,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:31:22,512 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 536 transitions. [2020-12-22 10:31:22,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:31:22,512 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:22,512 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:22,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-12-22 10:31:22,713 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:22,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:22,714 INFO L82 PathProgramCache]: Analyzing trace with hash -428699941, now seen corresponding path program 115 times [2020-12-22 10:31:22,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:22,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135440126] [2020-12-22 10:31:22,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:22,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:22,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:22,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135440126] [2020-12-22 10:31:22,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893221991] [2020-12-22 10:31:22,854 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:22,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:31:22,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:23,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:23,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:31:23,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945770900] [2020-12-22 10:31:23,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:31:23,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:23,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:31:23,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:31:23,220 INFO L87 Difference]: Start difference. First operand 197 states and 536 transitions. Second operand 17 states. [2020-12-22 10:31:23,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:23,829 INFO L93 Difference]: Finished difference Result 284 states and 705 transitions. [2020-12-22 10:31:23,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:31:23,830 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:31:23,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:23,831 INFO L225 Difference]: With dead ends: 284 [2020-12-22 10:31:23,831 INFO L226 Difference]: Without dead ends: 282 [2020-12-22 10:31:23,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:31:23,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-12-22 10:31:23,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 194. [2020-12-22 10:31:23,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-22 10:31:23,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 528 transitions. [2020-12-22 10:31:23,836 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 528 transitions. Word has length 14 [2020-12-22 10:31:23,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:23,836 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 528 transitions. [2020-12-22 10:31:23,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:31:23,836 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 528 transitions. [2020-12-22 10:31:23,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:31:23,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:23,836 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:24,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:24,037 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:24,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:24,038 INFO L82 PathProgramCache]: Analyzing trace with hash -409931611, now seen corresponding path program 116 times [2020-12-22 10:31:24,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:24,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732268365] [2020-12-22 10:31:24,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:24,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:24,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732268365] [2020-12-22 10:31:24,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422250097] [2020-12-22 10:31:24,207 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:24,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:31:24,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:24,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:31:24,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:24,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:24,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:31:24,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855930927] [2020-12-22 10:31:24,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:31:24,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:24,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:31:24,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:31:24,616 INFO L87 Difference]: Start difference. First operand 194 states and 528 transitions. Second operand 17 states. [2020-12-22 10:31:25,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:25,526 INFO L93 Difference]: Finished difference Result 293 states and 723 transitions. [2020-12-22 10:31:25,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:31:25,528 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:31:25,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:25,530 INFO L225 Difference]: With dead ends: 293 [2020-12-22 10:31:25,530 INFO L226 Difference]: Without dead ends: 291 [2020-12-22 10:31:25,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=282, Invalid=710, Unknown=0, NotChecked=0, Total=992 [2020-12-22 10:31:25,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-12-22 10:31:25,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 195. [2020-12-22 10:31:25,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-22 10:31:25,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 533 transitions. [2020-12-22 10:31:25,536 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 533 transitions. Word has length 14 [2020-12-22 10:31:25,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:25,537 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 533 transitions. [2020-12-22 10:31:25,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:31:25,537 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 533 transitions. [2020-12-22 10:31:25,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:31:25,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:25,538 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:25,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:25,754 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:25,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:25,755 INFO L82 PathProgramCache]: Analyzing trace with hash -409326181, now seen corresponding path program 117 times [2020-12-22 10:31:25,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:25,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403507306] [2020-12-22 10:31:25,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:25,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403507306] [2020-12-22 10:31:25,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860113116] [2020-12-22 10:31:25,937 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:26,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:31:26,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:26,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 10:31:26,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:26,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:26,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-22 10:31:26,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224320847] [2020-12-22 10:31:26,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:31:26,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:26,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:31:26,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:31:26,226 INFO L87 Difference]: Start difference. First operand 195 states and 533 transitions. Second operand 16 states. [2020-12-22 10:31:27,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:27,058 INFO L93 Difference]: Finished difference Result 298 states and 743 transitions. [2020-12-22 10:31:27,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:31:27,060 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2020-12-22 10:31:27,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:27,061 INFO L225 Difference]: With dead ends: 298 [2020-12-22 10:31:27,061 INFO L226 Difference]: Without dead ends: 296 [2020-12-22 10:31:27,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2020-12-22 10:31:27,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-12-22 10:31:27,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 196. [2020-12-22 10:31:27,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-12-22 10:31:27,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 538 transitions. [2020-12-22 10:31:27,066 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 538 transitions. Word has length 14 [2020-12-22 10:31:27,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:27,066 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 538 transitions. [2020-12-22 10:31:27,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:31:27,066 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 538 transitions. [2020-12-22 10:31:27,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:31:27,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:27,067 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:27,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:27,268 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:27,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:27,268 INFO L82 PathProgramCache]: Analyzing trace with hash -409306744, now seen corresponding path program 118 times [2020-12-22 10:31:27,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:27,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375088694] [2020-12-22 10:31:27,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:27,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375088694] [2020-12-22 10:31:27,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861485001] [2020-12-22 10:31:27,481 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:27,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:31:27,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:27,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:31:27,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:27,777 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:31:27,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:27,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:27,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:31:27,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624837382] [2020-12-22 10:31:27,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:31:27,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:27,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:31:27,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:31:27,820 INFO L87 Difference]: Start difference. First operand 196 states and 538 transitions. Second operand 18 states. [2020-12-22 10:31:28,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:28,930 INFO L93 Difference]: Finished difference Result 329 states and 816 transitions. [2020-12-22 10:31:28,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 10:31:28,934 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:31:28,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:28,935 INFO L225 Difference]: With dead ends: 329 [2020-12-22 10:31:28,935 INFO L226 Difference]: Without dead ends: 317 [2020-12-22 10:31:28,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=409, Invalid=997, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 10:31:28,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-12-22 10:31:28,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 195. [2020-12-22 10:31:28,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-22 10:31:28,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 531 transitions. [2020-12-22 10:31:28,942 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 531 transitions. Word has length 14 [2020-12-22 10:31:28,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:28,942 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 531 transitions. [2020-12-22 10:31:28,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:31:28,942 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 531 transitions. [2020-12-22 10:31:28,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:31:28,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:28,943 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:29,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2020-12-22 10:31:29,157 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:29,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:29,157 INFO L82 PathProgramCache]: Analyzing trace with hash -406446808, now seen corresponding path program 119 times [2020-12-22 10:31:29,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:29,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465301407] [2020-12-22 10:31:29,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:29,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:29,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465301407] [2020-12-22 10:31:29,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675228126] [2020-12-22 10:31:29,327 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:29,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:31:29,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:29,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:31:29,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:29,676 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:31:29,678 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:31:29,679 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:31:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:29,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:29,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:31:29,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913997046] [2020-12-22 10:31:29,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:31:29,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:29,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:31:29,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:31:29,729 INFO L87 Difference]: Start difference. First operand 195 states and 531 transitions. Second operand 18 states. [2020-12-22 10:31:31,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:31,250 INFO L93 Difference]: Finished difference Result 357 states and 878 transitions. [2020-12-22 10:31:31,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 10:31:31,252 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:31:31,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:31,253 INFO L225 Difference]: With dead ends: 357 [2020-12-22 10:31:31,253 INFO L226 Difference]: Without dead ends: 345 [2020-12-22 10:31:31,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=459, Invalid=1101, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 10:31:31,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-12-22 10:31:31,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 189. [2020-12-22 10:31:31,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-22 10:31:31,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 511 transitions. [2020-12-22 10:31:31,259 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 511 transitions. Word has length 14 [2020-12-22 10:31:31,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:31,259 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 511 transitions. [2020-12-22 10:31:31,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:31:31,259 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 511 transitions. [2020-12-22 10:31:31,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:31:31,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:31,260 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:31,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-12-22 10:31:31,460 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:31,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:31,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1759455308, now seen corresponding path program 5 times [2020-12-22 10:31:31,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:31,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167851120] [2020-12-22 10:31:31,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:31,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167851120] [2020-12-22 10:31:31,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219261016] [2020-12-22 10:31:31,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:31,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-22 10:31:31,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:31,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:31:31,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:32,203 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:31:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:32,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:32,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2020-12-22 10:31:32,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955012017] [2020-12-22 10:31:32,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:31:32,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:32,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:31:32,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:31:32,255 INFO L87 Difference]: Start difference. First operand 189 states and 511 transitions. Second operand 22 states. [2020-12-22 10:31:32,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:32,867 INFO L93 Difference]: Finished difference Result 271 states and 683 transitions. [2020-12-22 10:31:32,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 10:31:32,869 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 15 [2020-12-22 10:31:32,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:32,870 INFO L225 Difference]: With dead ends: 271 [2020-12-22 10:31:32,870 INFO L226 Difference]: Without dead ends: 263 [2020-12-22 10:31:32,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=319, Invalid=737, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 10:31:32,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-12-22 10:31:32,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 199. [2020-12-22 10:31:32,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-22 10:31:32,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 543 transitions. [2020-12-22 10:31:32,875 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 543 transitions. Word has length 15 [2020-12-22 10:31:32,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:32,875 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 543 transitions. [2020-12-22 10:31:32,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 10:31:32,875 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 543 transitions. [2020-12-22 10:31:32,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:31:32,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:32,876 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:33,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-12-22 10:31:33,077 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:33,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:33,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1032767072, now seen corresponding path program 120 times [2020-12-22 10:31:33,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:33,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116080832] [2020-12-22 10:31:33,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:33,292 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:33,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116080832] [2020-12-22 10:31:33,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724321319] [2020-12-22 10:31:33,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:33,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-22 