/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy CAMEL_NO_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 21:45:56,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:45:56,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:45:56,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:45:56,110 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:45:56,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:45:56,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:45:56,127 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:45:56,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:45:56,131 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:45:56,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:45:56,133 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:45:56,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:45:56,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:45:56,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:45:56,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:45:56,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:45:56,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:45:56,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:45:56,141 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:45:56,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:45:56,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:45:56,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:45:56,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:45:56,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 21:45:56,151 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-19 21:45:56,151 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-19 21:45:56,152 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-19 21:45:56,153 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-19 21:45:56,154 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-19 21:45:56,154 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-19 21:45:56,155 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-19 21:45:56,155 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-19 21:45:56,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:45:56,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:45:56,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:45:56,158 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-19 21:45:56,172 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:45:56,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:45:56,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:45:56,174 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:45:56,174 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:45:56,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:45:56,174 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:45:56,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:45:56,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:45:56,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:45:56,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:45:56,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:45:56,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:45:56,175 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:45:56,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:45:56,176 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:45:56,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:45:56,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:45:56,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:45:56,177 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:45:56,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:45:56,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:45:56,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:45:56,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:45:56,178 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:45:56,178 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:45:56,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:45:56,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:45:56,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:45:56,179 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:45:56,461 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:45:56,478 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:45:56,481 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:45:56,483 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:45:56,484 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:45:56,484 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2020-07-19 21:45:56,558 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c88ca64ae/2d4c106c99c9453797fdd554a9620cf7/FLAG947570eb1 [2020-07-19 21:45:57,045 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:45:57,046 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i [2020-07-19 21:45:57,052 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c88ca64ae/2d4c106c99c9453797fdd554a9620cf7/FLAG947570eb1 [2020-07-19 21:45:57,365 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c88ca64ae/2d4c106c99c9453797fdd554a9620cf7 [2020-07-19 21:45:57,375 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:45:57,378 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:45:57,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:45:57,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:45:57,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:45:57,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:45:57" (1/1) ... [2020-07-19 21:45:57,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72b6db34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:57, skipping insertion in model container [2020-07-19 21:45:57,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:45:57" (1/1) ... [2020-07-19 21:45:57,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:45:57,416 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:45:57,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:45:57,609 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:45:57,632 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:45:57,650 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:45:57,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:57 WrapperNode [2020-07-19 21:45:57,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:45:57,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:45:57,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:45:57,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:45:57,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:57" (1/1) ... [2020-07-19 21:45:57,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:57" (1/1) ... [2020-07-19 21:45:57,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:57" (1/1) ... [2020-07-19 21:45:57,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:57" (1/1) ... [2020-07-19 21:45:57,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:57" (1/1) ... [2020-07-19 21:45:57,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:57" (1/1) ... [2020-07-19 21:45:57,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:57" (1/1) ... [2020-07-19 21:45:57,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:45:57,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:45:57,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:45:57,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:45:57,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:57" (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 [2020-07-19 21:45:57,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:45:57,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:45:57,842 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-19 21:45:57,842 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 21:45:57,842 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:45:57,842 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:45:57,842 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-19 21:45:57,842 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-19 21:45:57,842 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 21:45:57,842 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-19 21:45:57,843 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:45:57,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-19 21:45:57,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-19 21:45:57,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-19 21:45:57,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-19 21:45:57,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:45:57,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:45:58,202 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:45:58,202 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-07-19 21:45:58,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:45:58 BoogieIcfgContainer [2020-07-19 21:45:58,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:45:58,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:45:58,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:45:58,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:45:58,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:45:57" (1/3) ... [2020-07-19 21:45:58,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@431e07bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:45:58, skipping insertion in model container [2020-07-19 21:45:58,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:57" (2/3) ... [2020-07-19 21:45:58,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@431e07bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:45:58, skipping insertion in model container [2020-07-19 21:45:58,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:45:58" (3/3) ... [2020-07-19 21:45:58,215 INFO L109 eAbstractionObserver]: Analyzing ICFG string-1.i [2020-07-19 21:45:58,225 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:45:58,232 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:45:58,245 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:45:58,268 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:45:58,268 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:45:58,268 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:45:58,269 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:45:58,269 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:45:58,269 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:45:58,269 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:45:58,269 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:45:58,289 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-19 21:45:58,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-19 21:45:58,296 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:58,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:58,298 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:58,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:58,304 INFO L82 PathProgramCache]: Analyzing trace with hash -522531256, now seen corresponding path program 1 times [2020-07-19 21:45:58,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:58,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034043739] [2020-07-19 21:45:58,315 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a [2020-07-19 21:45:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:58,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:45:58,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034043739] [2020-07-19 