/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init2_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:27:38,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:27:38,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:27:38,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:27:38,081 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:27:38,083 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:27:38,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:27:38,095 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:27:38,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:27:38,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:27:38,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:27:38,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:27:38,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:27:38,108 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:27:38,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:27:38,112 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:27:38,114 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:27:38,115 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:27:38,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:27:38,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:27:38,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:27:38,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:27:38,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:27:38,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:27:38,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 20:27:38,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 20:27:38,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 20:27:38,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 20:27:38,142 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 20:27:38,143 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 20:27:38,143 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:27:38,145 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:27:38,146 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:27:38,147 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:27:38,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:27:38,148 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:27:38,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:27:38,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:27:38,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:27:38,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:27:38,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:27:38,152 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 [2019-11-23 20:27:38,185 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:27:38,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:27:38,189 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:27:38,189 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:27:38,189 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:27:38,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:27:38,190 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:27:38,190 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:27:38,190 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:27:38,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:27:38,190 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:27:38,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:27:38,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:27:38,191 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:27:38,191 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:27:38,191 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:27:38,192 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:27:38,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:27:38,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:27:38,192 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:27:38,192 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:27:38,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:27:38,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:27:38,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:27:38,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:27:38,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:27:38,194 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:27:38,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:27:38,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:27:38,194 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:27:38,480 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:27:38,498 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:27:38,502 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:27:38,503 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:27:38,504 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:27:38,505 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init2_ground-1.i [2019-11-23 20:27:38,584 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfd8c9273/4fc1a6517c5342a3bbbb92a0921f2463/FLAGb9ee8b410 [2019-11-23 20:27:39,031 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:27:39,032 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init2_ground-1.i [2019-11-23 20:27:39,038 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfd8c9273/4fc1a6517c5342a3bbbb92a0921f2463/FLAGb9ee8b410 [2019-11-23 20:27:39,398 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfd8c9273/4fc1a6517c5342a3bbbb92a0921f2463 [2019-11-23 20:27:39,407 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:27:39,409 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:27:39,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:27:39,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:27:39,416 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:27:39,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:27:39" (1/1) ... [2019-11-23 20:27:39,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ed87681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:39, skipping insertion in model container [2019-11-23 20:27:39,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:27:39" (1/1) ... [2019-11-23 20:27:39,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:27:39,442 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:27:39,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:27:39,646 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:27:39,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:27:39,683 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:27:39,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:39 WrapperNode [2019-11-23 20:27:39,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:27:39,685 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:27:39,685 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:27:39,685 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:27:39,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:39" (1/1) ... [2019-11-23 20:27:39,780 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:39" (1/1) ... [2019-11-23 20:27:39,797 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:27:39,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:27:39,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:27:39,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:27:39,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:39" (1/1) ... [2019-11-23 20:27:39,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:39" (1/1) ... [2019-11-23 20:27:39,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:39" (1/1) ... [2019-11-23 20:27:39,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:39" (1/1) ... [2019-11-23 20:27:39,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:39" (1/1) ... [2019-11-23 20:27:39,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:39" (1/1) ... [2019-11-23 20:27:39,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:39" (1/1) ... [2019-11-23 20:27:39,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:27:39,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:27:39,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:27:39,823 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:27:39,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:39" (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 [2019-11-23 20:27:39,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:27:39,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:27:39,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:27:39,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:27:39,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:27:39,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:27:40,088 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:27:40,088 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:27:40,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:27:40 BoogieIcfgContainer [2019-11-23 20:27:40,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:27:40,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:27:40,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:27:40,096 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:27:40,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:27:39" (1/3) ... [2019-11-23 20:27:40,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e5a2526 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:27:40, skipping insertion in model container [2019-11-23 20:27:40,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:39" (2/3) ... [2019-11-23 20:27:40,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e5a2526 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:27:40, skipping insertion in model container [2019-11-23 20:27:40,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:27:40" (3/3) ... [2019-11-23 20:27:40,100 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init2_ground-1.i [2019-11-23 20:27:40,112 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:27:40,121 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:27:40,136 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:27:40,191 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:27:40,192 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:27:40,192 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:27:40,192 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:27:40,192 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:27:40,193 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:27:40,194 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:27:40,194 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:27:40,211 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-23 20:27:40,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:27:40,220 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:40,221 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:40,221 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:40,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:40,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1157636873, now seen corresponding path program 1 times [2019-11-23 20:27:40,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:40,235 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857824067] [2019-11-23 20:27:40,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:40,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:40,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857824067] [2019-11-23 20:27:40,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:27:40,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:27:40,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685721543] [2019-11-23 20:27:40,385 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:27:40,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:40,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:27:40,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:27:40,404 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 3 states. [2019-11-23 