10:31:33,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:33,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:31:33,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:33,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:33,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:31:33,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687173929] [2020-12-22 10:31:33,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:31:33,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:33,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:31:33,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:31:33,757 INFO L87 Difference]: Start difference. First operand 199 states and 543 transitions. Second operand 19 states. [2020-12-22 10:31:34,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:34,167 INFO L93 Difference]: Finished difference Result 250 states and 646 transitions. [2020-12-22 10:31:34,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:31:34,168 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:31:34,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:34,169 INFO L225 Difference]: With dead ends: 250 [2020-12-22 10:31:34,170 INFO L226 Difference]: Without dead ends: 248 [2020-12-22 10:31:34,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2020-12-22 10:31:34,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-12-22 10:31:34,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 205. [2020-12-22 10:31:34,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-12-22 10:31:34,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 555 transitions. [2020-12-22 10:31:34,175 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 555 transitions. Word has length 15 [2020-12-22 10:31:34,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:34,175 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 555 transitions. [2020-12-22 10:31:34,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:31:34,175 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 555 transitions. [2020-12-22 10:31:34,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:31:34,175 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:34,175 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:34,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-12-22 10:31:34,376 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:34,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:34,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1033135352, now seen corresponding path program 121 times [2020-12-22 10:31:34,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:34,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987613609] [2020-12-22 10:31:34,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:34,600 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:34,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987613609] [2020-12-22 10:31:34,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012798846] [2020-12-22 10:31:34,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:34,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:34,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:31:34,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:35,029 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:31:35,030 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:31:35,032 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:31:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:35,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:35,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:31:35,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647496687] [2020-12-22 10:31:35,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:31:35,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:35,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:31:35,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:31:35,057 INFO L87 Difference]: Start difference. First operand 205 states and 555 transitions. Second operand 19 states. [2020-12-22 10:31:36,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:36,053 INFO L93 Difference]: Finished difference Result 300 states and 757 transitions. [2020-12-22 10:31:36,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:31:36,055 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:31:36,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:36,056 INFO L225 Difference]: With dead ends: 300 [2020-12-22 10:31:36,056 INFO L226 Difference]: Without dead ends: 292 [2020-12-22 10:31:36,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=350, Invalid=772, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 10:31:36,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-12-22 10:31:36,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 201. [2020-12-22 10:31:36,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-12-22 10:31:36,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 549 transitions. [2020-12-22 10:31:36,069 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 549 transitions. Word has length 15 [2020-12-22 10:31:36,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:36,069 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 549 transitions. [2020-12-22 10:31:36,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:31:36,070 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 549 transitions. [2020-12-22 10:31:36,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:31:36,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:36,070 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:36,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-12-22 10:31:36,272 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:36,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:36,272 INFO L82 PathProgramCache]: Analyzing trace with hash 684247825, now seen corresponding path program 122 times [2020-12-22 10:31:36,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:36,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630589872] [2020-12-22 10:31:36,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:36,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:36,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630589872] [2020-12-22 10:31:36,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815610033] [2020-12-22 10:31:36,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:36,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:31:36,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:36,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:31:36,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:36,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:36,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:31:36,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533403988] [2020-12-22 10:31:36,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:31:36,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:36,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:31:36,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:31:36,986 INFO L87 Difference]: Start difference. First operand 201 states and 549 transitions. Second operand 19 states. [2020-12-22 10:31:37,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:37,723 INFO L93 Difference]: Finished difference Result 284 states and 716 transitions. [2020-12-22 10:31:37,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:31:37,725 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:31:37,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:37,726 INFO L225 Difference]: With dead ends: 284 [2020-12-22 10:31:37,726 INFO L226 Difference]: Without dead ends: 282 [2020-12-22 10:31:37,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2020-12-22 10:31:37,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-12-22 10:31:37,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 206. [2020-12-22 10:31:37,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-12-22 10:31:37,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 558 transitions. [2020-12-22 10:31:37,731 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 558 transitions. Word has length 15 [2020-12-22 10:31:37,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:37,731 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 558 transitions. [2020-12-22 10:31:37,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:31:37,731 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 558 transitions. [2020-12-22 10:31:37,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:31:37,732 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:37,732 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:37,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-12-22 10:31:37,934 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:37,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:37,934 INFO L82 PathProgramCache]: Analyzing trace with hash 695664505, now seen corresponding path program 123 times [2020-12-22 10:31:37,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:37,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522896205] [2020-12-22 10:31:37,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:37,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:38,140 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:38,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522896205] [2020-12-22 10:31:38,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464396270] [2020-12-22 10:31:38,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:38,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:31:38,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:38,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 10:31:38,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:38,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:38,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-22 10:31:38,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737254524] [2020-12-22 10:31:38,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 10:31:38,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:38,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 10:31:38,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:31:38,384 INFO L87 Difference]: Start difference. First operand 206 states and 558 transitions. Second operand 15 states. [2020-12-22 10:31:38,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:38,994 INFO L93 Difference]: Finished difference Result 286 states and 727 transitions. [2020-12-22 10:31:38,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:31:38,996 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2020-12-22 10:31:38,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:38,998 INFO L225 Difference]: With dead ends: 286 [2020-12-22 10:31:38,998 INFO L226 Difference]: Without dead ends: 284 [2020-12-22 10:31:38,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:31:39,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-12-22 10:31:39,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 208. [2020-12-22 10:31:39,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-12-22 10:31:39,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 565 transitions. [2020-12-22 10:31:39,006 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 565 transitions. Word has length 15 [2020-12-22 10:31:39,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:39,006 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 565 transitions. [2020-12-22 10:31:39,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 10:31:39,007 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 565 transitions. [2020-12-22 10:31:39,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:31:39,008 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:39,008 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:39,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:39,222 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:39,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:39,223 INFO L82 PathProgramCache]: Analyzing trace with hash 695686825, now seen corresponding path program 124 times [2020-12-22 10:31:39,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:39,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770058955] [2020-12-22 10:31:39,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:39,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:39,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770058955] [2020-12-22 10:31:39,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658523140] [2020-12-22 10:31:39,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:39,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:31:39,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:39,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:31:39,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:39,859 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:31:39,863 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:31:39,864 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:31:39,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:39,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:39,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:31:39,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170877157] [2020-12-22 10:31:39,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:31:39,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:39,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:31:39,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:31:39,891 INFO L87 Difference]: Start difference. First operand 208 states and 565 transitions. Second operand 19 states. [2020-12-22 10:31:41,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:41,009 INFO L93 Difference]: Finished difference Result 316 states and 799 transitions. [2020-12-22 10:31:41,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 10:31:41,011 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:31:41,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:41,013 INFO L225 Difference]: With dead ends: 316 [2020-12-22 10:31:41,013 INFO L226 Difference]: Without dead ends: 308 [2020-12-22 10:31:41,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=394, Invalid=866, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 10:31:41,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-12-22 10:31:41,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 203. [2020-12-22 10:31:41,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-12-22 10:31:41,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 557 transitions. [2020-12-22 10:31:41,019 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 557 transitions. Word has length 15 [2020-12-22 10:31:41,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:41,020 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 557 transitions. [2020-12-22 10:31:41,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:31:41,020 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 557 transitions. [2020-12-22 10:31:41,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:31:41,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:41,020 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:41,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-12-22 10:31:41,221 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:41,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:41,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1529917123, now seen corresponding path program 125 times [2020-12-22 10:31:41,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:41,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071445830] [2020-12-22 10:31:41,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:41,456 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:41,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071445830] [2020-12-22 10:31:41,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179882319] [2020-12-22 10:31:41,457 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:41,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:31:41,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:41,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:31:41,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:41,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:41,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:31:41,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871102666] [2020-12-22 10:31:41,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:31:41,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:41,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:31:41,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:31:41,990 INFO L87 Difference]: Start difference. First operand 203 states and 557 transitions. Second operand 19 states. [2020-12-22 10:31:42,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:42,808 INFO L93 Difference]: Finished difference Result 293 states and 737 transitions. [2020-12-22 10:31:42,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:31:42,810 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:31:42,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:42,812 INFO L225 Difference]: With dead ends: 293 [2020-12-22 10:31:42,812 INFO L226 Difference]: Without dead ends: 291 [2020-12-22 10:31:42,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=263, Invalid=607, Unknown=0, NotChecked=0, Total=870 [2020-12-22 10:31:42,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-12-22 10:31:42,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 207. [2020-12-22 10:31:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-22 10:31:42,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 563 transitions. [2020-12-22 10:31:42,816 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 563 transitions. Word has length 15 [2020-12-22 10:31:42,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:42,816 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 563 transitions. [2020-12-22 10:31:42,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:31:42,817 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 563 transitions. [2020-12-22 10:31:42,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:31:42,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:42,817 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:43,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:43,018 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:43,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:43,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1176000043, now seen corresponding path program 126 times [2020-12-22 10:31:43,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:43,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223450205] [2020-12-22 10:31:43,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:43,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223450205] [2020-12-22 10:31:43,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106450093] [2020-12-22 10:31:43,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:43,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:31:43,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:43,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:31:43,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:43,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:43,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:43,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:31:43,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377493712] [2020-12-22 10:31:43,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:31:43,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:43,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:31:43,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:31:43,684 INFO L87 Difference]: Start difference. First operand 207 states and 563 transitions. Second operand 19 states. [2020-12-22 10:31:44,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:44,590 INFO L93 Difference]: Finished difference Result 304 states and 763 transitions. [2020-12-22 10:31:44,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:31:44,592 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:31:44,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:44,592 