/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:11:08,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:11:08,644 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:11:08,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 01:11:08,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 01:11:08,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 01:11:08,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 01:11:08,675 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 01:11:08,678 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 01:11:08,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 01:11:08,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 01:11:08,685 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 01:11:08,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:11:08,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:11:08,689 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:11:08,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:11:08,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:11:08,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:11:08,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:11:08,698 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:11:08,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:11:08,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:11:08,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:11:08,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:11:08,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 01:11:08,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:11:08,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:11:08,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:11:08,721 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 01:11:08,750 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:11:08,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:11:08,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:11:08,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:11:08,752 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:11:08,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:11:08,753 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:11:08,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:11:08,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:11:08,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:11:08,754 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:11:08,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:11:08,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:11:08,755 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:11:08,755 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:11:08,756 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:11:08,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:11:08,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:11:08,756 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:11:08,756 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:11:08,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:11:08,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:11:08,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:11:08,757 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:11:08,757 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:11:08,758 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:11:08,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:11:08,758 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:11:08,758 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:11:08,758 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 01:11:09,036 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:11:09,049 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:11:09,053 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:11:09,054 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:11:09,055 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:11:09,055 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-07-20 01:11:09,115 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90a61e0eb/ced78737867d41c69326dce29954c932/FLAG8c3f88e31 [2020-07-20 01:11:09,538 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:11:09,539 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-07-20 01:11:09,545 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90a61e0eb/ced78737867d41c69326dce29954c932/FLAG8c3f88e31 [2020-07-20 01:11:09,969 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90a61e0eb/ced78737867d41c69326dce29954c932 [2020-07-20 01:11:09,978 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:11:09,981 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:11:09,982 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:11:09,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:11:09,986 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:11:09,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:11:09" (1/1) ... [2020-07-20 01:11:09,989 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1553bfc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:09, skipping insertion in model container [2020-07-20 01:11:09,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:11:09" (1/1) ... [2020-07-20 01:11:09,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:11:10,014 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:11:10,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:11:10,196 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:11:10,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:11:10,223 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:11:10,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:10 WrapperNode [2020-07-20 01:11:10,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:11:10,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:11:10,225 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:11:10,225 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:11:10,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:10" (1/1) ... [2020-07-20 01:11:10,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:10" (1/1) ... [2020-07-20 01:11:10,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:10" (1/1) ... [2020-07-20 01:11:10,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:10" (1/1) ... [2020-07-20 01:11:10,332 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:10" (1/1) ... [2020-07-20 01:11:10,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:10" (1/1) ... [2020-07-20 01:11:10,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:10" (1/1) ... [2020-07-20 01:11:10,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:11:10,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:11:10,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:11:10,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:11:10,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:11:10,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:11:10,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:11:10,411 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2020-07-20 01:11:10,411 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2020-07-20 01:11:10,411 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:11:10,411 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:11:10,411 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 01:11:10,411 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2020-07-20 01:11:10,411 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2020-07-20 01:11:10,412 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:11:10,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:11:10,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:11:10,611 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:11:10,611 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 01:11:10,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:11:10 BoogieIcfgContainer [2020-07-20 01:11:10,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:11:10,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:11:10,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:11:10,621 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:11:10,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:11:09" (1/3) ... [2020-07-20 01:11:10,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b214e29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:11:10, skipping insertion in model container [2020-07-20 01:11:10,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:10" (2/3) ... [2020-07-20 01:11:10,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b214e29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:11:10, skipping insertion in model container [2020-07-20 01:11:10,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:11:10" (3/3) ... [2020-07-20 01:11:10,627 INFO L109 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2020-07-20 01:11:10,644 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:11:10,653 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:11:10,672 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:11:10,698 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:11:10,698 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:11:10,698 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:11:10,698 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:11:10,698 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:11:10,698 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:11:10,699 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:11:10,699 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:11:10,719 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-20 01:11:10,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 01:11:10,726 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:10,727 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:10,727 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:10,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:10,734 INFO L82 PathProgramCache]: Analyzing trace with hash -2122072279, now seen corresponding path program 1 times [2020-07-20 01:11:10,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:10,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052808704] [2020-07-20 01:11:10,746 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:11:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:11,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:11,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:11:11,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052808704] [2020-07-20 01:11:11,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:11:11,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 01:11:11,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801636033] [2020-07-20 01:11:11,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 01:11:11,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:11,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 01:11:11,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:11:11,087 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 7 states. [2020-07-20 01:11:11,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:11,285 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-07-20 01:11:11,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 01:11:11,289 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-07-20 01:11:11,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:11,307 INFO L225 Difference]: With dead ends: 41 [2020-07-20 01:11:11,308 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 01:11:11,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:11:11,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 01:11:11,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 01:11:11,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 01:11:11,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-07-20 01:11:11,378 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2020-07-20 01:11:11,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:11,379 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-07-20 01:11:11,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 01:11:11,381 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-07-20 01:11:11,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 01:11:11,386 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:11,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:11,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:11:11,388 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:11,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:11,388 INFO L82 PathProgramCache]: Analyzing trace with hash -612070348, now seen corresponding path program 1 times [2020-07-20 01:11:11,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:11,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622553891] [2020-07-20 01:11:11,389 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:11:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:11,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:11,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:11:11,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622553891] [2020-07-20 01:11:11,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:11:11,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 01:11:11,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394804674] [2020-07-20 01:11:11,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 01:11:11,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:11,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 