20:27:40,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:40,448 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2019-11-23 20:27:40,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:27:40,451 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 20:27:40,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:40,460 INFO L225 Difference]: With dead ends: 31 [2019-11-23 20:27:40,460 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 20:27:40,463 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:27:40,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 20:27:40,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-23 20:27:40,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 20:27:40,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-11-23 20:27:40,494 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2019-11-23 20:27:40,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:40,495 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-11-23 20:27:40,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:27:40,495 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-11-23 20:27:40,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:27:40,496 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:40,496 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:40,496 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:40,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:40,497 INFO L82 PathProgramCache]: Analyzing trace with hash 970257334, now seen corresponding path program 1 times [2019-11-23 20:27:40,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:40,498 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187688544] [2019-11-23 20:27:40,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:40,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:27:40,557 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187688544] [2019-11-23 20:27:40,557 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126502554] [2019-11-23 20:27:40,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:40,610 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:27:40,615 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:40,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:27:40,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:40,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:27:40,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238986300] [2019-11-23 20:27:40,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:27:40,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:40,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:27:40,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:27:40,657 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2019-11-23 20:27:40,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:40,693 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2019-11-23 20:27:40,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:27:40,694 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-23 20:27:40,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:40,695 INFO L225 Difference]: With dead ends: 26 [2019-11-23 20:27:40,695 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 20:27:40,697 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:27:40,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 20:27:40,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-23 20:27:40,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 20:27:40,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-23 20:27:40,702 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2019-11-23 20:27:40,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:40,702 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-23 20:27:40,702 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:27:40,703 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-23 20:27:40,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 20:27:40,703 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:40,703 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:40,907 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:40,907 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:40,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:40,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1117998999, now seen corresponding path program 2 times [2019-11-23 20:27:40,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:40,910 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640535140] [2019-11-23 20:27:40,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:40,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:41,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:27:41,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640535140] [2019-11-23 20:27:41,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749119066] [2019-11-23 20:27:41,006 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:41,072 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:27:41,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:41,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:27:41,077 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:41,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:27:41,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:41,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:27:41,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327721374] [2019-11-23 20:27:41,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:27:41,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:41,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:27:41,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:27:41,100 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2019-11-23 20:27:41,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:41,156 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2019-11-23 20:27:41,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:27:41,158 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-23 20:27:41,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:41,159 INFO L225 Difference]: With dead ends: 29 [2019-11-23 20:27:41,159 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 20:27:41,160 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:27:41,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 20:27:41,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-23 20:27:41,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 20:27:41,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-11-23 20:27:41,168 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2019-11-23 20:27:41,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:41,168 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-11-23 20:27:41,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:27:41,169 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-11-23 20:27:41,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:27:41,170 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:41,170 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:41,373 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:41,373 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:41,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:41,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1025156458, now seen corresponding path program 3 times [2019-11-23 20:27:41,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:41,375 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59117323] [2019-11-23 20:27:41,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:41,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:41,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:27:41,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59117323] [2019-11-23 20:27:41,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426290594] [2019-11-23 20:27:41,470 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:41,520 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:27:41,520 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:41,521 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:27:41,522 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:27:41,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:41,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:27:41,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328501307] [2019-11-23 20:27:41,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:27:41,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:41,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:27:41,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:27:41,538 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 7 states. [2019-11-23 20:27:41,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:41,586 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2019-11-23 20:27:41,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:27:41,587 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-11-23 20:27:41,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:41,588 INFO L225 Difference]: With dead ends: 32 [2019-11-23 20:27:41,588 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 20:27:41,589 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:27:41,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 20:27:41,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-23 20:27:41,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:27:41,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-23 20:27:41,594 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2019-11-23 20:27:41,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:41,595 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-23 20:27:41,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:27:41,595 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-23 20:27:41,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:27:41,596 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:41,596 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:41,800 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:41,801 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:41,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:41,801 INFO L82 PathProgramCache]: Analyzing trace with hash -57021897, now seen corresponding path program 4 times [2019-11-23 20:27:41,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:41,802 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722234260] [2019-11-23 20:27:41,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:41,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:27:41,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722234260] [2019-11-23 20:27:41,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815328875] [2019-11-23 20:27:41,921 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:41,965 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:27:41,966 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:41,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:27:41,968 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:27:41,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:41,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:27:41,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591319543] [2019-11-23 20:27:41,987 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:27:41,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:41,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:27:41,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:27:41,988 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2019-11-23 20:27:42,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:42,031 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2019-11-23 20:27:42,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:27:42,032 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-11-23 20:27:42,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:42,033 INFO L225 Difference]: With dead ends: 35 [2019-11-23 20:27:42,033 