INFO L225 Difference]: With dead ends: 304 [2020-12-22 10:31:44,593 INFO L226 Difference]: Without dead ends: 302 [2020-12-22 10:31:44,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=265, Invalid=665, Unknown=0, NotChecked=0, Total=930 [2020-12-22 10:31:44,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-12-22 10:31:44,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 209. [2020-12-22 10:31:44,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-12-22 10:31:44,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 570 transitions. [2020-12-22 10:31:44,598 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 570 transitions. Word has length 15 [2020-12-22 10:31:44,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:44,598 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 570 transitions. [2020-12-22 10:31:44,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:31:44,598 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 570 transitions. [2020-12-22 10:31:44,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:31:44,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:44,599 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:44,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:44,800 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:44,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:44,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1175394613, now seen corresponding path program 127 times [2020-12-22 10:31:44,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:44,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905909130] [2020-12-22 10:31:44,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:44,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:44,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905909130] [2020-12-22 10:31:44,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540210264] [2020-12-22 10:31:44,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:45,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:45,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:31:45,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:45,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:45,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:31:45,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403191643] [2020-12-22 10:31:45,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:31:45,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:45,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:31:45,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:31:45,360 INFO L87 Difference]: Start difference. First operand 209 states and 570 transitions. Second operand 19 states. [2020-12-22 10:31:46,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:46,144 INFO L93 Difference]: Finished difference Result 307 states and 779 transitions. [2020-12-22 10:31:46,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:31:46,146 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:31:46,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:46,147 INFO L225 Difference]: With dead ends: 307 [2020-12-22 10:31:46,147 INFO L226 Difference]: Without dead ends: 305 [2020-12-22 10:31:46,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=335, Invalid=721, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 10:31:46,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-12-22 10:31:46,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 212. [2020-12-22 10:31:46,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-12-22 10:31:46,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 582 transitions. [2020-12-22 10:31:46,159 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 582 transitions. Word has length 15 [2020-12-22 10:31:46,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:46,159 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 582 transitions. [2020-12-22 10:31:46,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:31:46,159 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 582 transitions. [2020-12-22 10:31:46,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:31:46,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:46,160 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:46,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:46,374 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:46,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:46,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1175375176, now seen corresponding path program 128 times [2020-12-22 10:31:46,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:46,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418979791] [2020-12-22 10:31:46,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:46,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418979791] [2020-12-22 10:31:46,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721419744] [2020-12-22 10:31:46,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:46,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:31:46,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:46,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:31:46,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:46,920 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:31:46,921 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:31:46,922 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:31:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:46,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:46,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-22 10:31:46,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492190187] [2020-12-22 10:31:46,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:31:46,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:46,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:31:46,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:31:46,974 INFO L87 Difference]: Start difference. First operand 212 states and 582 transitions. Second operand 20 states. [2020-12-22 10:31:48,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:48,455 INFO L93 Difference]: Finished difference Result 372 states and 936 transitions. [2020-12-22 10:31:48,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 10:31:48,456 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-22 10:31:48,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:48,457 INFO L225 Difference]: With dead ends: 372 [2020-12-22 10:31:48,457 INFO L226 Difference]: Without dead ends: 360 [2020-12-22 10:31:48,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=540, Invalid=1182, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 10:31:48,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-12-22 10:31:48,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 205. [2020-12-22 10:31:48,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-12-22 10:31:48,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 565 transitions. [2020-12-22 10:31:48,463 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 565 transitions. Word has length 15 [2020-12-22 10:31:48,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:48,463 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 565 transitions. [2020-12-22 10:31:48,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:31:48,463 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 565 transitions. [2020-12-22 10:31:48,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:31:48,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:48,464 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:48,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:48,669 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:48,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:48,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1449464402, now seen corresponding path program 129 times [2020-12-22 10:31:48,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:48,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648241796] [2020-12-22 10:31:48,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:48,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648241796] [2020-12-22 10:31:48,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362846114] [2020-12-22 10:31:48,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:48,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:31:48,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:48,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:31:48,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:49,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:49,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:49,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:31:49,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142679744] [2020-12-22 10:31:49,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:31:49,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:49,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:31:49,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:31:49,363 INFO L87 Difference]: Start difference. First operand 205 states and 565 transitions. Second operand 19 states. [2020-12-22 10:31:50,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:50,218 INFO L93 Difference]: Finished difference Result 308 states and 774 transitions. [2020-12-22 10:31:50,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:31:50,220 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:31:50,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:50,220 INFO L225 Difference]: With dead ends: 308 [2020-12-22 10:31:50,221 INFO L226 Difference]: Without dead ends: 306 [2020-12-22 10:31:50,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-12-22 10:31:50,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-12-22 10:31:50,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 210. [2020-12-22 10:31:50,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-12-22 10:31:50,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 574 transitions. [2020-12-22 10:31:50,226 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 574 transitions. Word has length 15 [2020-12-22 10:31:50,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:50,226 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 574 transitions. [2020-12-22 10:31:50,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:31:50,226 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 574 transitions. [2020-12-22 10:31:50,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:31:50,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:50,226 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:50,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-12-22 10:31:50,427 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:50,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:50,428 INFO L82 PathProgramCache]: Analyzing trace with hash 932030486, now seen corresponding path program 130 times [2020-12-22 10:31:50,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:50,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246312344] [2020-12-22 10:31:50,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:50,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246312344] [2020-12-22 10:31:50,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95076889] [2020-12-22 10:31:50,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:50,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:31:50,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:50,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:31:50,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:51,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:51,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:51,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:31:51,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622639575] [2020-12-22 10:31:51,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:31:51,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:51,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:31:51,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:31:51,117 INFO L87 Difference]: Start difference. First operand 210 states and 574 transitions. Second operand 19 states. [2020-12-22 10:31:51,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:51,992 INFO L93 Difference]: Finished difference Result 310 states and 776 transitions. [2020-12-22 10:31:51,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:31:51,993 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:31:51,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:51,994 INFO L225 Difference]: With dead ends: 310 [2020-12-22 10:31:51,994 INFO L226 Difference]: Without dead ends: 308 [2020-12-22 10:31:51,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=251, Invalid=679, Unknown=0, NotChecked=0, Total=930 [2020-12-22 10:31:51,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-12-22 10:31:51,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 210. [2020-12-22 10:31:51,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-12-22 10:31:51,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 573 transitions. [2020-12-22 10:31:51,998 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 573 transitions. Word has length 15 [2020-12-22 10:31:51,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:51,998 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 573 transitions. [2020-12-22 10:31:51,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:31:51,998 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 573 transitions. [2020-12-22 10:31:51,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:31:51,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:51,999 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:52,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-12-22 10:31:52,200 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:52,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:52,200 INFO L82 PathProgramCache]: Analyzing trace with hash 953480006, now seen corresponding path program 131 times [2020-12-22 10:31:52,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:52,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194041750] [2020-12-22 10:31:52,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:52,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:52,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194041750] [2020-12-22 10:31:52,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380410737] [2020-12-22 10:31:52,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:52,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:31:52,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:52,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:31:52,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:52,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:52,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:31:52,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25035928] [2020-12-22 10:31:52,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:31:52,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:52,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:31:52,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:31:52,931 INFO L87 Difference]: Start difference. First operand 210 states and 573 transitions. Second operand 19 states. [2020-12-22 10:31:54,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:54,038 INFO L93 Difference]: Finished difference Result 333 states and 830 transitions. [2020-12-22 10:31:54,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 10:31:54,040 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:31:54,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:54,041 INFO L225 Difference]: With dead ends: 333 [2020-12-22 10:31:54,041 INFO L226 Difference]: Without dead ends: 331 [2020-12-22 10:31:54,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=350, Invalid=910, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 10:31:54,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-12-22 10:31:54,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 212. [2020-12-22 10:31:54,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-12-22 10:31:54,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 580 transitions. [2020-12-22 10:31:54,046 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 580 transitions. Word has length 15 [2020-12-22 10:31:54,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:54,046 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 580 transitions. [2020-12-22 10:31:54,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:31:54,046 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 580 transitions. [2020-12-22 10:31:54,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:31:54,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:54,047 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:54,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-12-22 10:31:54,250 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:54,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:54,251 INFO L82 PathProgramCache]: Analyzing trace with hash 954085436, now seen corresponding path program 132 times [2020-12-22 10:31:54,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:54,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139393969] [2020-12-22 10:31:54,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:54,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139393969] [2020-12-22 10:31:54,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361587705] [2020-12-22 10:31:54,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:54,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:31:54,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:54,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:31:54,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:54,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:54,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:31:54,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284389785] [2020-12-22 10:31:54,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:31:54,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:54,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:31:54,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:31:54,910 INFO L87 Difference]: Start difference. First operand 212 states and 580 transitions. Second operand 19 states. [2020-12-22 10:31:56,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:56,052 INFO L93 Difference]: Finished difference Result 316 states and 803 transitions. [2020-12-22 10:31:56,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:31:56,053 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:31:56,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:56,054 INFO L225 Difference]: With dead ends: 316 [2020-12-22 10:31:56,054 INFO L226 Difference]: Without dead ends: 314 [2020-12-22 10:31:56,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 10:31:56,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-12-22 10:31:56,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 214. [2020-12-22 10:31:56,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-12-22 10:31:56,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 587 transitions. [2020-12-22 10:31:56,061 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 587 transitions. Word has length 15 [2020-12-22 10:31:56,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:56,061 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 587 transitions. [2020-12-22 10:31:56,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:31:56,061 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 587 transitions. [2020-12-22 10:31:56,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:31:56,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:56,062 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:56,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-12-22 10:31:56,264 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:56,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:56,264 INFO L82 PathProgramCache]: Analyzing trace with hash 