01:11:11,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:11:11,624 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2020-07-20 01:11:11,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:11,746 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-07-20 01:11:11,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 01:11:11,748 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-07-20 01:11:11,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:11,749 INFO L225 Difference]: With dead ends: 33 [2020-07-20 01:11:11,749 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 01:11:11,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:11:11,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 01:11:11,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-07-20 01:11:11,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 01:11:11,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-07-20 01:11:11,765 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2020-07-20 01:11:11,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:11,766 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-07-20 01:11:11,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 01:11:11,766 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-07-20 01:11:11,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 01:11:11,768 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:11,768 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:11,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 01:11:11,769 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:11,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:11,770 INFO L82 PathProgramCache]: Analyzing trace with hash -592576498, now seen corresponding path program 1 times [2020-07-20 01:11:11,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:11,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078187036] [2020-07-20 01:11:11,772 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:11:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:11,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:11,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:11:11,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078187036] [2020-07-20 01:11:11,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:11:11,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 01:11:11,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930455379] [2020-07-20 01:11:11,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:11:11,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:11,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:11:11,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:11:11,909 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2020-07-20 01:11:11,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:11,976 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-07-20 01:11:11,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 01:11:11,977 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-20 01:11:11,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:11,979 INFO L225 Difference]: With dead ends: 41 [2020-07-20 01:11:11,979 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 01:11:11,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:11:11,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 01:11:11,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-07-20 01:11:11,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 01:11:11,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-07-20 01:11:11,989 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2020-07-20 01:11:11,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:11,989 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-07-20 01:11:11,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:11:11,990 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-07-20 01:11:11,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 01:11:11,991 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:11,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:11,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 01:11:11,991 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:11,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:11,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1306118367, now seen corresponding path program 1 times [2020-07-20 01:11:11,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:11,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662013623] [2020-07-20 01:11:11,993 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:11:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:11:12,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662013623] [2020-07-20 01:11:12,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:11:12,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-20 01:11:12,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035068553] [2020-07-20 01:11:12,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 01:11:12,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:12,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 01:11:12,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-20 01:11:12,154 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 10 states. [2020-07-20 01:11:12,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:12,316 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-07-20 01:11:12,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 01:11:12,317 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-07-20 01:11:12,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:12,318 INFO L225 Difference]: With dead ends: 36 [2020-07-20 01:11:12,318 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 01:11:12,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-07-20 01:11:12,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 01:11:12,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 01:11:12,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 01:11:12,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-07-20 01:11:12,326 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2020-07-20 01:11:12,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:12,326 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-07-20 01:11:12,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 01:11:12,327 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-07-20 01:11:12,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 01:11:12,328 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:12,328 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:12,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 01:11:12,328 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:12,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:12,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1571291849, now seen corresponding path program 1 times [2020-07-20 01:11:12,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:12,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306436618] [2020-07-20 01:11:12,330 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:11:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 01:11:12,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306436618] [2020-07-20 01:11:12,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:11:12,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 01:11:12,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765188553] [2020-07-20 01:11:12,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:11:12,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:12,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:11:12,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:11:12,408 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 5 states. [2020-07-20 01:11:12,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:12,467 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-07-20 01:11:12,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 01:11:12,467 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-07-20 01:11:12,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:12,468 INFO L225 Difference]: With dead ends: 42 [2020-07-20 01:11:12,468 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 01:11:12,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:11:12,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 01:11:12,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 01:11:12,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 01:11:12,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-07-20 01:11:12,481 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 28 [2020-07-20 01:11:12,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:12,481 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-07-20 01:11:12,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:11:12,482 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-07-20 01:11:12,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 01:11:12,483 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:12,483 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:12,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-20 01:11:12,484 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:12,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:12,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1610221656, now seen corresponding path program 1 times [2020-07-20 01:11:12,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:12,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372279747] [2020-07-20 01:11:12,486 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:11:12,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 01:11:12,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372279747] [2020-07-20 01:11:12,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879178875] [2020-07-20 01:11:12,744 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@230aeb8 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:12,789 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@230aeb8 issued 4 check-sat command(s) [2020-07-20 01:11:12,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:12,794 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-20 01:11:12,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:12,963 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:11:12,964 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:11:13,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 01:11:13,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:13,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 17 [2020-07-20 01:11:13,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105350451] [2020-07-20 01:11:13,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 01:11:13,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:13,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 01:11:13,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-07-20 01:11:13,056 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 17 states. [2020-07-20 01:11:13,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:13,317 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-07-20 01:11:13,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 01:11:13,318 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2020-07-20 01:11:13,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:13,319 INFO L225 Difference]: With dead ends: 42 [2020-07-20 01:11:13,319 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 01:11:13,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2020-07-20 01:11:13,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 01:11:13,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-07-20 01:11:13,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 01:11:13,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-07-20 01:11:13,326 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2020-07-20 01:11:13,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:13,327 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-07-20 01:11:13,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 01:11:13,327 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-07-20 01:11:13,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 01:11:13,328 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:13,328 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:13,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 01:11:13,529 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:13,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:13,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1417612799, now seen corresponding path program 1 times [2020-07-20 01:11:13,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:13,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726575779] [2020-07-20 01:11:13,531 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:11:13,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:13,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 01:11:13,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726575779] [2020-07-20 01:11:13,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851989832] [2020-07-20 01:11:13,762 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36ea593 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:13,793 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36ea593 issued 4 check-sat command(s) [2020-07-20 01:11:13,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:13,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-20 01:11:13,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:13,971 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:11:13,972 