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 20:27:42,034 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:27:42,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 20:27:42,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-23 20:27:42,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 20:27:42,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-11-23 20:27:42,039 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2019-11-23 20:27:42,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:42,039 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-11-23 20:27:42,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:27:42,039 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-11-23 20:27:42,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:27:42,040 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:42,040 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:42,244 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:42,245 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:42,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:42,245 INFO L82 PathProgramCache]: Analyzing trace with hash 315152758, now seen corresponding path program 5 times [2019-11-23 20:27:42,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:42,246 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763206197] [2019-11-23 20:27:42,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:42,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:42,361 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:27:42,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763206197] [2019-11-23 20:27:42,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906753753] [2019-11-23 20:27:42,363 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:42,448 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:27:42,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:42,449 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:27:42,451 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:27:42,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:42,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:27:42,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689406456] [2019-11-23 20:27:42,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:27:42,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:42,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:27:42,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:27:42,474 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 9 states. [2019-11-23 20:27:42,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:42,529 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-11-23 20:27:42,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:27:42,533 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2019-11-23 20:27:42,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:42,534 INFO L225 Difference]: With dead ends: 38 [2019-11-23 20:27:42,534 INFO L226 Difference]: Without dead ends: 24 [2019-11-23 20:27:42,535 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:27:42,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-23 20:27:42,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-23 20:27:42,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:27:42,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-23 20:27:42,544 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2019-11-23 20:27:42,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:42,545 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-23 20:27:42,545 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:27:42,545 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-23 20:27:42,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:27:42,546 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:42,547 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:42,757 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:42,758 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:42,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:42,758 INFO L82 PathProgramCache]: Analyzing trace with hash -846091049, now seen corresponding path program 6 times [2019-11-23 20:27:42,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:42,759 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476628593] [2019-11-23 20:27:42,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:42,881 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:27:42,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476628593] [2019-11-23 20:27:42,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170795801] [2019-11-23 20:27:42,882 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:42,925 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:27:42,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:42,927 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:27:42,928 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:27:42,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:42,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:27:42,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796002856] [2019-11-23 20:27:42,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:27:42,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:42,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:27:42,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:27:42,948 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 10 states. [2019-11-23 20:27:43,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:43,011 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2019-11-23 20:27:43,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:27:43,011 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-11-23 20:27:43,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:43,012 INFO L225 Difference]: With dead ends: 41 [2019-11-23 20:27:43,012 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 20:27:43,013 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:27:43,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 20:27:43,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-23 20:27:43,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:27:43,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-11-23 20:27:43,020 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2019-11-23 20:27:43,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:43,021 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-11-23 20:27:43,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:27:43,021 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-11-23 20:27:43,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:27:43,022 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:43,022 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:43,227 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:43,227 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:43,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:43,228 INFO L82 PathProgramCache]: Analyzing trace with hash 401698902, now seen corresponding path program 7 times [2019-11-23 20:27:43,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:43,228 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986342735] [2019-11-23 20:27:43,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:27:43,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986342735] [2019-11-23 20:27:43,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080467614] [2019-11-23 20:27:43,377 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:43,426 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:27:43,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:43,441 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:27:43,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:43,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:27:43,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060933232] [2019-11-23 20:27:43,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:27:43,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:43,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:27:43,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:27:43,444 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 11 states. [2019-11-23 20:27:43,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:43,504 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2019-11-23 20:27:43,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:27:43,504 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2019-11-23 20:27:43,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:43,505 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:27:43,506 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 20:27:43,507 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:27:43,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 20:27:43,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-23 20:27:43,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:27:43,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-23 20:27:43,513 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2019-11-23 20:27:43,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:43,513 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-23 20:27:43,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:27:43,513 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-23 20:27:43,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:27:43,514 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:43,514 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:43,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:43,715 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:43,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:43,716 INFO L82 PathProgramCache]: Analyzing trace with hash -88565897, now seen corresponding path program 8 times [2019-11-23 20:27:43,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:43,717 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077323803] [2019-11-23 20:27:43,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:27:43,863 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077323803] [2019-11-23 20:27:43,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006067068] [2019-11-23 20:27:43,864 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:43,920 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:27:43,920 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:43,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:27:43,928 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:43,958 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:27:43,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:43,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:27:43,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542789355] [2019-11-23 20:27:43,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:27:43,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:43,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:27:43,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:27:43,960 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 12 states. [2019-11-23 20:27:44,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:44,023 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2019-11-23 20:27:44,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:27:44,024 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2019-11-23 20:27:44,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:44,025 INFO L225 Difference]: With dead ends: 47 [2019-11-23 20:27:44,025 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:27:44,026 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:27:44,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:27:44,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-11-23 20:27:44,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:27:44,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-11-23 20:27:44,034 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2019-11-23 