21:45:58,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:45:58,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 21:45:58,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313231592] [2020-07-19 21:45:58,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 21:45:58,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:58,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 21:45:58,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 21:45:58,598 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 4 states. [2020-07-19 21:45:58,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:58,823 INFO L93 Difference]: Finished difference Result 73 states and 109 transitions. [2020-07-19 21:45:58,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 21:45:58,826 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-19 21:45:58,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:58,841 INFO L225 Difference]: With dead ends: 73 [2020-07-19 21:45:58,841 INFO L226 Difference]: Without dead ends: 36 [2020-07-19 21:45:58,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 21:45:58,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-19 21:45:58,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2020-07-19 21:45:58,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-19 21:45:58,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-07-19 21:45:58,903 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 22 [2020-07-19 21:45:58,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:58,904 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-07-19 21:45:58,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 21:45:58,904 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-07-19 21:45:58,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-19 21:45:58,909 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:58,909 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:58,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 21:45:58,910 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:58,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:58,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1816798436, now seen corresponding path program 1 times [2020-07-19 21:45:58,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:58,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179034455] [2020-07-19 21:45:58,911 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a [2020-07-19 21:45:58,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:59,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 21:45:59,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179034455] [2020-07-19 21:45:59,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261172205] [2020-07-19 21:45:59,006 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a 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 [2020-07-19 21:45:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:59,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-19 21:45:59,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 21:45:59,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:59,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-07-19 21:45:59,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010773885] [2020-07-19 21:45:59,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 21:45:59,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:59,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 21:45:59,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:45:59,114 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2020-07-19 21:45:59,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:59,240 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2020-07-19 21:45:59,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 21:45:59,240 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-07-19 21:45:59,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:59,242 INFO L225 Difference]: With dead ends: 65 [2020-07-19 21:45:59,242 INFO L226 Difference]: Without dead ends: 44 [2020-07-19 21:45:59,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:45:59,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-19 21:45:59,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-07-19 21:45:59,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-19 21:45:59,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-07-19 21:45:59,252 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 28 [2020-07-19 21:45:59,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:59,253 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-07-19 21:45:59,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 21:45:59,253 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-07-19 21:45:59,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-19 21:45:59,254 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:59,255 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:59,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-19 21:45:59,470 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:59,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:59,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1067646812, now seen corresponding path program 2 times [2020-07-19 21:45:59,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:59,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298168581] [2020-07-19 21:45:59,472 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a [2020-07-19 21:45:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:45:59,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298168581] [2020-07-19 21:45:59,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228227587] [2020-07-19 21:45:59,585 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a 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 [2020-07-19 21:45:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:59,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-19 21:45:59,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:59,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:45:59,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:59,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-07-19 21:45:59,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951802181] [2020-07-19 21:45:59,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 21:45:59,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:59,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 21:45:59,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:45:59,661 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 7 states. [2020-07-19 21:45:59,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:59,821 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2020-07-19 21:45:59,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 21:45:59,821 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-07-19 21:45:59,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:59,822 INFO L225 Difference]: With dead ends: 75 [2020-07-19 21:45:59,823 INFO L226 Difference]: Without dead ends: 52 [2020-07-19 21:45:59,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:45:59,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-19 21:45:59,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2020-07-19 21:45:59,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-19 21:45:59,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-07-19 21:45:59,837 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 32 [2020-07-19 21:45:59,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:59,837 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-07-19 21:45:59,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 21:45:59,837 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-07-19 21:45:59,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-19 21:45:59,839 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:59,839 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:00,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:00,055 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:00,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:00,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1245957476, now seen corresponding path program 3 times [2020-07-19 21:46:00,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:00,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308053432] [2020-07-19 21:46:00,058 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a [2020-07-19 21:46:00,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-19 21:46:00,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308053432] [2020-07-19 21:46:00,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003866648] [2020-07-19 21:46:00,198 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a 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 [2020-07-19 21:46:00,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:00,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-19 21:46:00,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-19 21:46:00,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:00,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-07-19 21:46:00,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202913079] [2020-07-19 21:46:00,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 21:46:00,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:00,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 21:46:00,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:46:00,270 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 8 states. [2020-07-19 21:46:00,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:00,403 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2020-07-19 21:46:00,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 21:46:00,403 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-07-19 21:46:00,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:00,404 INFO L225 Difference]: With dead ends: 85 [2020-07-19 21:46:00,405 INFO L226 Difference]: Without dead ends: 60 [2020-07-19 21:46:00,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:46:00,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-19 21:46:00,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-07-19 21:46:00,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-19 21:46:00,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-07-19 21:46:00,413 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 36 [2020-07-19 21:46:00,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:00,413 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-07-19 21:46:00,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 21:46:00,413 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-07-19 21:46:00,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-19 21:46:00,414 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:00,415 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:00,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:00,631 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:00,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:00,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1106103076, now seen corresponding path program 4 times [2020-07-19 21:46:00,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:00,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669461193] [2020-07-19 21:46:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a [2020-07-19 21:46:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-19 21:46:00,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669461193] [2020-07-19 