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:11:14,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 01:11:14,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:14,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2020-07-20 01:11:14,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773673940] [2020-07-20 01:11:14,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 01:11:14,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:14,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 01:11:14,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-07-20 01:11:14,071 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 22 states. [2020-07-20 01:11:14,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:14,454 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-07-20 01:11:14,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 01:11:14,454 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 36 [2020-07-20 01:11:14,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:14,455 INFO L225 Difference]: With dead ends: 48 [2020-07-20 01:11:14,455 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 01:11:14,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2020-07-20 01:11:14,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 01:11:14,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2020-07-20 01:11:14,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 01:11:14,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-07-20 01:11:14,468 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 36 [2020-07-20 01:11:14,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:14,469 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-07-20 01:11:14,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 01:11:14,470 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-07-20 01:11:14,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 01:11:14,472 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:14,472 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:14,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:14,688 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:14,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:14,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1668529660, now seen corresponding path program 2 times [2020-07-20 01:11:14,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:14,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041614648] [2020-07-20 01:11:14,690 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:11:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:15,094 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-20 01:11:15,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041614648] [2020-07-20 01:11:15,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263723419] [2020-07-20 01:11:15,096 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2315e1ff No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:15,135 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2315e1ff issued 4 check-sat command(s) [2020-07-20 01:11:15,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:15,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 48 conjunts are in the unsatisfiable core [2020-07-20 01:11:15,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:15,217 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:11:15,218 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:11:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-20 01:11:15,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:15,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2020-07-20 01:11:15,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140725214] [2020-07-20 01:11:15,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 01:11:15,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:15,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 01:11:15,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-07-20 01:11:15,310 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 19 states. [2020-07-20 01:11:15,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:15,696 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-07-20 01:11:15,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 01:11:15,696 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-07-20 01:11:15,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:15,697 INFO L225 Difference]: With dead ends: 54 [2020-07-20 01:11:15,698 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 01:11:15,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2020-07-20 01:11:15,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 01:11:15,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2020-07-20 01:11:15,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 01:11:15,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-07-20 01:11:15,705 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 43 [2020-07-20 01:11:15,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:15,706 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-07-20 01:11:15,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 01:11:15,706 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-07-20 01:11:15,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 01:11:15,707 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:15,707 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:15,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:15,909 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:15,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:15,909 INFO L82 PathProgramCache]: Analyzing trace with hash -150927713, now seen corresponding path program 2 times [2020-07-20 01:11:15,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:15,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637800632] [2020-07-20 01:11:15,911 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:11:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-07-20 01:11:16,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637800632] [2020-07-20 01:11:16,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277548743] [2020-07-20 01:11:16,294 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@461d9639 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:16,330 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@461d9639 issued 4 check-sat command(s) [2020-07-20 01:11:16,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:16,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 44 conjunts are in the unsatisfiable core [2020-07-20 01:11:16,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:16,675 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:11:16,678 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:11:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-07-20 01:11:16,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:16,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2020-07-20 01:11:16,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936246386] [2020-07-20 01:11:16,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-20 01:11:16,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:16,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-20 01:11:16,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2020-07-20 01:11:16,795 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 30 states. [2020-07-20 01:11:17,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:17,479 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-07-20 01:11:17,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 01:11:17,480 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 50 [2020-07-20 01:11:17,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:17,481 INFO L225 Difference]: With dead ends: 60 [2020-07-20 01:11:17,481 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 01:11:17,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=130, Invalid=1592, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 01:11:17,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 01:11:17,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2020-07-20 01:11:17,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 01:11:17,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-07-20 01:11:17,489 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 50 [2020-07-20 01:11:17,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:17,489 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-07-20 01:11:17,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-20 01:11:17,489 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-07-20 01:11:17,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-20 01:11:17,490 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:17,490 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:17,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:17,705 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:17,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:17,706 INFO L82 PathProgramCache]: Analyzing trace with hash -308892384, now seen corresponding path program 3 times [2020-07-20 01:11:17,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:17,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871898137] [2020-07-20 01:11:17,707 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:11:17,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:17,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:17,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-07-20 01:11:18,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871898137] [2020-07-20 01:11:18,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763341813] [2020-07-20 01:11:18,135 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@53dc8763 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:18,204 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@53dc8763 issued 4 check-sat command(s) [2020-07-20 01:11:18,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:18,206 WARN L261 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 64 conjunts are in the unsatisfiable core [2020-07-20 01:11:18,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:18,332 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:11:18,333 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:11:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-07-20 01:11:18,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:18,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 23 [2020-07-20 01:11:18,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393367423] [2020-07-20 01:11:18,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 01:11:18,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:18,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 01:11:18,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2020-07-20 01:11:18,423 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 23 states. [2020-07-20 01:11:19,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:19,080 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-07-20 01:11:19,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 01:11:19,080 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2020-07-20 01:11:19,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:19,082 INFO L225 Difference]: With dead ends: 66 [2020-07-20 01:11:19,082 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 01:11:19,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 01:11:19,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 01:11:19,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-20 01:11:19,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 01:11:19,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-07-20 01:11:19,089 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 57 [2020-07-20 01:11:19,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:19,090 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-07-20 01:11:19,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 01:11:19,090 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-07-20 01:11:19,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-07-20 01:11:19,091 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:19,091 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:19,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-20 01:11:19,308 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:19,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:19,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1668346559, now seen corresponding path program 3 times [2020-07-20 01:11:19,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:19,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026858818] [2020-07-20 01:11:19,309 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:11:19,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:19,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:19,845 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-07-20 01:11:19,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026858818] [2020-07-20 01:11:19,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10495069] [2020-07-20 01:11:19,846 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7cc806d4 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:19,890 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7cc806d4 issued 4 check-sat command(s) [2020-07-20 01:11:19,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:19,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 56 conjunts are in the unsatisfiable core [2020-07-20 01:11:19,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:20,425 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:11:20,426 