954104873, now seen corresponding path program 133 times [2020-12-22 10:31:56,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:56,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195892152] [2020-12-22 10:31:56,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:56,456 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:56,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195892152] [2020-12-22 10:31:56,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331947857] [2020-12-22 10:31:56,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:56,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:56,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:31:56,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:56,871 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:31:56,873 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:31:56,875 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:31:56,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:56,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:56,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-22 10:31:56,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162594908] [2020-12-22 10:31:56,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:31:56,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:56,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:31:56,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:31:56,927 INFO L87 Difference]: Start difference. First operand 214 states and 587 transitions. Second operand 20 states. [2020-12-22 10:31:58,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:58,704 INFO L93 Difference]: Finished difference Result 383 states and 959 transitions. [2020-12-22 10:31:58,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 10:31:58,705 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-22 10:31:58,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:58,706 INFO L225 Difference]: With dead ends: 383 [2020-12-22 10:31:58,706 INFO L226 Difference]: Without dead ends: 371 [2020-12-22 10:31:58,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=660, Invalid=1596, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 10:31:58,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-12-22 10:31:58,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 208. [2020-12-22 10:31:58,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-12-22 10:31:58,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 578 transitions. [2020-12-22 10:31:58,712 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 578 transitions. Word has length 15 [2020-12-22 10:31:58,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:58,712 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 578 transitions. [2020-12-22 10:31:58,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:31:58,713 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 578 transitions. [2020-12-22 10:31:58,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:31:58,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:58,713 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:58,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:58,922 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:58,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:58,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1041710013, now seen corresponding path program 134 times [2020-12-22 10:31:58,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:58,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234306655] [2020-12-22 10:31:58,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:58,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:59,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234306655] [2020-12-22 10:31:59,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077385790] [2020-12-22 10:31:59,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:59,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:31:59,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:59,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:31:59,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:59,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:59,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:31:59,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180772853] [2020-12-22 10:31:59,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:31:59,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:59,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:31:59,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:31:59,574 INFO L87 Difference]: Start difference. First operand 208 states and 578 transitions. Second operand 19 states. [2020-12-22 10:32:00,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:00,508 INFO L93 Difference]: Finished difference Result 306 states and 776 transitions. [2020-12-22 10:32:00,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:32:00,509 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:32:00,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:00,510 INFO L225 Difference]: With dead ends: 306 [2020-12-22 10:32:00,510 INFO L226 Difference]: Without dead ends: 304 [2020-12-22 10:32:00,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 10:32:00,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-12-22 10:32:00,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 209. [2020-12-22 10:32:00,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-12-22 10:32:00,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 581 transitions. [2020-12-22 10:32:00,514 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 581 transitions. Word has length 15 [2020-12-22 10:32:00,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:00,514 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 581 transitions. [2020-12-22 10:32:00,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:32:00,515 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 581 transitions. [2020-12-22 10:32:00,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:00,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:00,515 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:00,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2020-12-22 10:32:00,721 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:00,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:00,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1041712896, now seen corresponding path program 135 times [2020-12-22 10:32:00,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:00,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904846806] [2020-12-22 10:32:00,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:00,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:00,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:00,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904846806] [2020-12-22 10:32:00,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155337955] [2020-12-22 10:32:00,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:00,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:32:00,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:00,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:32:00,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:01,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:01,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:01,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:32:01,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060447793] [2020-12-22 10:32:01,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:32:01,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:01,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:32:01,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:32:01,369 INFO L87 Difference]: Start difference. First operand 209 states and 581 transitions. Second operand 19 states. [2020-12-22 10:32:02,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:02,270 INFO L93 Difference]: Finished difference Result 317 states and 804 transitions. [2020-12-22 10:32:02,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:32:02,272 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:32:02,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:02,273 INFO L225 Difference]: With dead ends: 317 [2020-12-22 10:32:02,273 INFO L226 Difference]: Without dead ends: 315 [2020-12-22 10:32:02,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2020-12-22 10:32:02,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-12-22 10:32:02,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 210. [2020-12-22 10:32:02,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-12-22 10:32:02,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 584 transitions. [2020-12-22 10:32:02,277 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 584 transitions. Word has length 15 [2020-12-22 10:32:02,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:02,278 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 584 transitions. [2020-12-22 10:32:02,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:32:02,278 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 584 transitions. [2020-12-22 10:32:02,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:02,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:02,278 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:02,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:02,479 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:02,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:02,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1041799386, now seen corresponding path program 136 times [2020-12-22 10:32:02,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:02,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079589473] [2020-12-22 10:32:02,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:02,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:02,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:02,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079589473] [2020-12-22 10:32:02,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785405451] [2020-12-22 10:32:02,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:02,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:32:02,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:02,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:32:02,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:03,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:03,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:32:03,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528057385] [2020-12-22 10:32:03,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:32:03,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:03,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:32:03,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:32:03,214 INFO L87 Difference]: Start difference. First operand 210 states and 584 transitions. Second operand 19 states. [2020-12-22 10:32:04,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:04,042 INFO L93 Difference]: Finished difference Result 312 states and 793 transitions. [2020-12-22 10:32:04,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:32:04,043 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:32:04,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:04,044 INFO L225 Difference]: With dead ends: 312 [2020-12-22 10:32:04,044 INFO L226 Difference]: Without dead ends: 310 [2020-12-22 10:32:04,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=282, Invalid=648, Unknown=0, NotChecked=0, Total=930 [2020-12-22 10:32:04,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-12-22 10:32:04,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 211. [2020-12-22 10:32:04,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-12-22 10:32:04,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 587 transitions. [2020-12-22 10:32:04,047 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 587 transitions. Word has length 15 [2020-12-22 10:32:04,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:04,047 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 587 transitions. [2020-12-22 10:32:04,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:32:04,048 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 587 transitions. [2020-12-22 10:32:04,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:04,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:04,048 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:04,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:04,249 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:04,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:04,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1044572832, now seen corresponding path program 137 times [2020-12-22 10:32:04,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:04,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000131814] [2020-12-22 10:32:04,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:04,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:04,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:04,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000131814] [2020-12-22 10:32:04,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67380021] [2020-12-22 10:32:04,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:04,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:32:04,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:04,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:32:04,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:04,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:04,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:32:04,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201821103] [2020-12-22 10:32:04,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:32:04,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:04,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:32:04,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:32:04,847 INFO L87 Difference]: Start difference. First operand 211 states and 587 transitions. Second operand 19 states. [2020-12-22 10:32:05,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:05,532 INFO L93 Difference]: Finished difference Result 305 states and 775 transitions. [2020-12-22 10:32:05,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:32:05,534 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:32:05,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:05,534 INFO L225 Difference]: With dead ends: 305 [2020-12-22 10:32:05,535 INFO L226 Difference]: Without dead ends: 303 [2020-12-22 10:32:05,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=233, Invalid=579, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:32:05,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-12-22 10:32:05,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 214. [2020-12-22 10:32:05,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-12-22 10:32:05,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 590 transitions. [2020-12-22 10:32:05,539 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 590 transitions. Word has length 15 [2020-12-22 10:32:05,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:05,539 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 590 transitions. [2020-12-22 10:32:05,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:32:05,539 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 590 transitions. [2020-12-22 10:32:05,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:05,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:05,540 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:05,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:05,741 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:05,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:05,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1853607509, now seen corresponding path program 138 times [2020-12-22 10:32:05,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:05,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679084572] [2020-12-22 10:32:05,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:05,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:05,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679084572] [2020-12-22 10:32:05,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987693085] [2020-12-22 10:32:05,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:05,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:32:05,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:05,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:32:05,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:06,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:06,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:32:06,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371772233] [2020-12-22 10:32:06,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:32:06,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:06,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:32:06,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:32:06,342 INFO L87 Difference]: Start difference. First operand 214 states and 590 transitions. Second operand 19 states. [2020-12-22 10:32:07,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:07,231 INFO L93 Difference]: Finished difference Result 322 states and 807 transitions. [2020-12-22 10:32:07,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 10:32:07,232 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:32:07,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:07,233 INFO L225 Difference]: With dead ends: 322 [2020-12-22 10:32:07,233 INFO L226 Difference]: Without dead ends: 320 [2020-12-22 10:32:07,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=267, Invalid=725, Unknown=0, NotChecked=0, Total=992 [2020-12-22 10:32:07,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-12-22 10:32:07,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 214. [2020-12-22 10:32:07,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-12-22 10:32:07,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 590 transitions. [2020-12-22 10:32:07,237 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 590 transitions. Word has length 15 [2020-12-22 10:32:07,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:07,238 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 590 transitions. [2020-12-22 10:32:07,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:32:07,238 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 590 transitions. [2020-12-22 10:32:07,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:07,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:07,238 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:07,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2020-12-22 10:32:07,439 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:07,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:07,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1853610392, now seen corresponding path program 139 times [2020-12-22 10:32:07,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:07,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380333169] [2020-12-22 10:32:07,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:07,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:07,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380333169] [2020-12-22 10:32:07,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227546181] [2020-12-22 10:32:07,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:07,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:32:07,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:08,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:08,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:08,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:32:08,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681246138] [2020-12-22 10:32:08,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:32:08,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:08,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:32:08,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:32:08,263 