21:46:00,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090913475] [2020-07-19 21:46:00,760 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a 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 [2020-07-19 21:46:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:00,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 21:46:00,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:00,830 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-19 21:46:00,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:00,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-07-19 21:46:00,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582543534] [2020-07-19 21:46:00,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 21:46:00,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:00,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 21:46:00,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-19 21:46:00,833 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 9 states. [2020-07-19 21:46:01,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:01,011 INFO L93 Difference]: Finished difference Result 93 states and 114 transitions. [2020-07-19 21:46:01,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 21:46:01,012 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-07-19 21:46:01,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:01,013 INFO L225 Difference]: With dead ends: 93 [2020-07-19 21:46:01,013 INFO L226 Difference]: Without dead ends: 66 [2020-07-19 21:46:01,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-19 21:46:01,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-19 21:46:01,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-07-19 21:46:01,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-19 21:46:01,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-07-19 21:46:01,029 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2020-07-19 21:46:01,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:01,029 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-07-19 21:46:01,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 21:46:01,030 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-07-19 21:46:01,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-19 21:46:01,031 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:01,031 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:01,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:01,237 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:01,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:01,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1061537308, now seen corresponding path program 5 times [2020-07-19 21:46:01,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:01,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437890147] [2020-07-19 21:46:01,239 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a [2020-07-19 21:46:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:01,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-07-19 21:46:01,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437890147] [2020-07-19 21:46:01,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:46:01,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-19 21:46:01,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135716951] [2020-07-19 21:46:01,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 21:46:01,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:01,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 21:46:01,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:46:01,423 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 8 states. [2020-07-19 21:46:01,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:01,534 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-07-19 21:46:01,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 21:46:01,534 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-07-19 21:46:01,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:01,535 INFO L225 Difference]: With dead ends: 62 [2020-07-19 21:46:01,535 INFO L226 Difference]: Without dead ends: 48 [2020-07-19 21:46:01,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:46:01,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-19 21:46:01,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-19 21:46:01,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-19 21:46:01,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-07-19 21:46:01,543 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 44 [2020-07-19 21:46:01,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:01,543 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-07-19 21:46:01,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 21:46:01,543 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-07-19 21:46:01,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-19 21:46:01,544 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:01,544 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:01,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-19 21:46:01,545 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:01,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:01,545 INFO L82 PathProgramCache]: Analyzing trace with hash -637010121, now seen corresponding path program 1 times [2020-07-19 21:46:01,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:01,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958076824] [2020-07-19 21:46:01,546 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a [2020-07-19 21:46:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:01,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:01,674 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-07-19 21:46:01,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958076824] [2020-07-19 21:46:01,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890792727] [2020-07-19 21:46:01,675 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a 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 [2020-07-19 21:46:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:01,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 21:46:01,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:01,788 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:46:01,792 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:46:01,819 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-07-19 21:46:01,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:46:01,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2020-07-19 21:46:01,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027195188] [2020-07-19 21:46:01,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 21:46:01,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:01,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 21:46:01,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-07-19 21:46:01,821 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 8 states. [2020-07-19 21:46:01,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:01,922 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-07-19 21:46:01,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 21:46:01,923 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-07-19 21:46:01,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:01,924 INFO L225 Difference]: With dead ends: 56 [2020-07-19 21:46:01,924 INFO L226 Difference]: Without dead ends: 50 [2020-07-19 21:46:01,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-19 21:46:01,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-19 21:46:01,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-07-19 21:46:01,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-19 21:46:01,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-07-19 21:46:01,932 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 46 [2020-07-19 21:46:01,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:01,932 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-07-19 21:46:01,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 21:46:01,932 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-07-19 21:46:01,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-19 21:46:01,933 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:01,933 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:02,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-19 21:46:02,145 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:02,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:02,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1604149734, now seen corresponding path program 1 times [2020-07-19 21:46:02,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:02,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639482963] [2020-07-19 21:46:02,147 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a [2020-07-19 21:46:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-19 21:46:02,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639482963] [2020-07-19 21:46:02,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:46:02,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 21:46:02,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339839414] [2020-07-19 21:46:02,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:46:02,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:02,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:46:02,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:46:02,212 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 5 states. [2020-07-19 21:46:02,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:02,269 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-07-19 21:46:02,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 21:46:02,271 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-07-19 21:46:02,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:02,272 INFO L225 Difference]: With dead ends: 67 [2020-07-19 21:46:02,272 INFO L226 Difference]: Without dead ends: 51 [2020-07-19 21:46:02,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:46:02,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-19 21:46:02,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-19 21:46:02,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-19 21:46:02,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-07-19 21:46:02,289 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 48 [2020-07-19 21:46:02,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:02,290 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-07-19 21:46:02,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:46:02,290 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-07-19 21:46:02,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-19 21:46:02,294 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:02,294 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:02,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-19 21:46:02,294 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:02,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:02,295 INFO L82 PathProgramCache]: Analyzing trace with hash 855134175, now seen corresponding path program 1 times [2020-07-19 21:46:02,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:02,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263886116] [2020-07-19 21:46:02,295 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a [2020-07-19 21:46:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:02,455 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-19 