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:11:20,559 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-07-20 01:11:20,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:20,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2020-07-20 01:11:20,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541893518] [2020-07-20 01:11:20,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-20 01:11:20,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:20,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-20 01:11:20,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1316, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 01:11:20,571 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 38 states. [2020-07-20 01:11:21,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:21,627 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-07-20 01:11:21,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 01:11:21,628 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 64 [2020-07-20 01:11:21,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:21,629 INFO L225 Difference]: With dead ends: 72 [2020-07-20 01:11:21,629 INFO L226 Difference]: Without dead ends: 68 [2020-07-20 01:11:21,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=170, Invalid=2692, Unknown=0, NotChecked=0, Total=2862 [2020-07-20 01:11:21,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-20 01:11:21,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-07-20 01:11:21,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 01:11:21,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-07-20 01:11:21,638 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 64 [2020-07-20 01:11:21,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:21,638 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-07-20 01:11:21,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-20 01:11:21,638 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-07-20 01:11:21,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-07-20 01:11:21,640 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:21,640 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:21,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:21,850 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:21,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:21,851 INFO L82 PathProgramCache]: Analyzing trace with hash 353359300, now seen corresponding path program 4 times [2020-07-20 01:11:21,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:21,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117538535] [2020-07-20 01:11:21,852 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:11:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:21,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:22,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:22,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:22,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:22,472 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-20 01:11:22,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117538535] [2020-07-20 01:11:22,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988503458] [2020-07-20 01:11:22,473 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3202c3c3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:22,526 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3202c3c3 issued 4 check-sat command(s) [2020-07-20 01:11:22,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:22,529 WARN L261 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 80 conjunts are in the unsatisfiable core [2020-07-20 01:11:22,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:22,651 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:11:22,651 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:11:22,765 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-20 01:11:22,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:22,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 27 [2020-07-20 01:11:22,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401751662] [2020-07-20 01:11:22,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 01:11:22,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:22,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 01:11:22,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2020-07-20 01:11:22,768 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 27 states. [2020-07-20 01:11:23,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:23,697 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-07-20 01:11:23,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 01:11:23,698 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 71 [2020-07-20 01:11:23,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:23,699 INFO L225 Difference]: With dead ends: 78 [2020-07-20 01:11:23,700 INFO L226 Difference]: Without dead ends: 74 [2020-07-20 01:11:23,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=132, Invalid=1848, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 01:11:23,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-20 01:11:23,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 51. [2020-07-20 01:11:23,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 01:11:23,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-07-20 01:11:23,711 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 71 [2020-07-20 01:11:23,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:23,711 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-07-20 01:11:23,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 01:11:23,711 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-07-20 01:11:23,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-20 01:11:23,712 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:23,713 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:23,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:23,927 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:23,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:23,928 INFO L82 PathProgramCache]: Analyzing trace with hash -165146017, now seen corresponding path program 4 times [2020-07-20 01:11:23,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:23,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841869409] [2020-07-20 01:11:23,929 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:11:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:24,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-07-20 01:11:24,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841869409] [2020-07-20 01:11:24,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532958374] [2020-07-20 01:11:24,581 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@294765ab No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:24,633 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@294765ab issued 4 check-sat command(s) [2020-07-20 01:11:24,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:24,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 68 conjunts are in the unsatisfiable core [2020-07-20 01:11:24,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:25,461 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:11:25,462 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:11:25,610 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-07-20 01:11:25,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:25,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 46 [2020-07-20 01:11:25,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254571681] [2020-07-20 01:11:25,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-07-20 01:11:25,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:25,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-07-20 01:11:25,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1960, Unknown=0, NotChecked=0, Total=2070 [2020-07-20 01:11:25,614 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 46 states. [2020-07-20 01:11:27,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:27,128 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-07-20 01:11:27,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 01:11:27,128 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 78 [2020-07-20 01:11:27,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:27,129 INFO L225 Difference]: With dead ends: 84 [2020-07-20 01:11:27,129 INFO L226 Difference]: Without dead ends: 80 [2020-07-20 01:11:27,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=210, Invalid=4080, Unknown=0, NotChecked=0, Total=4290 [2020-07-20 01:11:27,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-20 01:11:27,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2020-07-20 01:11:27,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 01:11:27,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-07-20 01:11:27,137 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 78 [2020-07-20 01:11:27,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:27,138 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-07-20 01:11:27,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-07-20 01:11:27,138 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-07-20 01:11:27,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-20 01:11:27,139 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:27,139 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:27,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-20 01:11:27,354 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:27,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:27,355 INFO L82 PathProgramCache]: Analyzing trace with hash 462698472, now seen corresponding path program 5 times [2020-07-20 01:11:27,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:27,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319186280] [2020-07-20 01:11:27,356 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:11:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:27,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:27,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:27,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:27,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:28,258 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-07-20 01:11:28,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319186280] [2020-07-20 01:11:28,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665244298] [2020-07-20 01:11:28,259 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5e2345 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:28,306 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5e2345 issued 4 check-sat command(s) [2020-07-20 01:11:28,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:28,309 WARN L261 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 96 conjunts are in the unsatisfiable core [2020-07-20 01:11:28,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:28,432 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:11:28,433 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:11:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-07-20 01:11:28,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:28,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 31 [2020-07-20 01:11:28,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773006230] [2020-07-20 01:11:28,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-20 01:11:28,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:28,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-20 01:11:28,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=864, Unknown=0, NotChecked=0, Total=930 [2020-07-20 01:11:28,550 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 31 states. [2020-07-20 01:11:29,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:29,724 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-07-20 01:11:29,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 01:11:29,725 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 85 [2020-07-20 01:11:29,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:29,726 INFO L225 Difference]: With dead ends: 90 [2020-07-20 01:11:29,726 INFO L226 Difference]: Without dead ends: 86 [2020-07-20 01:11:29,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=156, Invalid=2600, Unknown=0, NotChecked=0, Total=2756 [2020-07-20 01:11:29,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-20 01:11:29,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 57. [2020-07-20 01:11:29,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 01:11:29,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-07-20 01:11:29,737 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 85 [2020-07-20 01:11:29,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:29,737 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-07-20 01:11:29,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-20 01:11:29,737 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-07-20 01:11:29,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-20 01:11:29,739 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:29,739 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:29,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:29,949 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:29,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:29,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1580751489, now seen corresponding path program 5 times [2020-07-20 01:11:29,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:29,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131322729] [2020-07-20 01:11:29,951 