INFO L87 Difference]: Start difference. First operand 214 states and 590 transitions. Second operand 19 states. [2020-12-22 10:32:09,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:09,209 INFO L93 Difference]: Finished difference Result 327 states and 823 transitions. [2020-12-22 10:32:09,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:32:09,211 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:32:09,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:09,212 INFO L225 Difference]: With dead ends: 327 [2020-12-22 10:32:09,212 INFO L226 Difference]: Without dead ends: 325 [2020-12-22 10:32:09,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=248, Invalid=682, Unknown=0, NotChecked=0, Total=930 [2020-12-22 10:32:09,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-12-22 10:32:09,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 215. [2020-12-22 10:32:09,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-12-22 10:32:09,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 593 transitions. [2020-12-22 10:32:09,216 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 593 transitions. Word has length 15 [2020-12-22 10:32:09,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:09,217 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 593 transitions. [2020-12-22 10:32:09,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:32:09,217 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 593 transitions. [2020-12-22 10:32:09,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:09,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:09,217 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:09,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:09,422 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:09,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:09,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1853696882, now seen corresponding path program 140 times [2020-12-22 10:32:09,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:09,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451292193] [2020-12-22 10:32:09,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:09,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:09,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451292193] [2020-12-22 10:32:09,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849327621] [2020-12-22 10:32:09,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:09,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:32:09,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:09,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:32:09,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:10,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:10,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:32:10,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615698114] [2020-12-22 10:32:10,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:32:10,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:10,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:32:10,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:32:10,159 INFO L87 Difference]: Start difference. First operand 215 states and 593 transitions. Second operand 19 states. [2020-12-22 10:32:10,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:10,991 INFO L93 Difference]: Finished difference Result 319 states and 805 transitions. [2020-12-22 10:32:10,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:32:10,992 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:32:10,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:10,993 INFO L225 Difference]: With dead ends: 319 [2020-12-22 10:32:10,993 INFO L226 Difference]: Without dead ends: 317 [2020-12-22 10:32:10,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=250, Invalid=680, Unknown=0, NotChecked=0, Total=930 [2020-12-22 10:32:10,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-12-22 10:32:10,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 215. [2020-12-22 10:32:10,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-12-22 10:32:10,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 593 transitions. [2020-12-22 10:32:10,997 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 593 transitions. Word has length 15 [2020-12-22 10:32:10,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:10,997 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 593 transitions. [2020-12-22 10:32:10,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:32:10,998 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 593 transitions. [2020-12-22 10:32:10,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:10,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:10,998 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:11,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-12-22 10:32:11,199 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:11,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:11,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1856470328, now seen corresponding path program 141 times [2020-12-22 10:32:11,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:11,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679891880] [2020-12-22 10:32:11,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:11,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:11,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679891880] [2020-12-22 10:32:11,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380939822] [2020-12-22 10:32:11,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:11,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:32:11,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:11,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:32:11,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:11,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:11,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:11,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:32:11,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804151315] [2020-12-22 10:32:11,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:32:11,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:11,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:32:11,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:32:11,844 INFO L87 Difference]: Start difference. First operand 215 states and 593 transitions. Second operand 19 states. [2020-12-22 10:32:12,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:12,505 INFO L93 Difference]: Finished difference Result 303 states and 769 transitions. [2020-12-22 10:32:12,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:32:12,506 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:32:12,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:12,507 INFO L225 Difference]: With dead ends: 303 [2020-12-22 10:32:12,507 INFO L226 Difference]: Without dead ends: 301 [2020-12-22 10:32:12,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=230, Invalid=640, Unknown=0, NotChecked=0, Total=870 [2020-12-22 10:32:12,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-12-22 10:32:12,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 214. [2020-12-22 10:32:12,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-12-22 10:32:12,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 589 transitions. [2020-12-22 10:32:12,512 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 589 transitions. Word has length 15 [2020-12-22 10:32:12,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:12,512 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 589 transitions. [2020-12-22 10:32:12,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:32:12,512 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 589 transitions. [2020-12-22 10:32:12,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:12,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:12,513 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:12,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:12,713 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:12,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:12,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1859541557, now seen corresponding path program 142 times [2020-12-22 10:32:12,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:12,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044558814] [2020-12-22 10:32:12,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:12,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044558814] [2020-12-22 10:32:12,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720784235] [2020-12-22 10:32:12,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:12,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:32:12,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:12,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:32:12,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:13,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:13,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:32:13,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737183565] [2020-12-22 10:32:13,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:32:13,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:13,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:32:13,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:32:13,365 INFO L87 Difference]: Start difference. First operand 214 states and 589 transitions. Second operand 19 states. [2020-12-22 10:32:14,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:14,665 INFO L93 Difference]: Finished difference Result 332 states and 827 transitions. [2020-12-22 10:32:14,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 10:32:14,667 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:32:14,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:14,668 INFO L225 Difference]: With dead ends: 332 [2020-12-22 10:32:14,668 INFO L226 Difference]: Without dead ends: 330 [2020-12-22 10:32:14,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=386, Invalid=1020, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 10:32:14,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-12-22 10:32:14,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 215. [2020-12-22 10:32:14,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-12-22 10:32:14,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 594 transitions. [2020-12-22 10:32:14,673 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 594 transitions. Word has length 15 [2020-12-22 10:32:14,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:14,673 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 594 transitions. [2020-12-22 10:32:14,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:32:14,673 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 594 transitions. [2020-12-22 10:32:14,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:14,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:14,674 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:14,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-12-22 10:32:14,874 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:14,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:14,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1859538674, now seen corresponding path program 143 times [2020-12-22 10:32:14,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:14,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551568953] [2020-12-22 10:32:14,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:15,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:15,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551568953] [2020-12-22 10:32:15,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540402921] [2020-12-22 10:32:15,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:15,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:32:15,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:15,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:32:15,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:15,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:15,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:32:15,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851041711] [2020-12-22 10:32:15,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:32:15,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:15,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:32:15,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:32:15,518 INFO L87 Difference]: Start difference. First operand 215 states and 594 transitions. Second operand 19 states. [2020-12-22 10:32:16,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:16,664 INFO L93 Difference]: Finished difference Result 329 states and 825 transitions. [2020-12-22 10:32:16,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:32:16,665 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:32:16,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:16,666 INFO L225 Difference]: With dead ends: 329 [2020-12-22 10:32:16,666 INFO L226 Difference]: Without dead ends: 327 [2020-12-22 10:32:16,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 10:32:16,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-12-22 10:32:16,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 217. [2020-12-22 10:32:16,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-22 10:32:16,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 599 transitions. [2020-12-22 10:32:16,671 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 599 transitions. Word has length 15 [2020-12-22 10:32:16,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:16,671 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 599 transitions. [2020-12-22 10:32:16,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:32:16,671 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 599 transitions. [2020-12-22 10:32:16,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:16,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:16,671 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:16,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-12-22 10:32:16,872 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:16,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:16,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1859452184, now seen corresponding path program 144 times [2020-12-22 10:32:16,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:16,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9439864] [2020-12-22 10:32:16,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:17,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9439864] [2020-12-22 10:32:17,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880079183] [2020-12-22 10:32:17,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:17,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:32:17,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:17,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:32:17,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:17,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:17,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:17,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:32:17,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428517738] [2020-12-22 10:32:17,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:32:17,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:17,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:32:17,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:32:17,544 INFO L87 Difference]: Start difference. First operand 217 states and 599 transitions. Second operand 19 states. [2020-12-22 10:32:18,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:18,665 INFO L93 Difference]: Finished difference Result 322 states and 809 transitions. [2020-12-22 10:32:18,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 10:32:18,667 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:32:18,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:18,668 INFO L225 Difference]: With dead ends: 322 [2020-12-22 10:32:18,668 INFO L226 Difference]: Without dead ends: 320 [2020-12-22 10:32:18,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=313, Invalid=809, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 10:32:18,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-12-22 10:32:18,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 216. [2020-12-22 10:32:18,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-12-22 10:32:18,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 596 transitions. [2020-12-22 10:32:18,673 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 596 transitions. Word has length 15 [2020-12-22 10:32:18,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:18,674 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 596 transitions. [2020-12-22 10:32:18,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:32:18,674 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 596 transitions. [2020-12-22 10:32:18,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:18,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:18,674 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:18,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:18,875 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:18,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:18,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1840773227, now seen corresponding path program 145 times [2020-12-22 10:32:18,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:18,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545740123] [2020-12-22 10:32:18,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:19,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545740123] [2020-12-22 10:32:19,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933454856] [2020-12-22 10:32:19,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:19,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:32:19,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:19,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:19,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:32:19,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52776658] [2020-12-22 10:32:19,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:32:19,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:19,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:32:19,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:32:19,528 INFO L87 Difference]: Start difference. First operand 216 states and 596 transitions. Second operand 19 states. [2020-12-22 10:32:21,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:21,036 INFO L93 Difference]: Finished difference Result 336 states and 836 transitions. [2020-12-22 10:32:21,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 10:32:21,037 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:32:21,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:21,038 INFO L225 Difference]: With dead ends: 336 [2020-12-22 10:32:21,039 INFO L226 Difference]: Without dead ends: 334 [2020-12-22 10:32:21,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=460, Invalid=1100, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 10:32:21,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-12-22 10:32:21,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 217. [2020-12-22 10:32:21,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-22 10:32:21,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 601 transitions. [2020-12-22 10:32:21,043 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 601 transitions. Word has length 15 [2020-12-22 10:32:21,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:21,043 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 601 transitions. [2020-12-22 10:32:21,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:32:21,043 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 601 transitions. [2020-12-22 10:32:21,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:21,044 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:21,044 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:21,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:21,245 