20:27:44,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:44,035 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-11-23 20:27:44,035 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:27:44,035 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-11-23 20:27:44,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:27:44,036 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:44,036 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:44,237 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:44,237 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:44,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:44,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1068425418, now seen corresponding path program 9 times [2019-11-23 20:27:44,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:44,238 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821963762] [2019-11-23 20:27:44,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:44,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:44,381 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-23 20:27:44,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821963762] [2019-11-23 20:27:44,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209355931] [2019-11-23 20:27:44,382 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:44,617 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:27:44,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:44,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:27:44,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:44,637 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-23 20:27:44,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:44,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:27:44,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959015823] [2019-11-23 20:27:44,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:27:44,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:44,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:27:44,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:27:44,639 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 13 states. [2019-11-23 20:27:44,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:44,688 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2019-11-23 20:27:44,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:27:44,689 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2019-11-23 20:27:44,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:44,690 INFO L225 Difference]: With dead ends: 50 [2019-11-23 20:27:44,690 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 20:27:44,691 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:27:44,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 20:27:44,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-23 20:27:44,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:27:44,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-11-23 20:27:44,696 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2019-11-23 20:27:44,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:44,696 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-11-23 20:27:44,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:27:44,696 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-11-23 20:27:44,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:27:44,697 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:44,697 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:44,901 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:44,902 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:44,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:44,903 INFO L82 PathProgramCache]: Analyzing trace with hash 163359255, now seen corresponding path program 10 times [2019-11-23 20:27:44,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:44,904 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293476318] [2019-11-23 20:27:44,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:44,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-23 20:27:45,064 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293476318] [2019-11-23 20:27:45,064 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501797681] [2019-11-23 20:27:45,065 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:45,113 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:27:45,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:45,114 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:27:45,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-23 20:27:45,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:45,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:27:45,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527421683] [2019-11-23 20:27:45,130 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:27:45,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:45,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:27:45,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:27:45,131 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 14 states. [2019-11-23 20:27:45,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:45,199 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2019-11-23 20:27:45,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:27:45,200 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2019-11-23 20:27:45,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:45,201 INFO L225 Difference]: With dead ends: 53 [2019-11-23 20:27:45,201 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 20:27:45,201 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:27:45,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 20:27:45,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-11-23 20:27:45,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:27:45,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-11-23 20:27:45,212 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2019-11-23 20:27:45,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:45,213 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-11-23 20:27:45,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:27:45,213 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-11-23 20:27:45,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:27:45,215 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:45,215 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:45,426 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:45,427 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:45,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:45,428 INFO L82 PathProgramCache]: Analyzing trace with hash 425322006, now seen corresponding path program 11 times [2019-11-23 20:27:45,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:45,429 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854393702] [2019-11-23 20:27:45,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:45,630 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:27:45,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854393702] [2019-11-23 20:27:45,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739568526] [2019-11-23 20:27:45,631 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:46,075 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-23 20:27:46,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:46,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:27:46,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:27:46,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:46,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:27:46,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397840169] [2019-11-23 20:27:46,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:27:46,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:46,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:27:46,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:27:46,114 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 15 states. [2019-11-23 20:27:46,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:46,175 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2019-11-23 20:27:46,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:27:46,176 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2019-11-23 20:27:46,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:46,177 INFO L225 Difference]: With dead ends: 56 [2019-11-23 20:27:46,177 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:27:46,177 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:27:46,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:27:46,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-23 20:27:46,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:27:46,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-11-23 20:27:46,185 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2019-11-23 20:27:46,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:46,185 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-11-23 20:27:46,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:27:46,185 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-11-23 20:27:46,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:27:46,187 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:46,187 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:46,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:46,391 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:46,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:46,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1597250377, now seen corresponding path program 12 times [2019-11-23 20:27:46,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:46,393 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945772278] [2019-11-23 20:27:46,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-23 20:27:46,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945772278] [2019-11-23 20:27:46,553 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844685829] [2019-11-23 20:27:46,553 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:46,806 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:27:46,807 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:46,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:27:46,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:46,835 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 12 proven. 