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:11:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:30,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:30,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:30,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-07-20 01:11:30,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131322729] [2020-07-20 01:11:30,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150571957] [2020-07-20 01:11:30,806 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@32265461 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:30,849 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@32265461 issued 4 check-sat command(s) [2020-07-20 01:11:30,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:30,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 80 conjunts are in the unsatisfiable core [2020-07-20 01:11:30,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:31,952 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:11:31,953 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:11:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-07-20 01:11:32,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:32,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 54 [2020-07-20 01:11:32,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969259398] [2020-07-20 01:11:32,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-07-20 01:11:32,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:32,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-07-20 01:11:32,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2732, Unknown=0, NotChecked=0, Total=2862 [2020-07-20 01:11:32,115 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 54 states. [2020-07-20 01:11:34,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:34,308 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2020-07-20 01:11:34,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 01:11:34,308 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 92 [2020-07-20 01:11:34,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:34,311 INFO L225 Difference]: With dead ends: 96 [2020-07-20 01:11:34,311 INFO L226 Difference]: Without dead ends: 92 [2020-07-20 01:11:34,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=250, Invalid=5756, Unknown=0, NotChecked=0, Total=6006 [2020-07-20 01:11:34,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-20 01:11:34,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-20 01:11:34,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 01:11:34,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-07-20 01:11:34,326 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 92 [2020-07-20 01:11:34,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:34,327 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-07-20 01:11:34,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-07-20 01:11:34,327 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-07-20 01:11:34,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-07-20 01:11:34,328 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:34,328 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:34,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-20 01:11:34,534 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:34,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:34,536 INFO L82 PathProgramCache]: Analyzing trace with hash 165729164, now seen corresponding path program 6 times [2020-07-20 01:11:34,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:34,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256029051] [2020-07-20 01:11:34,537 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:11:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:34,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:34,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:35,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-07-20 01:11:35,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256029051] [2020-07-20 01:11:35,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127246270] [2020-07-20 01:11:35,654 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2c35bd67 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:35,724 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2c35bd67 issued 4 check-sat command(s) [2020-07-20 01:11:35,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:35,728 WARN L261 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 112 conjunts are in the unsatisfiable core [2020-07-20 01:11:35,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:35,875 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:11:35,876 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:11:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-07-20 01:11:36,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:36,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 35 [2020-07-20 01:11:36,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794250691] [2020-07-20 01:11:36,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-20 01:11:36,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:36,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-20 01:11:36,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1116, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 01:11:36,025 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 35 states. [2020-07-20 01:11:37,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:37,515 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-07-20 01:11:37,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 01:11:37,517 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 99 [2020-07-20 01:11:37,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:37,518 INFO L225 Difference]: With dead ends: 102 [2020-07-20 01:11:37,518 INFO L226 Difference]: Without dead ends: 98 [2020-07-20 01:11:37,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=180, Invalid=3480, Unknown=0, NotChecked=0, Total=3660 [2020-07-20 01:11:37,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-20 01:11:37,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 63. [2020-07-20 01:11:37,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-20 01:11:37,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-07-20 01:11:37,526 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 99 [2020-07-20 01:11:37,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:37,527 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-07-20 01:11:37,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-20 01:11:37,527 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-07-20 01:11:37,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-20 01:11:37,528 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:37,529 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:37,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-20 01:11:37,737 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:37,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:37,738 INFO L82 PathProgramCache]: Analyzing trace with hash -684135393, now seen corresponding path program 6 times [2020-07-20 01:11:37,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:37,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140890932] [2020-07-20 01:11:37,739 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:11:37,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:37,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:38,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:38,855 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-07-20 01:11:38,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140890932] [2020-07-20 01:11:38,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058954096] [2020-07-20 01:11:38,856 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36648069 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:38,909 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36648069 issued 4 check-sat command(s) [2020-07-20 01:11:38,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:38,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 92 conjunts are in the unsatisfiable core [2020-07-20 01:11:38,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:40,416 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:11:40,417 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:11:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-07-20 01:11:40,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:40,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 62 [2020-07-20 01:11:40,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016323823] [2020-07-20 01:11:40,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-07-20 01:11:40,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:40,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-07-20 01:11:40,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3632, Unknown=0, NotChecked=0, Total=3782 [2020-07-20 01:11:40,601 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 62 states. [2020-07-20 01:11:43,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:43,338 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-07-20 01:11:43,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-20 01:11:43,338 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 106 [2020-07-20 01:11:43,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:43,340 INFO L225 Difference]: With dead ends: 108 [2020-07-20 01:11:43,340 INFO L226 Difference]: Without dead ends: 104 [2020-07-20 01:11:43,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=290, Invalid=7720, Unknown=0, NotChecked=0, Total=8010 [2020-07-20 01:11:43,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-07-20 01:11:43,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 66. [2020-07-20 01:11:43,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 01:11:43,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-07-20 01:11:43,349 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 106 [2020-07-20 01:11:43,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:43,349 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-07-20 01:11:43,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-07-20 01:11:43,350 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-07-20 01:11:43,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-07-20 01:11:43,351 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:43,351 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:43,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-20 01:11:43,565 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:43,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:43,566 INFO L82 PathProgramCache]: Analyzing trace with hash -876959568, now seen corresponding path program 7 times [2020-07-20 01:11:43,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:43,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167003241] [2020-07-20 01:11:43,567 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:11:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:44,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-07-20 01:11:45,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167003241] [2020-07-20 01:11:45,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911979464] [2020-07-20 01:11:45,204 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@51bb86a1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:45,281 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@51bb86a1 issued 4 check-sat command(s) [2020-07-20 01:11:45,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:45,284 WARN L261 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 128 conjunts are in the unsatisfiable core [2020-07-20 01:11:45,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:45,437 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:11:45,437 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:11:45,624 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-07-20 01:11:45,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:45,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 39 [2020-07-20 01:11:45,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438384451] [2020-07-20 01:11:45,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-20 01:11:45,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:45,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-20 01:11:45,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1400, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 01:11:45,639 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 39 states. [2020-07-20 01:11:47,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:47,631 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2020-07-20 01:11:47,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 01:11:47,631 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 113 [2020-07-20 01:11:47,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:47,633 INFO L225 Difference]: With dead ends: 114 [2020-07-20 01:11:47,633 INFO L226 Difference]: Without dead ends: 110 [2020-07-20 01:11:47,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=204, Invalid=4488, Unknown=0, NotChecked=0, Total=4692 [2020-07-20 01:11:47,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-20 01:11:47,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 69. [2020-07-20 01:11:47,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 01:11:47,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-07-20 01:11:47,648 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 113 [2020-07-20 01:11:47,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:47,648 