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:21,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:21,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1840770344, now seen corresponding path program 146 times [2020-12-22 10:32:21,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:21,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786721209] [2020-12-22 10:32:21,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:21,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:21,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786721209] [2020-12-22 10:32:21,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815469946] [2020-12-22 10:32:21,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:21,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:32:21,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:21,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:32:21,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:21,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:21,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:32:21,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639972413] [2020-12-22 10:32:21,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:32:21,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:21,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:32:21,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:32:21,951 INFO L87 Difference]: Start difference. First operand 217 states and 601 transitions. Second operand 19 states. [2020-12-22 10:32:23,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:23,219 INFO L93 Difference]: Finished difference Result 335 states and 843 transitions. [2020-12-22 10:32:23,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 10:32:23,221 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:32:23,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:23,222 INFO L225 Difference]: With dead ends: 335 [2020-12-22 10:32:23,222 INFO L226 Difference]: Without dead ends: 333 [2020-12-22 10:32:23,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 10:32:23,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-12-22 10:32:23,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 219. [2020-12-22 10:32:23,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-12-22 10:32:23,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 608 transitions. [2020-12-22 10:32:23,228 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 608 transitions. Word has length 15 [2020-12-22 10:32:23,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:23,228 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 608 transitions. [2020-12-22 10:32:23,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:32:23,228 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 608 transitions. [2020-12-22 10:32:23,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:23,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:23,229 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:23,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-12-22 10:32:23,445 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:23,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:23,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1840167797, now seen corresponding path program 147 times [2020-12-22 10:32:23,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:23,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849312048] [2020-12-22 10:32:23,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:23,642 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:23,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849312048] [2020-12-22 10:32:23,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918814669] [2020-12-22 10:32:23,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:23,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:32:23,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:23,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:32:23,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:24,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:24,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:32:24,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398984944] [2020-12-22 10:32:24,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:32:24,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:24,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:32:24,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:32:24,150 INFO L87 Difference]: Start difference. First operand 219 states and 608 transitions. Second operand 19 states. [2020-12-22 10:32:25,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:25,605 INFO L93 Difference]: Finished difference Result 323 states and 816 transitions. [2020-12-22 10:32:25,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 10:32:25,606 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:32:25,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:25,607 INFO L225 Difference]: With dead ends: 323 [2020-12-22 10:32:25,608 INFO L226 Difference]: Without dead ends: 321 [2020-12-22 10:32:25,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=485, Invalid=1075, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 10:32:25,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-12-22 10:32:25,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 221. [2020-12-22 10:32:25,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-12-22 10:32:25,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 615 transitions. [2020-12-22 10:32:25,612 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 615 transitions. Word has length 15 [2020-12-22 10:32:25,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:25,613 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 615 transitions. [2020-12-22 10:32:25,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:32:25,613 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 615 transitions. [2020-12-22 10:32:25,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:25,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:25,613 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:25,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:25,817 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:25,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:25,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1840148360, now seen corresponding path program 148 times [2020-12-22 10:32:25,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:25,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647032382] [2020-12-22 10:32:25,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:25,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:26,052 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:26,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647032382] [2020-12-22 10:32:26,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906318996] [2020-12-22 10:32:26,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:26,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:32:26,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:26,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:32:26,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:26,502 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:32:26,504 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:32:26,505 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:32:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:26,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:26,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-22 10:32:26,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032327249] [2020-12-22 10:32:26,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:32:26,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:26,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:32:26,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:32:26,558 INFO L87 Difference]: Start difference. First operand 221 states and 615 transitions. Second operand 20 states. [2020-12-22 10:32:28,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:28,529 INFO L93 Difference]: Finished difference Result 363 states and 911 transitions. [2020-12-22 10:32:28,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 10:32:28,531 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-22 10:32:28,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:28,532 INFO L225 Difference]: With dead ends: 363 [2020-12-22 10:32:28,532 INFO L226 Difference]: Without dead ends: 351 [2020-12-22 10:32:28,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=688, Invalid=1568, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 10:32:28,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-12-22 10:32:28,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 220. [2020-12-22 10:32:28,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-12-22 10:32:28,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 611 transitions. [2020-12-22 10:32:28,536 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 611 transitions. Word has length 15 [2020-12-22 10:32:28,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:28,537 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 611 transitions. [2020-12-22 10:32:28,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:32:28,537 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 611 transitions. [2020-12-22 10:32:28,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:28,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:28,537 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:28,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:28,738 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:28,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:28,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1840078424, now seen corresponding path program 149 times [2020-12-22 10:32:28,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:28,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52820672] [2020-12-22 10:32:28,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:28,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:28,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52820672] [2020-12-22 10:32:28,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564599721] [2020-12-22 10:32:28,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:29,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:32:29,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:29,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:32:29,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:29,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:29,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:32:29,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178869337] [2020-12-22 10:32:29,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:32:29,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:29,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:32:29,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:32:29,487 INFO L87 Difference]: Start difference. First operand 220 states and 611 transitions. Second operand 19 states. [2020-12-22 10:32:31,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:31,056 INFO L93 Difference]: Finished difference Result 339 states and 876 transitions. [2020-12-22 10:32:31,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 10:32:31,057 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:32:31,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:31,058 INFO L225 Difference]: With dead ends: 339 [2020-12-22 10:32:31,058 INFO L226 Difference]: Without dead ends: 337 [2020-12-22 10:32:31,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=442, Invalid=1040, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 10:32:31,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-12-22 10:32:31,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 222. [2020-12-22 10:32:31,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-12-22 10:32:31,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 618 transitions. [2020-12-22 10:32:31,063 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 618 transitions. Word has length 15 [2020-12-22 10:32:31,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:31,063 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 618 transitions. [2020-12-22 10:32:31,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:32:31,064 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 618 transitions. [2020-12-22 10:32:31,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:31,064 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:31,064 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:31,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:31,265 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:31,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:31,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1840058987, now seen corresponding path program 150 times [2020-12-22 10:32:31,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:31,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234305985] [2020-12-22 10:32:31,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:31,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:31,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234305985] [2020-12-22 10:32:31,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218916094] [2020-12-22 10:32:31,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:31,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:32:31,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:31,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:32:31,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:32,008 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:32:32,010 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:32:32,011 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:32:32,013 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:32:32,015 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:32:32,016 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:32:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:32,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:32,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-22 10:32:32,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125674733] [2020-12-22 10:32:32,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:32:32,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:32,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:32:32,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:32:32,073 INFO L87 Difference]: Start difference. First operand 222 states and 618 transitions. Second operand 20 states. [2020-12-22 10:32:34,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:34,184 INFO L93 Difference]: Finished difference Result 399 states and 1017 transitions. [2020-12-22 10:32:34,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 10:32:34,186 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-22 10:32:34,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:34,187 INFO L225 Difference]: With dead ends: 399 [2020-12-22 10:32:34,187 INFO L226 Difference]: Without dead ends: 387 [2020-12-22 10:32:34,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=643, Invalid=1519, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 10:32:34,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-12-22 10:32:34,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 220. [2020-12-22 10:32:34,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-12-22 10:32:34,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 610 transitions. [2020-12-22 10:32:34,192 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 610 transitions. Word has length 15 [2020-12-22 10:32:34,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:34,192 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 610 transitions. [2020-12-22 10:32:34,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:32:34,193 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 610 transitions. [2020-12-22 10:32:34,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:34,193 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:34,193 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:34,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2020-12-22 10:32:34,394 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:34,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:34,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1837288424, now seen corresponding path program 151 times [2020-12-22 10:32:34,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:34,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189056906] [2020-12-22 10:32:34,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:34,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:34,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189056906] [2020-12-22 10:32:34,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491220491] [2020-12-22 10:32:34,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:34,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:34,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:32:34,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:35,232 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:32:35,255 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:32:35,256 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:32:35,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:35,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:35,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-22 10:32:35,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438787026] [2020-12-22 10:32:35,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:32:35,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:35,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:32:35,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:32:35,320 INFO L87 Difference]: Start difference. First operand 220 states and 610 transitions. Second operand 20 states. [2020-12-22 10:32:37,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:37,762 INFO L93 Difference]: Finished difference Result 403 states and 1016 transitions. [2020-12-22 10:32:37,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 10:32:37,764 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-22 10:32:37,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:37,765 INFO L225 Difference]: With dead ends: 403 [2020-12-22 10:32:37,765 INFO L226 Difference]: Without dead ends: 391 [2020-12-22 10:32:37,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=663, Invalid=1689, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 10:32:37,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-12-22 10:32:37,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 208. [2020-12-22 10:32:37,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-12-22 10:32:37,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 578 transitions. [2020-12-22 10:32:37,770 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 578 transitions. Word has length 15 [2020-12-22 10:32:37,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:37,771 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 578 transitions. [2020-12-22 10:32:37,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:32:37,771 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 578 transitions. [2020-12-22 10:32:37,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:37,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:37,771 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:37,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:37,972 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:37,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:37,973 INFO L82 PathProgramCache]: Analyzing trace with hash 961478996, now seen corresponding path program 152 times [2020-12-22 10:32:37,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:37,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096679697] [2020-12-22 10:32:37,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:38,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096679697] [2020-12-22 