78 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:27:46,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:46,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 17 [2019-11-23 20:27:46,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515489909] [2019-11-23 20:27:46,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:27:46,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:46,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:27:46,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:27:46,837 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 17 states. [2019-11-23 20:27:46,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:46,906 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2019-11-23 20:27:46,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:27:46,907 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2019-11-23 20:27:46,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:46,907 INFO L225 Difference]: With dead ends: 59 [2019-11-23 20:27:46,907 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 20:27:46,908 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:27:46,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 20:27:46,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-23 20:27:46,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:27:46,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2019-11-23 20:27:46,913 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 33 [2019-11-23 20:27:46,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:46,913 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2019-11-23 20:27:46,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:27:46,913 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2019-11-23 20:27:46,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:27:46,914 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:46,914 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:47,118 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:47,118 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:47,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:47,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1878902006, now seen corresponding path program 13 times [2019-11-23 20:27:47,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:47,120 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166026277] [2019-11-23 20:27:47,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:47,270 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:27:47,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166026277] [2019-11-23 20:27:47,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175668538] [2019-11-23 20:27:47,271 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:47,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:47,314 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:27:47,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:27:47,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:47,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:27:47,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023878001] [2019-11-23 20:27:47,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:27:47,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:47,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:27:47,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:27:47,342 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 17 states. [2019-11-23 20:27:47,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:47,415 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2019-11-23 20:27:47,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:27:47,415 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2019-11-23 20:27:47,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:47,415 INFO L225 Difference]: With dead ends: 62 [2019-11-23 20:27:47,416 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 20:27:47,416 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:27:47,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 20:27:47,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-11-23 20:27:47,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 20:27:47,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2019-11-23 20:27:47,421 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2019-11-23 20:27:47,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:47,422 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2019-11-23 20:27:47,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:27:47,422 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2019-11-23 20:27:47,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 20:27:47,423 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:47,423 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:47,625 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:47,626 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:47,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:47,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1720993623, now seen corresponding path program 14 times [2019-11-23 20:27:47,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:47,626 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674268144] [2019-11-23 20:27:47,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-23 20:27:47,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674268144] [2019-11-23 20:27:47,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993759696] [2019-11-23 20:27:47,818 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:47,897 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:27:47,897 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:47,899 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:27:47,902 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-23 20:27:47,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:47,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:27:47,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254139538] [2019-11-23 20:27:47,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:27:47,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:47,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:27:47,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:27:47,957 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 18 states. [2019-11-23 20:27:48,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:48,062 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2019-11-23 20:27:48,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:27:48,063 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2019-11-23 20:27:48,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:48,064 INFO L225 Difference]: With dead ends: 65 [2019-11-23 20:27:48,064 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 20:27:48,069 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:27:48,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 20:27:48,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-11-23 20:27:48,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:27:48,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2019-11-23 20:27:48,074 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2019-11-23 20:27:48,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:48,074 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2019-11-23 20:27:48,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:27:48,075 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2019-11-23 20:27:48,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:27:48,075 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:48,075 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:48,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:48,276 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:48,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:48,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1890499542, now seen corresponding path program 15 times [2019-11-23 20:27:48,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:48,277 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034751194] [2019-11-23 20:27:48,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-11-23 20:27:48,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034751194] [2019-11-23 20:27:48,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659264505] [2019-11-23 20:27:48,468 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:49,113 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:27:49,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:49,116 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:27:49,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-11-23 20:27:49,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:49,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:27:49,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112082864] [2019-11-23 20:27:49,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:27:49,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:49,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:27:49,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:27:49,154 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 19 states. [2019-11-23 20:27:49,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:49,242 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2019-11-23 20:27:49,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:27:49,242 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2019-11-23 20:27:49,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:49,243 INFO L225 Difference]: With dead ends: 68 [2019-11-23 20:27:49,243 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 20:27:49,244 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:27:49,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 20:27:49,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-23 20:27:49,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:27:49,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2019-11-23 20:27:49,249 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 39 [2019-11-23 20:27:49,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:49,249 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2019-11-23 20:27:49,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:27:49,250 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2019-11-23 20:27:49,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:27:49,250 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:49,250 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:49,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:49,462 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:49,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:49,462 INFO L82 PathProgramCache]: Analyzing trace with hash -498871817, now seen corresponding path program 16 times [2019-11-23 20:27:49,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:49,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549631542] [2019-11-23 20:27:49,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:49,669 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-23 20:27:49,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549631542] [2019-11-23 20:27:49,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130711906] [2019-11-23 20:27:49,670 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:49,714 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:27:49,714 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:49,716 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:27:49,719 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:49,747 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-23 20:27:49,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:49,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:27:49,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770333594] [2019-11-23 20:27:49,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:27:49,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:49,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:27:49,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:27:49,749 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 20 states. [2019-11-23 20:27:49,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:49,828 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2019-11-23 20:27:49,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:27:49,829 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2019-11-23 20:27:49,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:49,830 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:27:49,830 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:27:49,831 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:27:49,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:27:49,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-11-23 20:27:49,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:27:49,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2019-11-23 20:27:49,840 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 41 [2019-11-23 20:27:49,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:49,841 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2019-11-23 20:27:49,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:27:49,841 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2019-11-23 20:27:49,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:27:49,842 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:49,842 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:50,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:50,043 