21:46:02,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263886116] [2020-07-19 21:46:02,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455526890] [2020-07-19 21:46:02,456 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a 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 [2020-07-19 21:46:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:02,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-19 21:46:02,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:02,589 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:46:02,590 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:46:02,621 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-19 21:46:02,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:02,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2020-07-19 21:46:02,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844406840] [2020-07-19 21:46:02,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 21:46:02,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:02,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 21:46:02,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-07-19 21:46:02,624 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 15 states. [2020-07-19 21:46:02,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:02,776 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2020-07-19 21:46:02,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 21:46:02,777 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-07-19 21:46:02,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:02,778 INFO L225 Difference]: With dead ends: 70 [2020-07-19 21:46:02,778 INFO L226 Difference]: Without dead ends: 53 [2020-07-19 21:46:02,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-07-19 21:46:02,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-19 21:46:02,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-07-19 21:46:02,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-19 21:46:02,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-07-19 21:46:02,786 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 50 [2020-07-19 21:46:02,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:02,786 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-07-19 21:46:02,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 21:46:02,787 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-07-19 21:46:02,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-19 21:46:02,788 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:02,788 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:02,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:02,996 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:02,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:02,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1926047290, now seen corresponding path program 2 times [2020-07-19 21:46:02,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:02,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123996800] [2020-07-19 21:46:02,998 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a [2020-07-19 21:46:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:03,103 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-19 21:46:03,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123996800] [2020-07-19 21:46:03,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587998693] [2020-07-19 21:46:03,104 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a 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 [2020-07-19 21:46:03,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:03,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 21:46:03,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:03,221 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:46:03,222 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:46:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-19 21:46:03,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:03,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2020-07-19 21:46:03,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685054395] [2020-07-19 21:46:03,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 21:46:03,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:03,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 21:46:03,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-07-19 21:46:03,259 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 16 states. [2020-07-19 21:46:03,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:03,577 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2020-07-19 21:46:03,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 21:46:03,578 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-07-19 21:46:03,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:03,579 INFO L225 Difference]: With dead ends: 62 [2020-07-19 21:46:03,579 INFO L226 Difference]: Without dead ends: 56 [2020-07-19 21:46:03,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2020-07-19 21:46:03,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-19 21:46:03,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-07-19 21:46:03,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-19 21:46:03,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-07-19 21:46:03,586 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 52 [2020-07-19 21:46:03,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:03,587 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-07-19 21:46:03,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 21:46:03,587 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-07-19 21:46:03,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-19 21:46:03,588 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:03,588 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:03,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-19 21:46:03,804 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:03,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:03,805 INFO L82 PathProgramCache]: Analyzing trace with hash 477761629, now seen corresponding path program 3 times [2020-07-19 21:46:03,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:03,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971928710] [2020-07-19 21:46:03,806 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a [2020-07-19 21:46:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-19 21:46:03,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971928710] [2020-07-19 21:46:03,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564147459] [2020-07-19 21:46:03,872 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a 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 [2020-07-19 21:46:03,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:03,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 21:46:03,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-19 21:46:03,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:03,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2020-07-19 21:46:03,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293695470] [2020-07-19 21:46:03,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 21:46:03,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:03,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 21:46:03,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:46:03,982 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 10 states. [2020-07-19 21:46:04,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:04,074 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2020-07-19 21:46:04,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 21:46:04,075 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-07-19 21:46:04,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:04,076 INFO L225 Difference]: With dead ends: 86 [2020-07-19 21:46:04,076 INFO L226 Difference]: Without dead ends: 74 [2020-07-19 21:46:04,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:46:04,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-19 21:46:04,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2020-07-19 21:46:04,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-19 21:46:04,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2020-07-19 21:46:04,084 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 54 [2020-07-19 21:46:04,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:04,085 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2020-07-19 21:46:04,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 21:46:04,085 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2020-07-19 21:46:04,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-19 21:46:04,086 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:04,086 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:04,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-07-19 21:46:04,301 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:04,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:04,301 INFO L82 PathProgramCache]: Analyzing trace with hash 945709890, now seen corresponding path program 1 times [2020-07-19 21:46:04,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:04,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126446833] [2020-07-19 21:46:04,302 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a [2020-07-19 21:46:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:04,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:04,374 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-19 21:46:04,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126446833] [2020-07-19 21:46:04,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621123408] [2020-07-19 21:46:04,375 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a 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 [2020-07-19 21:46:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:04,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-19 21:46:04,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-07-19 21:46:04,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:04,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2020-07-19 21:46:04,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514165763] [2020-07-19 21:46:04,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 21:46:04,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:04,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 21:46:04,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:46:04,472 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand 11 states. [2020-07-19 21:46:04,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:04,558 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2020-07-19 21:46:04,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 21:46:04,559 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-07-19 21:46:04,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:04,560 INFO L225 Difference]: With dead ends: 79 [2020-07-19 21:46:04,560 INFO L226 Difference]: Without dead ends: 57 [2020-07-19 21:46:04,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-07-19 21:46:04,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-19 21:46:04,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-19 21:46:04,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-19 21:46:04,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2020-07-19 21:46:04,566 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 56 [2020-07-19 21:46:04,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:04,567 