10:32:38,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118924504] [2020-12-22 10:32:38,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:38,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:32:38,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:38,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:32:38,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:38,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:38,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:32:38,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491331330] [2020-12-22 10:32:38,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:32:38,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:38,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:32:38,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:32:38,783 INFO L87 Difference]: Start difference. First operand 208 states and 578 transitions. Second operand 19 states. [2020-12-22 10:32:39,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:39,833 INFO L93 Difference]: Finished difference Result 316 states and 802 transitions. [2020-12-22 10:32:39,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 10:32:39,835 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:32:39,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:39,836 INFO L225 Difference]: With dead ends: 316 [2020-12-22 10:32:39,836 INFO L226 Difference]: Without dead ends: 314 [2020-12-22 10:32:39,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=333, Invalid=789, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 10:32:39,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-12-22 10:32:39,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 211. [2020-12-22 10:32:39,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-12-22 10:32:39,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 587 transitions. [2020-12-22 10:32:39,840 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 587 transitions. Word has length 15 [2020-12-22 10:32:39,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:39,841 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 587 transitions. [2020-12-22 10:32:39,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:32:39,841 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 587 transitions. [2020-12-22 10:32:39,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:39,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:39,841 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:40,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-12-22 10:32:40,042 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:40,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:40,043 INFO L82 PathProgramCache]: Analyzing trace with hash 961568369, now seen corresponding path program 153 times [2020-12-22 10:32:40,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:40,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821522060] [2020-12-22 10:32:40,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:40,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821522060] [2020-12-22 10:32:40,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251550207] [2020-12-22 10:32:40,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:40,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:32:40,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:40,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:32:40,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:40,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:40,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:32:40,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609536349] [2020-12-22 10:32:40,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:32:40,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:40,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:32:40,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:32:40,768 INFO L87 Difference]: Start difference. First operand 211 states and 587 transitions. Second operand 19 states. [2020-12-22 10:32:41,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:41,963 INFO L93 Difference]: Finished difference Result 335 states and 842 transitions. [2020-12-22 10:32:41,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:32:41,965 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:32:41,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:41,966 INFO L225 Difference]: With dead ends: 335 [2020-12-22 10:32:41,966 INFO L226 Difference]: Without dead ends: 333 [2020-12-22 10:32:41,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=368, Invalid=892, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 10:32:41,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-12-22 10:32:41,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 212. [2020-12-22 10:32:41,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-12-22 10:32:41,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 590 transitions. [2020-12-22 10:32:41,970 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 590 transitions. Word has length 15 [2020-12-22 10:32:41,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:41,970 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 590 transitions. [2020-12-22 10:32:41,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:32:41,970 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 590 transitions. [2020-12-22 10:32:41,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:41,971 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:41,971 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:42,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-12-22 10:32:42,171 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:42,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:42,172 INFO L82 PathProgramCache]: Analyzing trace with hash 964246676, now seen corresponding path program 154 times [2020-12-22 10:32:42,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:42,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474316180] [2020-12-22 10:32:42,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:42,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:42,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474316180] [2020-12-22 10:32:42,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203100739] [2020-12-22 10:32:42,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:42,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:32:42,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:42,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:32:42,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:42,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:42,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:32:42,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439066865] [2020-12-22 10:32:42,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:32:42,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:42,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:32:42,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:32:42,816 INFO L87 Difference]: Start difference. First operand 212 states and 590 transitions. Second operand 19 states. [2020-12-22 10:32:43,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:43,799 INFO L93 Difference]: Finished difference Result 317 states and 807 transitions. [2020-12-22 10:32:43,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:32:43,801 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:32:43,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:43,802 INFO L225 Difference]: With dead ends: 317 [2020-12-22 10:32:43,802 INFO L226 Difference]: Without dead ends: 315 [2020-12-22 10:32:43,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 10:32:43,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-12-22 10:32:43,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 214. [2020-12-22 10:32:43,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-12-22 10:32:43,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 596 transitions. [2020-12-22 10:32:43,805 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 596 transitions. Word has length 15 [2020-12-22 10:32:43,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:43,806 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 596 transitions. [2020-12-22 10:32:43,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:32:43,806 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 596 transitions. [2020-12-22 10:32:43,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:43,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:43,806 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:44,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:44,007 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:44,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:44,007 INFO L82 PathProgramCache]: Analyzing trace with hash 964249559, now seen corresponding path program 155 times [2020-12-22 10:32:44,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:44,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756617451] [2020-12-22 10:32:44,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:44,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756617451] [2020-12-22 10:32:44,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87825372] [2020-12-22 10:32:44,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:44,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:32:44,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:44,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:32:44,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:44,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:44,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:44,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:32:44,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535052592] [2020-12-22 10:32:44,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:32:44,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:44,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:32:44,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:32:44,625 INFO L87 Difference]: Start difference. First operand 214 states and 596 transitions. Second operand 19 states. [2020-12-22 10:32:45,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:45,441 INFO L93 Difference]: Finished difference Result 312 states and 795 transitions. [2020-12-22 10:32:45,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:32:45,443 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:32:45,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:45,444 INFO L225 Difference]: With dead ends: 312 [2020-12-22 10:32:45,444 INFO L226 Difference]: Without dead ends: 310 [2020-12-22 10:32:45,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=283, Invalid=647, Unknown=0, NotChecked=0, Total=930 [2020-12-22 10:32:45,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-12-22 10:32:45,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 213. [2020-12-22 10:32:45,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-12-22 10:32:45,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 593 transitions. [2020-12-22 10:32:45,448 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 593 transitions. Word has length 15 [2020-12-22 10:32:45,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:45,448 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 593 transitions. [2020-12-22 10:32:45,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:32:45,448 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 593 transitions. [2020-12-22 10:32:45,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:45,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:45,449 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:45,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-12-22 10:32:45,651 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:45,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:45,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1047366449, now seen corresponding path program 156 times [2020-12-22 10:32:45,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:45,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423638581] [2020-12-22 10:32:45,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:45,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:45,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423638581] [2020-12-22 10:32:45,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716223512] [2020-12-22 10:32:45,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:45,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:32:45,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:45,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:32:45,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:46,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:46,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:46,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:32:46,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960771155] [2020-12-22 10:32:46,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:32:46,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:46,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:32:46,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:32:46,406 INFO L87 Difference]: Start difference. First operand 213 states and 593 transitions. Second operand 19 states. [2020-12-22 10:32:47,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:47,749 INFO L93 Difference]: Finished difference Result 322 states and 817 transitions. [2020-12-22 10:32:47,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 10:32:47,751 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:32:47,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:47,752 INFO L225 Difference]: With dead ends: 322 [2020-12-22 10:32:47,752 INFO L226 Difference]: Without dead ends: 320 [2020-12-22 10:32:47,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=378, Invalid=882, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 10:32:47,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-12-22 10:32:47,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 213. [2020-12-22 10:32:47,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-12-22 10:32:47,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 593 transitions. [2020-12-22 10:32:47,756 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 593 transitions. Word has length 15 [2020-12-22 10:32:47,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:47,756 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 593 transitions. [2020-12-22 10:32:47,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:32:47,756 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 593 transitions. [2020-12-22 10:32:47,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:47,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:47,757 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:47,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:47,957 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:47,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:47,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1047452939, now seen corresponding path program 157 times [2020-12-22 10:32:47,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:47,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146879224] [2020-12-22 10:32:47,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:48,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:48,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146879224] [2020-12-22 10:32:48,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302793071] [2020-12-22 10:32:48,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:48,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:32:48,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:48,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:48,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:32:48,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559150029] [2020-12-22 10:32:48,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:32:48,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:48,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:32:48,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:32:48,663 INFO L87 Difference]: Start difference. First operand 213 states and 593 transitions. Second operand 19 states. [2020-12-22 10:32:50,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:50,000 INFO L93 Difference]: Finished difference Result 323 states and 820 transitions. [2020-12-22 10:32:50,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:32:50,003 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:32:50,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:50,004 INFO L225 Difference]: With dead ends: 323 [2020-12-22 10:32:50,004 INFO L226 Difference]: Without dead ends: 321 [2020-12-22 10:32:50,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=348, Invalid=774, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 10:32:50,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-12-22 10:32:50,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 212. [2020-12-22 10:32:50,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-12-22 10:32:50,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 590 transitions. [2020-12-22 10:32:50,008 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 590 transitions. Word has length 15 [2020-12-22 10:32:50,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:50,008 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 590 transitions. [2020-12-22 10:32:50,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:32:50,008 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 590 transitions. [2020-12-22 10:32:50,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:50,009 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:50,009 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:50,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2020-12-22 10:32:50,209 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:50,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:50,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1050226385, now seen corresponding path program 158 times [2020-12-22 10:32:50,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:50,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741076461] [2020-12-22 10:32:50,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:50,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741076461] [2020-12-22 10:32:50,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287049113] [2020-12-22 10:32:50,480 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:50,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:32:50,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:50,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:32:50,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:50,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:50,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:32:50,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015879563] [2020-12-22 10:32:50,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:32:50,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:50,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:32:50,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:32:50,971 INFO L87 Difference]: Start difference. First operand 212 states and 590 transitions. Second operand 19 states. [2020-12-22 10:32:51,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:51,851 INFO L93 Difference]: Finished difference Result 300 states and 768 transitions. [2020-12-22 10:32:51,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:32:51,853 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:32:51,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:51,854 INFO L225 Difference]: With dead ends: 300 [2020-12-22 10:32:51,854 INFO L226 Difference]: Without dead ends: 298 [2020-12-22 10:32:51,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:32:51,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-12-22 10:32:51,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 