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:50,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:50,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1197394614, now seen corresponding path program 17 times [2019-11-23 20:27:50,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:50,043 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901313497] [2019-11-23 20:27:50,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:50,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-11-23 20:27:50,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901313497] [2019-11-23 20:27:50,251 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359580853] [2019-11-23 20:27:50,251 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:58,212 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-23 20:27:58,213 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:58,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:27:58,224 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:58,242 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-11-23 20:27:58,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:58,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 20:27:58,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054131765] [2019-11-23 20:27:58,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:27:58,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:58,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:27:58,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:27:58,244 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 21 states. [2019-11-23 20:27:58,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:58,330 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2019-11-23 20:27:58,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:27:58,330 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 43 [2019-11-23 20:27:58,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:58,331 INFO L225 Difference]: With dead ends: 74 [2019-11-23 20:27:58,331 INFO L226 Difference]: Without dead ends: 48 [2019-11-23 20:27:58,332 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:27:58,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-23 20:27:58,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-11-23 20:27:58,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:27:58,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2019-11-23 20:27:58,338 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 43 [2019-11-23 20:27:58,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:58,338 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2019-11-23 20:27:58,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:27:58,338 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2019-11-23 20:27:58,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:27:58,339 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:58,339 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:58,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:58,547 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:58,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:58,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1535673495, now seen corresponding path program 18 times [2019-11-23 20:27:58,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:58,549 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355945789] [2019-11-23 20:27:58,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:58,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-11-23 20:27:58,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355945789] [2019-11-23 20:27:58,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101112389] [2019-11-23 20:27:58,762 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:00,608 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-11-23 20:28:00,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:00,613 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:28:00,614 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 18 proven. 171 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-11-23 20:28:00,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:00,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 23 [2019-11-23 20:28:00,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600513177] [2019-11-23 20:28:00,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:28:00,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:00,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:28:00,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:28:00,664 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 23 states. [2019-11-23 20:28:00,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:00,752 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2019-11-23 20:28:00,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:28:00,752 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2019-11-23 20:28:00,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:00,753 INFO L225 Difference]: With dead ends: 77 [2019-11-23 20:28:00,753 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:28:00,754 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:28:00,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:28:00,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-23 20:28:00,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:28:00,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2019-11-23 20:28:00,758 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 45 [2019-11-23 20:28:00,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:00,759 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2019-11-23 20:28:00,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:28:00,759 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2019-11-23 20:28:00,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:28:00,759 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:00,759 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:00,964 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:00,965 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:00,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:00,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1082134122, now seen corresponding path program 19 times [2019-11-23 20:28:00,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:00,965 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392043007] [2019-11-23 20:28:00,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-23 20:28:01,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392043007] [2019-11-23 20:28:01,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810510664] [2019-11-23 20:28:01,263 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:01,340 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:28:01,342 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-23 20:28:01,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:01,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:28:01,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526360878] [2019-11-23 20:28:01,388 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:28:01,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:01,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:28:01,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:28:01,390 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 23 states. [2019-11-23 20:28:01,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:01,472 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2019-11-23 20:28:01,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:28:01,472 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 47 [2019-11-23 20:28:01,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:01,473 INFO L225 Difference]: With dead ends: 80 [2019-11-23 20:28:01,473 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 20:28:01,473 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:28:01,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 20:28:01,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-23 20:28:01,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-23 20:28:01,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2019-11-23 20:28:01,485 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2019-11-23 20:28:01,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:01,485 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2019-11-23 20:28:01,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:28:01,485 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2019-11-23 20:28:01,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:28:01,486 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:01,486 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:01,689 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:01,689 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:01,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:01,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1164943561, now seen corresponding path program 20 times [2019-11-23 20:28:01,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:01,690 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717922449] [2019-11-23 20:28:01,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:28:02,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717922449] [2019-11-23 20:28:02,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283010073] [2019-11-23 20:28:02,003 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:02,056 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:28:02,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:02,058 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:28:02,059 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:28:02,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:02,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:28:02,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312530090] [2019-11-23 20:28:02,078 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:28:02,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:02,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:28:02,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:28:02,079 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 24 states. [2019-11-23 20:28:02,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:02,169 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2019-11-23 20:28:02,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:28:02,170 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 49 [2019-11-23 20:28:02,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:02,170 INFO L225 Difference]: With dead ends: 83 [2019-11-23 20:28:02,170 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 20:28:02,171 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:28:02,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 20:28:02,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-11-23 20:28:02,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:28:02,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2019-11-23 20:28:02,176 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 49 [2019-11-23 20:28:02,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:02,176 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2019-11-23 20:28:02,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:28:02,177 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2019-11-23 20:28:02,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:28:02,177 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:02,177 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:02,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:02,381 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:02,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:02,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1677996150, now seen corresponding path program 21 times [2019-11-23 20:28:02,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:02,382 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845901959] [2019-11-23 20:28:02,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-11-23 20:28:02,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845901959] [2019-11-23 20:28:02,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808320595] [2019-11-23 20:28:02,654 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:04,447 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 20:28:04,447 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:04,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:28:04,452 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 21 proven. 