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2020-07-19 21:46:04,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 21:46:04,567 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2020-07-19 21:46:04,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-19 21:46:04,568 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:04,568 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:04,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:04,781 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:04,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:04,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1888314782, now seen corresponding path program 4 times [2020-07-19 21:46:04,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:04,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349224844] [2020-07-19 21:46:04,783 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a [2020-07-19 21:46:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:04,918 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-19 21:46:04,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349224844] [2020-07-19 21:46:04,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981312151] [2020-07-19 21:46:04,919 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a 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 [2020-07-19 21:46:04,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:04,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-19 21:46:04,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:05,069 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:46:05,070 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:46:05,099 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-19 21:46:05,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:05,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2020-07-19 21:46:05,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389764052] [2020-07-19 21:46:05,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-19 21:46:05,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:05,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-19 21:46:05,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-07-19 21:46:05,101 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 18 states. [2020-07-19 21:46:05,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:05,297 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2020-07-19 21:46:05,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-19 21:46:05,297 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 56 [2020-07-19 21:46:05,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:05,298 INFO L225 Difference]: With dead ends: 80 [2020-07-19 21:46:05,298 INFO L226 Difference]: Without dead ends: 59 [2020-07-19 21:46:05,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-19 21:46:05,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-19 21:46:05,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-07-19 21:46:05,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-19 21:46:05,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2020-07-19 21:46:05,305 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 56 [2020-07-19 21:46:05,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:05,305 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2020-07-19 21:46:05,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-19 21:46:05,305 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2020-07-19 21:46:05,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-19 21:46:05,307 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:05,307 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:05,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:05,519 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:05,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:05,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1242276355, now seen corresponding path program 5 times [2020-07-19 21:46:05,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:05,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535216695] [2020-07-19 21:46:05,522 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a [2020-07-19 21:46:05,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-19 21:46:05,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535216695] [2020-07-19 21:46:05,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306848104] [2020-07-19 21:46:05,640 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a 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 [2020-07-19 21:46:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:05,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-19 21:46:05,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:05,779 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:46:05,781 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:46:05,810 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-19 21:46:05,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:05,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2020-07-19 21:46:05,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097100906] [2020-07-19 21:46:05,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-19 21:46:05,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:05,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-19 21:46:05,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-19 21:46:05,812 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 19 states. [2020-07-19 21:46:06,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:06,109 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2020-07-19 21:46:06,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 21:46:06,110 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 58 [2020-07-19 21:46:06,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:06,111 INFO L225 Difference]: With dead ends: 68 [2020-07-19 21:46:06,111 INFO L226 Difference]: Without dead ends: 62 [2020-07-19 21:46:06,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2020-07-19 21:46:06,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-19 21:46:06,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-07-19 21:46:06,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-19 21:46:06,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-07-19 21:46:06,127 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 58 [2020-07-19 21:46:06,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:06,127 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-07-19 21:46:06,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-19 21:46:06,127 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-07-19 21:46:06,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-19 21:46:06,130 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:06,130 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:06,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-19 21:46:06,343 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:06,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:06,344 INFO L82 PathProgramCache]: Analyzing trace with hash 850551648, now seen corresponding path program 6 times [2020-07-19 21:46:06,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:06,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700966698] [2020-07-19 21:46:06,345 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a [2020-07-19 21:46:06,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-07-19 21:46:06,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700966698] [2020-07-19 21:46:06,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025872047] [2020-07-19 21:46:06,432 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a 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 [2020-07-19 21:46:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:06,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 21:46:06,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:06,566 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-07-19 21:46:06,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:06,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2020-07-19 21:46:06,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041349717] [2020-07-19 21:46:06,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-19 21:46:06,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:06,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-19 21:46:06,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-07-19 21:46:06,569 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 13 states. [2020-07-19 21:46:06,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:06,698 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2020-07-19 21:46:06,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 21:46:06,699 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-07-19 21:46:06,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:06,700 INFO L225 Difference]: With dead ends: 100 [2020-07-19 21:46:06,700 INFO L226 Difference]: Without dead ends: 86 [2020-07-19 21:46:06,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-07-19 21:46:06,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-19 21:46:06,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 77. [2020-07-19 21:46:06,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-19 21:46:06,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-07-19 21:46:06,708 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 60 [2020-07-19 21:46:06,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:06,708 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-07-19 21:46:06,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-19 21:46:06,709 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-07-19 21:46:06,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-19 21:46:06,710 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:06,710 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:06,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-19 21:46:06,924 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:06,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:06,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1426761989, now seen corresponding path program 2 times [2020-07-19 21:46:06,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:06,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398099426] [2020-07-19 21:46:06,925 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a [2020-07-19 21:46:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:07,004 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-07-19 21:46:07,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398099426] [2020-07-19 21:46:07,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056277050] [2020-07-19 21:46:07,005 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a 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 [2020-07-19 21:46:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:07,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-19 21:46:07,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-07-19 21:46:07,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:07,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2020-07-19 21:46:07,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150790207] [2020-07-19 21:46:07,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-19 21:46:07,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:07,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-19 