215. [2020-12-22 10:32:51,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-12-22 10:32:51,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 591 transitions. [2020-12-22 10:32:51,858 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 591 transitions. Word has length 15 [2020-12-22 10:32:51,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:51,858 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 591 transitions. [2020-12-22 10:32:51,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:32:51,859 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 591 transitions. [2020-12-22 10:32:51,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:51,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:51,859 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:52,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:52,060 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:52,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:52,060 INFO L82 PathProgramCache]: Analyzing trace with hash 360497596, now seen corresponding path program 159 times [2020-12-22 10:32:52,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:52,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077695955] [2020-12-22 10:32:52,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:52,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077695955] [2020-12-22 10:32:52,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761738033] [2020-12-22 10:32:52,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:52,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:32:52,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:52,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:32:52,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:52,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:52,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:32:52,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396306951] [2020-12-22 10:32:52,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:32:52,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:52,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:32:52,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:32:52,789 INFO L87 Difference]: Start difference. First operand 215 states and 591 transitions. Second operand 19 states. [2020-12-22 10:32:53,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:53,835 INFO L93 Difference]: Finished difference Result 336 states and 844 transitions. [2020-12-22 10:32:53,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 10:32:53,836 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:32:53,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:53,837 INFO L225 Difference]: With dead ends: 336 [2020-12-22 10:32:53,838 INFO L226 Difference]: Without dead ends: 334 [2020-12-22 10:32:53,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2020-12-22 10:32:53,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-12-22 10:32:53,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 217. [2020-12-22 10:32:53,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-22 10:32:53,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 597 transitions. [2020-12-22 10:32:53,843 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 597 transitions. Word has length 15 [2020-12-22 10:32:53,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:53,843 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 597 transitions. [2020-12-22 10:32:53,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:32:53,844 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 597 transitions. [2020-12-22 10:32:53,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:53,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:53,844 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:54,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:54,059 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:54,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:54,059 INFO L82 PathProgramCache]: Analyzing trace with hash 360586969, now seen corresponding path program 160 times [2020-12-22 10:32:54,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:54,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638165573] [2020-12-22 10:32:54,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:54,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638165573] [2020-12-22 10:32:54,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28822149] [2020-12-22 10:32:54,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:54,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:32:54,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:54,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:32:54,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:54,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:54,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:54,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:32:54,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037317113] [2020-12-22 10:32:54,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:32:54,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:54,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:32:54,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:32:54,760 INFO L87 Difference]: Start difference. First operand 217 states and 597 transitions. Second operand 19 states. [2020-12-22 10:32:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:55,959 INFO L93 Difference]: Finished difference Result 341 states and 854 transitions. [2020-12-22 10:32:55,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 10:32:55,961 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:32:55,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:55,962 INFO L225 Difference]: With dead ends: 341 [2020-12-22 10:32:55,962 INFO L226 Difference]: Without dead ends: 339 [2020-12-22 10:32:55,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 10:32:55,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-12-22 10:32:55,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 218. [2020-12-22 10:32:55,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-12-22 10:32:55,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 600 transitions. [2020-12-22 10:32:55,966 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 600 transitions. Word has length 15 [2020-12-22 10:32:55,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:55,966 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 600 transitions. [2020-12-22 10:32:55,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:32:55,966 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 600 transitions. [2020-12-22 10:32:55,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:55,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:55,966 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:56,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:56,167 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:56,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:56,168 INFO L82 PathProgramCache]: Analyzing trace with hash 363265276, now seen corresponding path program 161 times [2020-12-22 10:32:56,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:56,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507410337] [2020-12-22 10:32:56,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:56,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507410337] [2020-12-22 10:32:56,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783961306] [2020-12-22 10:32:56,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:56,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:32:56,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:56,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:32:56,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:56,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:56,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:32:56,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245563333] [2020-12-22 10:32:56,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:32:56,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:56,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:32:56,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:32:56,855 INFO L87 Difference]: Start difference. First operand 218 states and 600 transitions. Second operand 19 states. [2020-12-22 10:32:57,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:57,908 INFO L93 Difference]: Finished difference Result 330 states and 834 transitions. [2020-12-22 10:32:57,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 10:32:57,910 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:32:57,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:57,911 INFO L225 Difference]: With dead ends: 330 [2020-12-22 10:32:57,911 INFO L226 Difference]: Without dead ends: 328 [2020-12-22 10:32:57,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=291, Invalid=765, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 10:32:57,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-12-22 10:32:57,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 220. [2020-12-22 10:32:57,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-12-22 10:32:57,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 606 transitions. [2020-12-22 10:32:57,916 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 606 transitions. Word has length 15 [2020-12-22 10:32:57,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:57,916 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 606 transitions. [2020-12-22 10:32:57,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:32:57,916 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 606 transitions. [2020-12-22 10:32:57,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:57,917 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:57,917 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:58,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:58,117 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:58,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:58,118 INFO L82 PathProgramCache]: Analyzing trace with hash 363268159, now seen corresponding path program 162 times [2020-12-22 10:32:58,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:58,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595253554] [2020-12-22 10:32:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:58,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595253554] [2020-12-22 10:32:58,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129755240] [2020-12-22 10:32:58,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:58,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:32:58,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:58,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:32:58,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:58,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:58,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:58,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:32:58,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239015386] [2020-12-22 10:32:58,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:32:58,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:58,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:32:58,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:32:58,760 INFO L87 Difference]: Start difference. First operand 220 states and 606 transitions. Second operand 19 states. [2020-12-22 10:32:59,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:59,594 INFO L93 Difference]: Finished difference Result 327 states and 828 transitions. [2020-12-22 10:32:59,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:32:59,595 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:32:59,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:59,596 INFO L225 Difference]: With dead ends: 327 [2020-12-22 10:32:59,596 INFO L226 Difference]: Without dead ends: 325 [2020-12-22 10:32:59,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=256, Invalid=674, Unknown=0, NotChecked=0, Total=930 [2020-12-22 10:32:59,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-12-22 10:32:59,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 218. [2020-12-22 10:32:59,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-12-22 10:32:59,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 600 transitions. [2020-12-22 10:32:59,600 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 600 transitions. Word has length 15 [2020-12-22 10:32:59,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:59,601 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 600 transitions. [2020-12-22 10:32:59,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:32:59,601 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 600 transitions. [2020-12-22 10:32:59,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:32:59,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:59,601 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:59,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-12-22 10:32:59,802 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:59,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:59,802 INFO L82 PathProgramCache]: Analyzing trace with hash 446385049, now seen corresponding path program 163 times [2020-12-22 10:32:59,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:59,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624915920] [2020-12-22 10:32:59,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:59,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:59,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624915920] [2020-12-22 10:32:59,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648546829] [2020-12-22 10:32:59,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:00,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:33:00,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:00,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:00,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:00,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:33:00,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12717622] [2020-12-22 10:33:00,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:33:00,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:00,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:33:00,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:33:00,470 INFO L87 Difference]: Start difference. First operand 218 states and 600 transitions. Second operand 19 states. [2020-12-22 10:33:01,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:01,773 INFO L93 Difference]: Finished difference Result 334 states and 840 transitions. [2020-12-22 10:33:01,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 10:33:01,775 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:33:01,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:01,776 INFO L225 Difference]: With dead ends: 334 [2020-12-22 10:33:01,776 INFO L226 Difference]: Without dead ends: 332 [2020-12-22 10:33:01,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 10:33:01,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-12-22 10:33:01,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 218. [2020-12-22 10:33:01,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-12-22 10:33:01,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 600 transitions. [2020-12-22 10:33:01,780 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 600 transitions. Word has length 15 [2020-12-22 10:33:01,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:01,780 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 600 transitions. [2020-12-22 10:33:01,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:33:01,781 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 600 transitions. [2020-12-22 10:33:01,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:33:01,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:01,781 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:01,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-12-22 10:33:01,982 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:01,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:01,982 INFO L82 PathProgramCache]: Analyzing trace with hash 446471539, now seen corresponding path program 164 times [2020-12-22 10:33:01,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:01,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200572869] [2020-12-22 10:33:01,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:02,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:02,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200572869] [2020-12-22 10:33:02,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884841704] [2020-12-22 10:33:02,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:02,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:33:02,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:02,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:33:02,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:02,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:02,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:33:02,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444626949] [2020-12-22 10:33:02,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:33:02,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:02,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:33:02,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:33:02,761 INFO L87 Difference]: Start difference. First operand 218 states and 600 transitions. Second operand 19 states. [2020-12-22 10:33:03,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:03,968 INFO L93 Difference]: Finished difference Result 333 states and 839 transitions. [2020-12-22 10:33:03,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 10:33:03,970 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:33:03,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:03,971 INFO L225 Difference]: With dead ends: 333 [2020-12-22 10:33:03,971 INFO L226 Difference]: Without dead ends: 331 [2020-12-22 10:33:03,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=293, Invalid=763, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 10:33:03,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-12-22 10:33:03,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 217. [2020-12-22 10:33:03,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-22 10:33:03,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 597 transitions. [2020-12-22 10:33:03,975 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 597 transitions. Word has length 15 [2020-12-22 10:33:03,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:03,975 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 597 transitions. [2020-12-22 10:33:03,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:33:03,975 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 597 transitions. [2020-12-22 10:33:03,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:33:03,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:03,975 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:04,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-12-22 10:33:04,178 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:04,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:04,179 INFO L82 PathProgramCache]: Analyzing trace with hash 449244985, now seen corresponding path program 165 times [2020-12-22 10:33:04,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:04,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185926670] [2020-12-22 10:33:04,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:04,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185926670] [2020-12-22 10:33:04,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280430029] [2020-12-22 10:33:04,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:04,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 10:33:04,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:04,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:33:04,482 INFO L286 TraceCheckSpWp]: Computing forward predicates...