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-07-20 01:11:47,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-20 01:11:47,648 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-07-20 01:11:47,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-07-20 01:11:47,650 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:47,650 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:47,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-20 01:11:47,865 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:47,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:47,866 INFO L82 PathProgramCache]: Analyzing trace with hash -307419585, now seen corresponding path program 7 times [2020-07-20 01:11:47,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:47,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27988870] [2020-07-20 01:11:47,867 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:11:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:48,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-07-20 01:11:49,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27988870] [2020-07-20 01:11:49,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616725295] [2020-07-20 01:11:49,538 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2489814e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:49,604 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2489814e issued 4 check-sat command(s) [2020-07-20 01:11:49,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:49,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 104 conjunts are in the unsatisfiable core [2020-07-20 01:11:49,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:51,575 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:11:51,576 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:11:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-07-20 01:11:51,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:51,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 70 [2020-07-20 01:11:51,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138995632] [2020-07-20 01:11:51,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-07-20 01:11:51,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:51,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-07-20 01:11:51,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=4660, Unknown=0, NotChecked=0, Total=4830 [2020-07-20 01:11:51,783 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 70 states. [2020-07-20 01:11:55,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:55,061 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2020-07-20 01:11:55,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-20 01:11:55,061 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 120 [2020-07-20 01:11:55,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:55,062 INFO L225 Difference]: With dead ends: 120 [2020-07-20 01:11:55,063 INFO L226 Difference]: Without dead ends: 116 [2020-07-20 01:11:55,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=330, Invalid=9972, Unknown=0, NotChecked=0, Total=10302 [2020-07-20 01:11:55,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-20 01:11:55,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-07-20 01:11:55,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-20 01:11:55,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-07-20 01:11:55,070 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 120 [2020-07-20 01:11:55,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:55,070 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-07-20 01:11:55,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-07-20 01:11:55,071 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-07-20 01:11:55,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-07-20 01:11:55,071 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:55,072 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:55,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:55,275 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:55,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:55,275 INFO L82 PathProgramCache]: Analyzing trace with hash -873547948, now seen corresponding path program 8 times [2020-07-20 01:11:55,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:55,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381511033] [2020-07-20 01:11:55,276 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:11:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:55,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:55,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:55,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:56,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:56,845 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-07-20 01:11:56,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381511033] [2020-07-20 01:11:56,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215307014] [2020-07-20 01:11:56,846 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79e41d82 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:56,902 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79e41d82 issued 4 check-sat command(s) [2020-07-20 01:11:56,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:56,906 WARN L261 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 144 conjunts are in the unsatisfiable core [2020-07-20 01:11:56,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:57,095 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:11:57,098 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:11:57,276 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-07-20 01:11:57,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:57,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 43 [2020-07-20 01:11:57,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868186439] [2020-07-20 01:11:57,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-07-20 01:11:57,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:57,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-07-20 01:11:57,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1716, Unknown=0, NotChecked=0, Total=1806 [2020-07-20 01:11:57,278 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 43 states. [2020-07-20 01:11:59,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:59,711 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2020-07-20 01:11:59,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-20 01:11:59,712 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 127 [2020-07-20 01:11:59,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:59,713 INFO L225 Difference]: With dead ends: 126 [2020-07-20 01:11:59,713 INFO L226 Difference]: Without dead ends: 122 [2020-07-20 01:11:59,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=228, Invalid=5624, Unknown=0, NotChecked=0, Total=5852 [2020-07-20 01:11:59,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-20 01:11:59,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 75. [2020-07-20 01:11:59,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-20 01:11:59,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-07-20 01:11:59,720 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 127 [2020-07-20 01:11:59,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:59,721 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-07-20 01:11:59,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-07-20 01:11:59,721 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-07-20 01:11:59,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-07-20 01:11:59,722 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:59,722 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:59,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:59,927 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:59,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:59,928 INFO L82 PathProgramCache]: Analyzing trace with hash 178099167, now seen corresponding path program 8 times [2020-07-20 01:11:59,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:59,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476578630] [2020-07-20 01:11:59,929 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:11:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:00,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:00,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:00,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:00,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:01,726 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-07-20 01:12:01,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476578630] [2020-07-20 01:12:01,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657332559] [2020-07-20 01:12:01,727 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7576098c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:12:01,780 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7576098c issued 4 check-sat command(s) [2020-07-20 01:12:01,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:12:01,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 116 conjunts are in the unsatisfiable core [2020-07-20 01:12:01,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:12:04,368 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:12:04,369 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:12:04,595 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-07-20 01:12:04,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:12:04,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42] total 78 [2020-07-20 01:12:04,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339089354] [2020-07-20 01:12:04,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-07-20 01:12:04,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:12:04,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-07-20 01:12:04,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=5816, Unknown=0, NotChecked=0, Total=6006 [2020-07-20 01:12:04,603 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 78 states. [2020-07-20 01:12:08,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:12:08,882 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-07-20 01:12:08,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-20 01:12:08,882 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 134 [2020-07-20 01:12:08,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:12:08,883 INFO L225 Difference]: With dead ends: 132 [2020-07-20 01:12:08,883 INFO L226 Difference]: Without dead ends: 128 [2020-07-20 01:12:08,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=370, Invalid=12512, Unknown=0, NotChecked=0, Total=12882 [2020-07-20 01:12:08,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-20 01:12:08,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-07-20 01:12:08,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-20 01:12:08,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-07-20 01:12:08,897 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 134 [2020-07-20 01:12:08,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:12:08,898 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-07-20 01:12:08,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-07-20 01:12:08,898 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-07-20 01:12:08,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-07-20 01:12:08,900 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:12:08,901 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:12:09,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:12:09,116 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:12:09,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:12:09,117 INFO L82 PathProgramCache]: Analyzing trace with hash 273809272, now seen corresponding path program 9 times [2020-07-20 01:12:09,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:12:09,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362965437] [2020-07-20 01:12:09,118 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:12:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:09,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:09,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:10,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:10,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:10,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-07-20 01:12:11,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362965437] [2020-07-20 01:12:11,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612770375] [2020-07-20 01:12:11,300 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@67e1b4f8 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:12:11,353 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@67e1b4f8 issued 4 check-sat command(s) [2020-07-20 01:12:11,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:12:11,357 WARN L261 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 160 conjunts are in the unsatisfiable core [2020-07-20 01:12:11,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:12:11,573 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:12:11,573 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:12:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-07-20 01:12:11,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:12:11,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 47 [2020-07-20 01:12:11,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818845471] [2020-07-20 01:12:11,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-07-20 01:12:11,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:12:11,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-07-20 