231 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:28:04,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:04,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 26 [2019-11-23 20:28:04,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187259566] [2019-11-23 20:28:04,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:28:04,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:04,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:28:04,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:28:04,485 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 26 states. [2019-11-23 20:28:04,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:04,572 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2019-11-23 20:28:04,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:28:04,575 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2019-11-23 20:28:04,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:04,576 INFO L225 Difference]: With dead ends: 86 [2019-11-23 20:28:04,576 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 20:28:04,577 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:28:04,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 20:28:04,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-23 20:28:04,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 20:28:04,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2019-11-23 20:28:04,585 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 51 [2019-11-23 20:28:04,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:04,585 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2019-11-23 20:28:04,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:28:04,585 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2019-11-23 20:28:04,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 20:28:04,586 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:04,586 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:04,792 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:04,792 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:04,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:04,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1745445335, now seen corresponding path program 22 times [2019-11-23 20:28:04,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:04,793 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494523757] [2019-11-23 20:28:04,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:04,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:05,099 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-23 20:28:05,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494523757] [2019-11-23 20:28:05,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151480377] [2019-11-23 20:28:05,100 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:05,148 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:28:05,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:05,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:28:05,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-23 20:28:05,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:05,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 20:28:05,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32494066] [2019-11-23 20:28:05,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:28:05,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:05,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:28:05,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:28:05,164 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 26 states. [2019-11-23 20:28:05,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:05,255 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2019-11-23 20:28:05,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:28:05,256 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 53 [2019-11-23 20:28:05,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:05,257 INFO L225 Difference]: With dead ends: 89 [2019-11-23 20:28:05,257 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:28:05,257 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:28:05,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:28:05,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-23 20:28:05,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:28:05,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2019-11-23 20:28:05,261 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2019-11-23 20:28:05,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:05,262 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2019-11-23 20:28:05,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:28:05,262 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2019-11-23 20:28:05,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:28:05,263 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:05,263 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:05,465 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:05,466 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:05,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:05,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1621260458, now seen corresponding path program 23 times [2019-11-23 20:28:05,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:05,467 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319673725] [2019-11-23 20:28:05,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-11-23 20:28:05,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319673725] [2019-11-23 20:28:05,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737915311] [2019-11-23 20:28:05,794 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:25,512 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-11-23 20:28:25,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:25,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 20:28:25,534 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-11-23 20:28:25,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:25,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-23 20:28:25,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955317520] [2019-11-23 20:28:25,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:28:25,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:25,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:28:25,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:28:25,550 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 27 states. [2019-11-23 20:28:25,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:25,693 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2019-11-23 20:28:25,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:28:25,694 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 55 [2019-11-23 20:28:25,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:25,695 INFO L225 Difference]: With dead ends: 92 [2019-11-23 20:28:25,695 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 20:28:25,696 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:28:25,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 20:28:25,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-11-23 20:28:25,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-23 20:28:25,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2019-11-23 20:28:25,699 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 55 [2019-11-23 20:28:25,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:25,699 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2019-11-23 20:28:25,699 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:28:25,700 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2019-11-23 20:28:25,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:28:25,700 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:25,700 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:25,901 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:25,901 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:25,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:25,902 INFO L82 PathProgramCache]: Analyzing trace with hash 757173367, now seen corresponding path program 24 times [2019-11-23 20:28:25,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:25,902 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718891267] [2019-11-23 20:28:25,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-11-23 20:28:26,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718891267] [2019-11-23 20:28:26,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174948746] [2019-11-23 20:28:26,237 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:34,121 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:28:34,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:34,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 20:28:34,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:34,144 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-11-23 20:28:34,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:34,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-23 20:28:34,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162180159] [2019-11-23 20:28:34,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:28:34,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:34,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:28:34,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:28:34,147 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 28 states. [2019-11-23 20:28:34,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:34,261 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2019-11-23 20:28:34,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:28:34,262 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 57 [2019-11-23 20:28:34,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:34,262 INFO L225 Difference]: With dead ends: 95 [2019-11-23 20:28:34,263 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:28:34,264 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:28:34,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:28:34,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-23 20:28:34,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:28:34,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2019-11-23 20:28:34,267 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 57 [2019-11-23 20:28:34,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:34,268 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2019-11-23 20:28:34,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:28:34,268 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2019-11-23 20:28:34,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:28:34,268 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:34,268 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:34,475 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:34,476 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:34,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:34,477 INFO L82 PathProgramCache]: Analyzing trace with hash -612501962, now seen corresponding path program 25 times [2019-11-23 20:28:34,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:34,477 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19333052] [2019-11-23 20:28:34,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-11-23 20:28:34,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19333052] [2019-11-23 20:28:34,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273491047] [2019-11-23 