21:46:07,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-07-19 21:46:07,129 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 14 states. [2020-07-19 21:46:07,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:07,270 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2020-07-19 21:46:07,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 21:46:07,270 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-07-19 21:46:07,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:07,271 INFO L225 Difference]: With dead ends: 93 [2020-07-19 21:46:07,271 INFO L226 Difference]: Without dead ends: 63 [2020-07-19 21:46:07,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-07-19 21:46:07,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-19 21:46:07,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-07-19 21:46:07,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-19 21:46:07,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2020-07-19 21:46:07,277 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 62 [2020-07-19 21:46:07,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:07,277 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2020-07-19 21:46:07,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-19 21:46:07,278 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2020-07-19 21:46:07,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-19 21:46:07,278 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:07,279 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:07,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-19 21:46:07,490 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:07,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:07,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1340435035, now seen corresponding path program 7 times [2020-07-19 21:46:07,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:07,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780284707] [2020-07-19 21:46:07,492 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a [2020-07-19 21:46:07,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:07,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-07-19 21:46:07,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780284707] [2020-07-19 21:46:07,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595987161] [2020-07-19 21:46:07,629 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a 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 [2020-07-19 21:46:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:07,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-19 21:46:07,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:07,793 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:46:07,794 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:46:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-07-19 21:46:07,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:07,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2020-07-19 21:46:07,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671439252] [2020-07-19 21:46:07,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-19 21:46:07,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:07,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-19 21:46:07,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-07-19 21:46:07,851 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 21 states. [2020-07-19 21:46:08,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:08,074 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2020-07-19 21:46:08,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 21:46:08,074 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 62 [2020-07-19 21:46:08,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:08,075 INFO L225 Difference]: With dead ends: 90 [2020-07-19 21:46:08,076 INFO L226 Difference]: Without dead ends: 65 [2020-07-19 21:46:08,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2020-07-19 21:46:08,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-19 21:46:08,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-07-19 21:46:08,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-19 21:46:08,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-07-19 21:46:08,081 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 62 [2020-07-19 21:46:08,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:08,081 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-07-19 21:46:08,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-19 21:46:08,081 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-07-19 21:46:08,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-07-19 21:46:08,082 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:08,082 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:08,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:08,294 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:08,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:08,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1186490752, now seen corresponding path program 8 times [2020-07-19 21:46:08,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:08,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380135755] [2020-07-19 21:46:08,296 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a [2020-07-19 21:46:08,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:08,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:08,435 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-07-19 21:46:08,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380135755] [2020-07-19 21:46:08,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70888417] [2020-07-19 21:46:08,436 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a 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 [2020-07-19 21:46:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:08,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-19 21:46:08,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:08,587 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:46:08,589 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:46:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-07-19 21:46:08,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:08,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 22 [2020-07-19 21:46:08,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71098291] [2020-07-19 21:46:08,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-19 21:46:08,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:08,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-19 21:46:08,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2020-07-19 21:46:08,629 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 22 states. [2020-07-19 21:46:09,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:09,016 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2020-07-19 21:46:09,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-19 21:46:09,017 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 64 [2020-07-19 21:46:09,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:09,018 INFO L225 Difference]: With dead ends: 74 [2020-07-19 21:46:09,018 INFO L226 Difference]: Without dead ends: 68 [2020-07-19 21:46:09,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2020-07-19 21:46:09,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-19 21:46:09,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-07-19 21:46:09,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-19 21:46:09,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2020-07-19 21:46:09,024 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 64 [2020-07-19 21:46:09,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:09,025 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2020-07-19 21:46:09,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-19 21:46:09,025 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2020-07-19 21:46:09,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-19 21:46:09,026 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:09,026 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:09,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-19 21:46:09,238 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:09,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:09,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1374058717, now seen corresponding path program 9 times [2020-07-19 21:46:09,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:09,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804952058] [2020-07-19 21:46:09,239 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a [2020-07-19 21:46:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:09,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-07-19 21:46:09,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804952058] [2020-07-19 21:46:09,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313326925] [2020-07-19 21:46:09,329 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a 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 [2020-07-19 21:46:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:09,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 21:46:09,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-07-19 21:46:09,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:09,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2020-07-19 21:46:09,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395180894] [2020-07-19 21:46:09,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 21:46:09,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:09,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 21:46:09,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-07-19 21:46:09,493 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand 16 states. [2020-07-19 21:46:09,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:09,684 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2020-07-19 21:46:09,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 21:46:09,685 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 66 [2020-07-19 21:46:09,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:09,687 INFO L225 Difference]: With dead ends: 114 [2020-07-19 21:46:09,687 INFO L226 Difference]: Without dead ends: 98 [2020-07-19 21:46:09,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-07-19 21:46:09,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-19 21:46:09,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-07-19 21:46:09,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-19 21:46:09,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-07-19 21:46:09,695 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 66 [2020-07-19 21:46:09,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:09,696 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-07-19 21:46:09,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 21:46:09,696 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-07-19 21:46:09,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-19 21:46:09,698 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:09,698 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:09,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:09,914 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:09,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:09,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1776856968, now seen corresponding path program 3 times [2020-07-19 