01:12:11,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=2064, Unknown=0, NotChecked=0, Total=2162 [2020-07-20 01:12:11,756 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 47 states. [2020-07-20 01:12:14,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:12:14,788 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2020-07-20 01:12:14,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-07-20 01:12:14,790 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 141 [2020-07-20 01:12:14,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:12:14,791 INFO L225 Difference]: With dead ends: 138 [2020-07-20 01:12:14,792 INFO L226 Difference]: Without dead ends: 134 [2020-07-20 01:12:14,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=252, Invalid=6888, Unknown=0, NotChecked=0, Total=7140 [2020-07-20 01:12:14,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-20 01:12:14,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 81. [2020-07-20 01:12:14,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-20 01:12:14,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-07-20 01:12:14,798 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 141 [2020-07-20 01:12:14,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:12:14,798 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-07-20 01:12:14,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-07-20 01:12:14,799 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-07-20 01:12:14,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-07-20 01:12:14,800 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:12:14,800 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:12:15,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-07-20 01:12:15,004 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:12:15,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:12:15,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1983154945, now seen corresponding path program 9 times [2020-07-20 01:12:15,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:12:15,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266760774] [2020-07-20 01:12:15,006 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:12:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:15,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:15,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:15,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:15,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:15,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:16,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:16,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-07-20 01:12:17,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266760774] [2020-07-20 01:12:17,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168724796] [2020-07-20 01:12:17,145 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28820a5b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:12:17,205 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28820a5b issued 4 check-sat command(s) [2020-07-20 01:12:17,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:12:17,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 128 conjunts are in the unsatisfiable core [2020-07-20 01:12:17,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:12:20,499 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:12:20,499 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:12:20,741 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-07-20 01:12:20,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:12:20,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46] total 86 [2020-07-20 01:12:20,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040431738] [2020-07-20 01:12:20,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-07-20 01:12:20,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:12:20,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-07-20 01:12:20,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=7100, Unknown=0, NotChecked=0, Total=7310 [2020-07-20 01:12:20,744 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 86 states. [2020-07-20 01:12:26,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:12:26,152 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2020-07-20 01:12:26,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-07-20 01:12:26,153 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 148 [2020-07-20 01:12:26,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:12:26,154 INFO L225 Difference]: With dead ends: 144 [2020-07-20 01:12:26,154 INFO L226 Difference]: Without dead ends: 140 [2020-07-20 01:12:26,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=410, Invalid=15340, Unknown=0, NotChecked=0, Total=15750 [2020-07-20 01:12:26,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-20 01:12:26,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 84. [2020-07-20 01:12:26,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-20 01:12:26,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-07-20 01:12:26,161 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 148 [2020-07-20 01:12:26,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:12:26,161 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-07-20 01:12:26,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-07-20 01:12:26,161 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-07-20 01:12:26,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-07-20 01:12:26,162 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:12:26,162 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:12:26,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-07-20 01:12:26,375 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:12:26,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:12:26,376 INFO L82 PathProgramCache]: Analyzing trace with hash -708738788, now seen corresponding path program 10 times [2020-07-20 01:12:26,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:12:26,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709593767] [2020-07-20 01:12:26,377 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:12:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:26,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:27,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:28,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:28,887 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-07-20 01:12:28,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709593767] [2020-07-20 01:12:28,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357428997] [2020-07-20 01:12:28,888 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@73f106b7 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:12:28,950 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@73f106b7 issued 4 check-sat command(s) [2020-07-20 01:12:28,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:12:28,954 WARN L261 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 176 conjunts are in the unsatisfiable core [2020-07-20 01:12:28,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:12:29,201 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:12:29,202 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:12:29,422 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-07-20 01:12:29,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:12:29,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 51 [2020-07-20 01:12:29,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176049906] [2020-07-20 01:12:29,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-07-20 01:12:29,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:12:29,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-07-20 01:12:29,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2444, Unknown=0, NotChecked=0, Total=2550 [2020-07-20 01:12:29,424 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 51 states. [2020-07-20 01:12:33,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:12:33,055 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2020-07-20 01:12:33,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-20 01:12:33,060 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 155 [2020-07-20 01:12:33,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:12:33,062 INFO L225 Difference]: With dead ends: 150 [2020-07-20 01:12:33,062 INFO L226 Difference]: Without dead ends: 146 [2020-07-20 01:12:33,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=276, Invalid=8280, Unknown=0, NotChecked=0, Total=8556 [2020-07-20 01:12:33,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-07-20 01:12:33,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 87. [2020-07-20 01:12:33,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-20 01:12:33,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-07-20 01:12:33,068 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 155 [2020-07-20 01:12:33,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:12:33,069 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-07-20 01:12:33,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-07-20 01:12:33,069 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-07-20 01:12:33,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-07-20 01:12:33,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:12:33,070 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:12:33,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-07-20 01:12:33,284 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:12:33,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:12:33,285 INFO L82 PathProgramCache]: Analyzing trace with hash -448788065, now seen corresponding path program 10 times [2020-07-20 01:12:33,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:12:33,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013276660] [2020-07-20 01:12:33,286 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:12:33,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:33,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:33,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:33,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:33,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:33,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:33,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:34,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:34,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:34,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:34,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:34,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:34,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:35,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2020-07-20 01:12:35,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013276660] [2020-07-20 01:12:35,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457202055] [2020-07-20 01:12:35,983 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f92c6fc No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:12:36,047 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f92c6fc issued 4 check-sat command(s) [2020-07-20 01:12:36,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:12:36,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 140 conjunts are in the unsatisfiable core [2020-07-20 01:12:36,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:12:40,067 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:12:40,068 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:12:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2020-07-20 01:12:40,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:12:40,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50] total 94 [2020-07-20 01:12:40,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470291810] [2020-07-20 01:12:40,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-07-20 01:12:40,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:12:40,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-07-20 01:12:40,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=8512, Unknown=0, NotChecked=0, Total=8742 [2020-07-20 01:12:40,349 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 94 states. [2020-07-20 01:12:46,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:12:46,685 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2020-07-20 01:12:46,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-07-20 01:12:46,686 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 162 [2020-07-20 01:12:46,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:12:46,687 INFO L225 Difference]: With dead ends: 156 [2020-07-20 01:12:46,688 INFO L226 Difference]: Without dead ends: 152 [2020-07-20 01:12:46,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1980 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=450, Invalid=18456, Unknown=0, NotChecked=0, Total=18906 [2020-07-20 01:12:46,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-20 01:12:46,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2020-07-20 01:12:46,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-20 01:12:46,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-07-20 01:12:46,694 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 162 [2020-07-20 01:12:46,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:12:46,695 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-07-20 01:12:46,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-07-20 01:12:46,695 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-07-20 01:12:46,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-07-20 