20:28:34,956 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:35,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:35,012 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:28:35,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:35,025 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-11-23 20:28:35,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:35,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 20:28:35,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157777209] [2019-11-23 20:28:35,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:28:35,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:35,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:28:35,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:28:35,027 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 29 states. [2019-11-23 20:28:35,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:35,125 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2019-11-23 20:28:35,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:28:35,127 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 59 [2019-11-23 20:28:35,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:35,127 INFO L225 Difference]: With dead ends: 98 [2019-11-23 20:28:35,127 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:28:35,128 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:28:35,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:28:35,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-11-23 20:28:35,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:28:35,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2019-11-23 20:28:35,131 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2019-11-23 20:28:35,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:35,132 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2019-11-23 20:28:35,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:28:35,132 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2019-11-23 20:28:35,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:28:35,132 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:35,132 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:35,335 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:35,336 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:35,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:35,336 INFO L82 PathProgramCache]: Analyzing trace with hash 327606039, now seen corresponding path program 26 times [2019-11-23 20:28:35,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:35,336 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961593875] [2019-11-23 20:28:35,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:35,739 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-11-23 20:28:35,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961593875] [2019-11-23 20:28:35,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607169413] [2019-11-23 20:28:35,740 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:35,799 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:28:35,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:35,800 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:28:35,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-11-23 20:28:35,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:35,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:28:35,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601995474] [2019-11-23 20:28:35,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:28:35,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:35,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:28:35,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:28:35,815 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 30 states. [2019-11-23 20:28:35,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:35,919 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2019-11-23 20:28:35,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:28:35,921 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 61 [2019-11-23 20:28:35,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:35,922 INFO L225 Difference]: With dead ends: 101 [2019-11-23 20:28:35,922 INFO L226 Difference]: Without dead ends: 66 [2019-11-23 20:28:35,923 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:28:35,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-23 20:28:35,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-11-23 20:28:35,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:28:35,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2019-11-23 20:28:35,926 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 61 [2019-11-23 20:28:35,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:35,926 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2019-11-23 20:28:35,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:28:35,926 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2019-11-23 20:28:35,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:28:35,926 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:35,927 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:36,127 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:36,127 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:36,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:36,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1579713258, now seen corresponding path program 27 times [2019-11-23 20:28:36,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:36,129 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284467330] [2019-11-23 20:28:36,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:36,499 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2019-11-23 20:28:36,499 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284467330] [2019-11-23 20:28:36,499 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202467243] [2019-11-23 20:28:36,499 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:50,608 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-11-23 20:28:50,608 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:50,615 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 20:28:50,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2019-11-23 20:28:50,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:50,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-11-23 20:28:50,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848052290] [2019-11-23 20:28:50,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:28:50,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:50,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:28:50,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:28:50,632 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 31 states. [2019-11-23 20:28:50,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:50,734 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2019-11-23 20:28:50,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 20:28:50,735 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 63 [2019-11-23 20:28:50,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:50,736 INFO L225 Difference]: With dead ends: 104 [2019-11-23 20:28:50,736 INFO L226 Difference]: Without dead ends: 68 [2019-11-23 20:28:50,736 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:28:50,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-23 20:28:50,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-11-23 20:28:50,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-23 20:28:50,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2019-11-23 20:28:50,739 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 63 [2019-11-23 20:28:50,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:50,739 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2019-11-23 20:28:50,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:28:50,739 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2019-11-23 20:28:50,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:28:50,740 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:50,740 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:50,945 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:50,945 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:50,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:50,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1164401079, now seen corresponding path program 28 times [2019-11-23 20:28:50,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:50,946 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217027791] [2019-11-23 20:28:50,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:51,352 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2019-11-23 20:28:51,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217027791] [2019-11-23 20:28:51,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39277234] [2019-11-23 20:28:51,353 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:51,412 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:28:51,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:51,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:28:51,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:51,427 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2019-11-23 20:28:51,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:51,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 20:28:51,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906195969] [2019-11-23 20:28:51,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:28:51,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:51,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:28:51,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:28:51,430 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 32 states. [2019-11-23 20:28:51,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:51,562 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2019-11-23 20:28:51,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:28:51,566 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 65 [2019-11-23 20:28:51,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:51,567 INFO L225 Difference]: With dead ends: 107 [2019-11-23 20:28:51,567 INFO L226 Difference]: Without dead ends: 70 [2019-11-23 20:28:51,568 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:28:51,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-23 20:28:51,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-11-23 20:28:51,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:28:51,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2019-11-23 20:28:51,572 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 65 [2019-11-23 20:28:51,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:51,573 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2019-11-23 20:28:51,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:28:51,573 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2019-11-23 20:28:51,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 20:28:51,573 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:51,574 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:51,777 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:51,778 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:51,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:51,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1151591434, now seen corresponding path program 29 times [2019-11-23 20:28:51,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:51,779 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710477433] [2019-11-23 20:28:51,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:52,235 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2019-11-23 20:28:52,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710477433] [2019-11-23 20:28:52,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114285961] [2019-11-23 20:28:52,236 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true