21:46:09,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:09,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060480714] [2020-07-19 21:46:09,915 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a [2020-07-19 21:46:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:10,031 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-07-19 21:46:10,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060480714] [2020-07-19 21:46:10,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608293510] [2020-07-19 21:46:10,032 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a 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 [2020-07-19 21:46:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:10,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-19 21:46:10,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-07-19 21:46:10,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:10,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2020-07-19 21:46:10,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412925010] [2020-07-19 21:46:10,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 21:46:10,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:10,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 21:46:10,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-07-19 21:46:10,236 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 16 states. [2020-07-19 21:46:10,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:10,467 INFO L93 Difference]: Finished difference Result 107 states and 125 transitions. [2020-07-19 21:46:10,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 21:46:10,467 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2020-07-19 21:46:10,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:10,468 INFO L225 Difference]: With dead ends: 107 [2020-07-19 21:46:10,468 INFO L226 Difference]: Without dead ends: 69 [2020-07-19 21:46:10,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-07-19 21:46:10,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-19 21:46:10,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-19 21:46:10,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-19 21:46:10,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2020-07-19 21:46:10,474 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 68 [2020-07-19 21:46:10,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:10,474 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2020-07-19 21:46:10,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 21:46:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2020-07-19 21:46:10,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-19 21:46:10,475 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:10,476 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:10,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:10,676 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:10,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:10,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1222495832, now seen corresponding path program 10 times [2020-07-19 21:46:10,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:10,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352653481] [2020-07-19 21:46:10,677 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a [2020-07-19 21:46:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:10,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:10,818 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-07-19 21:46:10,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352653481] [2020-07-19 21:46:10,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035170200] [2020-07-19 21:46:10,819 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a 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 [2020-07-19 21:46:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:10,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-19 21:46:10,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:11,027 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:46:11,028 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:46:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-07-19 21:46:11,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:11,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2020-07-19 21:46:11,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527594144] [2020-07-19 21:46:11,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-19 21:46:11,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:11,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-19 21:46:11,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2020-07-19 21:46:11,071 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 24 states. [2020-07-19 21:46:11,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:11,312 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2020-07-19 21:46:11,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-19 21:46:11,313 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 68 [2020-07-19 21:46:11,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:11,314 INFO L225 Difference]: With dead ends: 100 [2020-07-19 21:46:11,314 INFO L226 Difference]: Without dead ends: 71 [2020-07-19 21:46:11,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2020-07-19 21:46:11,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-19 21:46:11,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-07-19 21:46:11,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-19 21:46:11,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2020-07-19 21:46:11,319 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 68 [2020-07-19 21:46:11,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:11,320 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2020-07-19 21:46:11,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-19 21:46:11,320 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2020-07-19 21:46:11,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-07-19 21:46:11,321 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:11,321 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:11,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-19 21:46:11,525 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:11,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:11,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1314701251, now seen corresponding path program 11 times [2020-07-19 21:46:11,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:11,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587436568] [2020-07-19 21:46:11,527 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a [2020-07-19 21:46:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:11,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:11,810 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-19 21:46:11,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587436568] [2020-07-19 21:46:11,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417244370] [2020-07-19 21:46:11,811 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@76003a2a 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 [2020-07-19 21:46:11,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:11,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-19 21:46:11,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:12,045 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:46:12,046 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:46:12,098 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 30 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-07-19 21:46:12,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:12,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2020-07-19 21:46:12,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252158412] [2020-07-19 21:46:12,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-19 21:46:12,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:12,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-19 21:46:12,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2020-07-19 21:46:12,101 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 27 states. [2020-07-19 21:46:12,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:12,416 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2020-07-19 21:46:12,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 21:46:12,416 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 70 [2020-07-19 21:46:12,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:12,417 INFO L225 Difference]: With dead ends: 71 [2020-07-19 21:46:12,418 INFO L226 Difference]: Without dead ends: 0 [2020-07-19 21:46:12,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2020-07-19 21:46:12,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-19 21:46:12,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-19 21:46:12,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-19 21:46:12,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-19 21:46:12,419 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 70 [2020-07-19 21:46:12,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:12,420 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-19 21:46:12,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-19 21:46:12,420 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-19 21:46:12,420 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-19 21:46:12,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:12,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-19 21:46:13,383 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 45 [2020-07-19 21:46:13,539 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2020-07-19 21:46:13,811 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2020-07-19 21:46:13,816 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-19 21:46:13,816 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2020-07-19 21:46:13,816 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-19 21:46:13,816 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-19 21:46:13,817 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-19 21:46:13,817 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-19 21:46:13,817 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-19 21:46:13,817 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-07-19 21:46:13,817 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-19 21:46:13,817 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-07-19 21:46:13,817 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-07-19 21:46:13,817 INFO L264 CegarLoopResult]: At program point L35-3(lines 35 36) the Hoare annotation is: (let ((.cse0 (select |#memory_int| |main_~#string_B~0.base|))) (let ((.cse3 (= 0 (select .cse0 (+ |main_~#string_B~0.offset| 4)))) (.cse1 (= 0 |main_~#string_B~0.offset|)) (.cse2 (= 0 main_~found~0))) (or (and (= 0 (select .cse0 (+ |main_~#string_B~0.offset| main_~nc_B~0))) (= 4 main_~nc_B~0) .cse1 .cse2) (and (<= 0 main_~nc_B~0) (<= main_~nc_A~0 3) .cse2) (and .cse3 (= main_~nc_B~0 (+ |main_~#string_B~0.offset| 3)) .cse1 .cse2) (and (= 0 main_~nc_B~0) .cse3 .cse1 .cse2) (and .cse3 .cse1 (<= 2 main_~nc_B~0) (<= main_~nc_B~0 2) .cse2) (and .cse3 (<= 1 main_~nc_B~0) (<= main_~nc_B~0 1) .cse1 .cse2)))) [2020-07-19 21:46:13,817 INFO L268 CegarLoopResult]: For program point L35-4(lines 18 61) no Hoare annotation was computed. [2020-07-19 21:46:13,818 INFO L268 CegarLoopResult]: For program point L31-1(lines 31 32) no Hoare annotation was computed. [2020-07-19 21:46:13,818 INFO L264 CegarLoopResult]: At program point L31-3(lines 31 32) the Hoare annotation is: (and (= 0 (select (select |#memory_int| |main_~#string_B~0.base|) (+ |main_~#string_B~0.offset| 4))) (= 0 |main_~#string_B~0.offset|) (= 0 main_~found~0)) [2020-07-19 21:46:13,818 INFO L268 CegarLoopResult]: For program point L31-4(lines 31 32) no Hoare annotation was computed. [2020-07-19 21:46:13,818 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 61) no Hoare annotation was computed. [2020-07-19 21:46:13,818 INFO L268 CegarLoopResult]: For program point L44(lines 44 53) no Hoare annotation was computed. [2020-07-19 21:46:13,819 INFO L264 CegarLoopResult]: At program point L44-2(lines 42 54) the Hoare annotation is: (let ((.cse8 (= 0 main_~i~0)) (.cse9 (<= 1 main_~nc_B~0)) (.cse5 (<= 0 main_~j~0)) (.cse0 (<= main_~j~0 1)) (.cse6 (<= 2 main_~nc_B~0)) (.cse10 (<= main_~j~0 0)) (.cse4 (<= 1 main_~i~0)) (.cse7 (<= 3 main_~nc_B~0)) (.cse1 (<= 4 main_~nc_B~0)) (.cse2 (<= main_~nc_A~0 3)) (.cse3 (= 0 main_~found~0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse5 (<= main_~nc_B~0 2) .cse6 .cse3) (and (<= main_~nc_B~0 4) .cse5 .cse3 .cse7) (and (= main_~i~0 main_~j~0) .cse2 .cse8 .cse3 .cse7) (and .cse9 .cse8 (= 0 main_~nc_A~0) .cse10 .cse3) (and .cse9 (<= main_~nc_B~0 1) .cse5 .cse3) (and (<= main_~j~0 3) .cse1 (<= 3 main_~i~0) .cse2 .cse3) (and (= 0 main_~nc_B~0) .cse5) (and .cse0 (<= main_~nc_A~0 1) .cse6 .cse3 .cse4) (and (<= main_~nc_A~0 2) .cse10 .cse3 .cse4 .cse7) (and (<= 2 main_~i~0) .cse1 .cse2 .cse3 (<= main_~j~0 2)))) [2020-07-19 21:46:13,819 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-07-19 21:46:13,819 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-07-19 21:46:13,819 INFO L264 CegarLoopResult]: At program point L58(line 58) the Hoare annotation is: (let ((.cse3 (<= 2 main_~nc_B~0)) (.cse0 (= 0 main_~found~0)) (.cse2 (<= 3 main_~nc_B~0)) (.cse1 (= 1 main_~found~0)) (.cse4 (<= 1 main_~nc_B~0))) (or (and (<= main_~j~0 3) (<= 4 main_~nc_B~0) .cse0) (and .cse1 (<= main_~nc_B~0 3) (<= 3 main_~j~0) .cse2) (and .cse1 (<= 2 main_~j~0) .cse3 (<= main_~nc_B~0 2)) (and (<= main_~j~0 1) .cse3 .cse0) (and .cse1 (= 0 main_~nc_B~0) (<= 0 main_~j~0)) (and .cse4 (<= main_~j~0 0) .cse0) (and (<= main_~j~0 2) .cse0 .cse2) (and .cse1 (<= main_~nc_B~0 4) (<= 4 main_~j~0) .cse2) (and .cse1 (<= 1 main_~j~0) .cse4 (<= main_~nc_B~0 1)))) [2020-07-19 21:46:13,819 INFO L268 CegarLoopResult]: For program point L58-1(line 58) no Hoare annotation was computed. [2020-07-19 21:46:13,819 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 17 61) no Hoare annotation was computed. [2020-07-19 21:46:13,819 INFO L268 CegarLoopResult]: For program point L42-2(lines 42 54) no Hoare annotation was computed. [2020-07-19 21:46:13,820 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 17 61) the Hoare annotation is: (= |#valid| |old(#valid)|) [2020-07-19 21:46:13,820 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 27) no Hoare annotation was computed. [2020-07-19 21:46:13,820 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 27) the Hoare annotation is: (and (= 0 |main_~#string_B~0.offset|) (= 0 main_~found~0)) [2020-07-19 21:46:13,820 INFO L268 CegarLoopResult]: For program point L26-4(lines 26 27) no Hoare annotation was computed. [2020-07-19 21:46:13,820 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 23) no Hoare annotation was computed. [2020-07-19 21:46:13,820 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 23) the Hoare annotation is: (and (= 0 |main_~#string_B~0.offset|) (= 0 main_~found~0)) [2020-07-19 21:46:13,820 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 23) no Hoare annotation was computed. [2020-07-19 21:46:13,820 INFO L268 CegarLoopResult]: For program point L35-1(lines 35 36) no Hoare annotation was computed. [2020-07-19 21:46:13,821 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 7 12) the Hoare annotation is: true [2020-07-19 21:46:13,821 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 7 12) no Hoare annotation was computed. [2020-07-19 21:46:13,821 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-07-19 21:46:13,821 INFO L268 CegarLoopResult]: For program point L8(lines 8 10) no Hoare annotation was computed. [2020-07-19 21:46:13,821 INFO L268 CegarLoopResult]: For program point L8-2(lines 7 12) no Hoare annotation was computed. [2020-07-19 21:46:13,821 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2020-07-19 21:46:13,831 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-19 21:46:13,836 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-19 21:46:13,843 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-19 21:46:13,844 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-19 21:46:13,844 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-19 21:46:13,844 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-19 21:46:13,845 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-19 21:46:13,846 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-19 21:46:13,846 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-19 21:46:13,846 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-19 21:46:13,847 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-19 21:46:13,847 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-19 21:46:13,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:46:13 BoogieIcfgContainer [2020-07-19 21:46:13,849 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 21:46:13,851 INFO L168 Benchmark]: Toolchain (without parser) took 16474.40 ms. Allocated memory was 137.9 MB in the beginning and 357.0 MB in the end (delta: 219.2 MB). Free memory was 101.7 MB in the beginning and 134.4 MB in the end (delta: -32.6 MB). Peak memory consumption was 209.2 MB. Max. memory is 7.1 GB. [2020-07-19 21:46:13,851 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 137.9 MB. Free memory is still 119.3 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-19 21:46:13,852 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.91 ms. Allocated memory is still 137.9 MB. Free memory was 101.3 MB in the beginning and 90.7 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-07-19 21:46:13,853 INFO L168 Benchmark]: Boogie Preprocessor took 123.57 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 90.7 MB in the beginning and 179.9 MB in the end (delta: -89.2 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-19 21:46:13,853 INFO L168 Benchmark]: RCFGBuilder took 430.84 ms. Allocated memory is still 202.4 MB. Free memory was 179.9 MB in the beginning and 160.7 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. [2020-07-19 21:46:13,854 INFO L168 Benchmark]: TraceAbstraction took 15641.43 ms. Allocated memory was 202.4 MB in the beginning and 357.0 MB in the end (delta: 154.7 MB). Free memory was 159.7 MB in the beginning and 134.4 MB in the end (delta: 25.3 MB). Peak memory consumption was 202.7 MB. Max. memory is 7.1 GB. [2020-07-19 21:46:13,856 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 137.9 MB. Free memory is still 119.3 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 271.91 ms. Allocated memory is still 137.9 MB. Free memory was 101.3 MB in the beginning and 90.7 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.57 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 90.7 MB in the beginning and 179.9 MB in the end (delta: -89.2 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 430.84 ms. Allocated memory is still 202.4 MB. Free memory was 179.9 MB in the beginning and 160.7 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15641.43 ms. Allocated memory was 202.4 MB in the beginning and 357.0 MB in the end (delta: 154.7 MB). Free memory was 159.7 MB in the beginning and 134.4 MB in the end (delta: 25.3 MB). Peak memory consumption was 202.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 31]: Loop Invariant [2020-07-19 21:46:13,862 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-19 21:46:13,863 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: (0 == unknown-#memory_int-unknown[string_B][string_B + 4] && 0 == string_B) && 0 == found - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 0 == string_B && 0 == found - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: 0 == string_B && 0 == found - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: (((((((((((((j <= 1 && 4 <= nc_B) && nc_A <= 3) && 0 == found) && 1 <= i) || (((0 <= j && nc_B <= 2) && 2 <= nc_B) && 0 == found)) || (((nc_B <= 4 && 0 <= j) && 0 == found) && 3 <= nc_B)) || ((((i == j && nc_A <= 3) && 0 == i) && 0 == found) && 3 <= nc_B)) || ((((1 <= nc_B && 0 == i) && 0 == nc_A) && j <= 0) && 0 == found)) || (((1 <= nc_B && nc_B <= 1) && 0 <= j) && 0 == found)) || ((((j <= 3 && 4 <= nc_B) && 3 <= i) && nc_A <= 3) && 0 == found)) || (0 == nc_B && 0 <= j)) || ((((j <= 1 && nc_A <= 1) && 2 <= nc_B) && 0 == found) && 1 <= i)) || ((((nc_A <= 2 && j <= 0) && 0 == found) && 1 <= i) && 3 <= nc_B)) || ((((2 <= i && 4 <= nc_B) && nc_A <= 3) && 0 == found) && j <= 2) - InvariantResult [Line: 35]: Loop Invariant [2020-07-19 21:46:13,865 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-19 21:46:13,866 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-19 21:46:13,866 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-19 21:46:13,866 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-19 21:46:13,866 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-19 21:46:13,867 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-19 21:46:13,868 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-19 21:46:13,868 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-19 21:46:13,868 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-19 21:46:13,868 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: (((((((0 == unknown-#memory_int-unknown[string_B][string_B + nc_B] && 4 == nc_B) && 0 == string_B) && 0 == found) || ((0 <= nc_B && nc_A <= 3) && 0 == found)) || (((0 == unknown-#memory_int-unknown[string_B][string_B + 4] && nc_B == string_B + 3) && 0 == string_B) && 0 == found)) || (((0 == nc_B && 0 == unknown-#memory_int-unknown[string_B][string_B + 4]) && 0 == string_B) && 0 == found)) || ((((0 == unknown-#memory_int-unknown[string_B][string_B + 4] && 0 == string_B) && 2 <= nc_B) && nc_B <= 2) && 0 == found)) || ((((0 == unknown-#memory_int-unknown[string_B][string_B + 4] && 1 <= nc_B) && nc_B <= 1) && 0 == string_B) && 0 == found) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.3s, OverallIterations: 22, TraceHistogramMax: 6, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 518 SDtfs, 448 SDslu, 2279 SDs, 0 SdLazy, 3026 SolverSat, 333 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1311 GetRequests, 987 SyntacticMatches, 1 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 22 MinimizatonAttempts, 99 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 37 PreInvPairs, 112 NumberOfFragments, 422 HoareAnnotationTreeSize, 37 FomulaSimplifications, 2327 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 11 FomulaSimplificationsInter, 956 FormulaSimplificationTreeSizeReductionInter, 0.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 2170 NumberOfCodeBlocks, 2170 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 2129 ConstructedInterpolants, 0 QuantifiedInterpolants, 255242 SizeOfPredicates, 55 NumberOfNonLiveVariables, 3537 ConjunctsInSsa, 171 ConjunctsInUnsatCore, 41 InterpolantComputations, 4 PerfectInterpolantSequences, 2269/2613 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...