01:12:46,697 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:12:46,697 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:12:46,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-07-20 01:12:46,904 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:12:46,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:12:46,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1407042496, now seen corresponding path program 11 times [2020-07-20 01:12:46,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:12:46,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408912781] [2020-07-20 01:12:46,906 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:12:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:47,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:47,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:47,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:47,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:48,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:48,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:48,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:48,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:49,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:49,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-07-20 01:12:49,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408912781] [2020-07-20 01:12:49,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238953841] [2020-07-20 01:12:49,818 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dd81d66 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:12:49,880 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dd81d66 issued 4 check-sat command(s) [2020-07-20 01:12:49,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:12:49,884 WARN L261 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 192 conjunts are in the unsatisfiable core [2020-07-20 01:12:49,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:12:50,153 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:12:50,154 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:12:50,386 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-07-20 01:12:50,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:12:50,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 55 [2020-07-20 01:12:50,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716188598] [2020-07-20 01:12:50,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-07-20 01:12:50,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:12:50,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-07-20 01:12:50,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=2856, Unknown=0, NotChecked=0, Total=2970 [2020-07-20 01:12:50,388 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 55 states. [2020-07-20 01:12:54,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:12:54,635 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2020-07-20 01:12:54,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-07-20 01:12:54,636 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 169 [2020-07-20 01:12:54,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:12:54,638 INFO L225 Difference]: With dead ends: 162 [2020-07-20 01:12:54,638 INFO L226 Difference]: Without dead ends: 158 [2020-07-20 01:12:54,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=300, Invalid=9800, Unknown=0, NotChecked=0, Total=10100 [2020-07-20 01:12:54,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-07-20 01:12:54,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 93. [2020-07-20 01:12:54,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-20 01:12:54,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2020-07-20 01:12:54,643 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 169 [2020-07-20 01:12:54,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:12:54,644 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2020-07-20 01:12:54,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-07-20 01:12:54,644 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2020-07-20 01:12:54,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-07-20 01:12:54,645 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:12:54,645 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:12:54,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-07-20 01:12:54,846 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:12:54,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:12:54,846 INFO L82 PathProgramCache]: Analyzing trace with hash 491557311, now seen corresponding path program 11 times [2020-07-20 01:12:54,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:12:54,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910260333] [2020-07-20 01:12:54,848 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:12:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:54,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:55,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:55,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:55,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:55,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:56,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:56,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:57,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2020-07-20 01:12:57,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910260333] [2020-07-20 01:12:57,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319001835] [2020-07-20 01:12:57,974 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@174398dd No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:12:58,037 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@174398dd issued 4 check-sat command(s) [2020-07-20 01:12:58,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:12:58,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 152 conjunts are in the unsatisfiable core [2020-07-20 01:12:58,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:13:02,906 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:13:02,907 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:13:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2020-07-20 01:13:03,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:13:03,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 102 [2020-07-20 01:13:03,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350156759] [2020-07-20 01:13:03,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-07-20 01:13:03,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:13:03,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-07-20 01:13:03,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=10052, Unknown=0, NotChecked=0, Total=10302 [2020-07-20 01:13:03,204 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 102 states. [2020-07-20 01:13:11,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:13:11,082 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2020-07-20 01:13:11,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-07-20 01:13:11,082 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 176 [2020-07-20 01:13:11,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:13:11,084 INFO L225 Difference]: With dead ends: 168 [2020-07-20 01:13:11,084 INFO L226 Difference]: Without dead ends: 164 [2020-07-20 01:13:11,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2449 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=490, Invalid=21860, Unknown=0, NotChecked=0, Total=22350 [2020-07-20 01:13:11,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-07-20 01:13:11,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 96. [2020-07-20 01:13:11,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-20 01:13:11,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-07-20 01:13:11,091 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 176 [2020-07-20 01:13:11,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:13:11,091 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-07-20 01:13:11,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-07-20 01:13:11,092 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-07-20 01:13:11,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-07-20 01:13:11,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:13:11,093 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:13:11,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:13:11,307 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:13:11,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:13:11,308 INFO L82 PathProgramCache]: Analyzing trace with hash 308359396, now seen corresponding path program 12 times [2020-07-20 01:13:11,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:13:11,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493743236] [2020-07-20 01:13:11,308 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:13:11,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:11,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:11,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:11,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:12,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:12,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:12,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:13,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:13,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:13,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:14,917 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2020-07-20 01:13:14,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493743236] [2020-07-20 01:13:14,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873266057] [2020-07-20 01:13:14,918 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@323b8f82 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:13:14,989 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@323b8f82 issued 4 check-sat command(s) [2020-07-20 01:13:14,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:13:14,994 WARN L261 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 208 conjunts are in the unsatisfiable core [2020-07-20 01:13:14,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:13:15,293 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:13:15,293 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:13:15,554 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2020-07-20 01:13:15,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:13:15,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 59 [2020-07-20 01:13:15,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054335783] [2020-07-20 01:13:15,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-07-20 01:13:15,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:13:15,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-07-20 01:13:15,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=3300, Unknown=0, NotChecked=0, Total=3422 [2020-07-20 01:13:15,556 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 59 states. [2020-07-20 01:13:20,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:13:20,888 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2020-07-20 01:13:20,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-07-20 01:13:20,892 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 183 [2020-07-20 01:13:20,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:13:20,893 INFO L225 Difference]: With dead ends: 174 [2020-07-20 01:13:20,894 INFO L226 Difference]: Without dead ends: 170 [2020-07-20 01:13:20,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=324, Invalid=11448, Unknown=0, NotChecked=0, Total=11772 [2020-07-20 01:13:20,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-07-20 01:13:20,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 99. [2020-07-20 01:13:20,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-20 01:13:20,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-07-20 01:13:20,900 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 183 [2020-07-20 01:13:20,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:13:20,900 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-07-20 01:13:20,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-07-20 01:13:20,901 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-07-20 01:13:20,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-20 01:13:20,902 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:13:20,902 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:13:21,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-07-20 01:13:21,114 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:13:21,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:13:21,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1601548961, now seen corresponding path program 12 times [2020-07-20 01:13:21,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:13:21,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334178783] [2020-07-20 01:13:21,115 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:13:21,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:21,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:21,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:22,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:23,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:24,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:24,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:24,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-07-20 01:13:25,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334178783] [2020-07-20 01:13:25,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009373265] [2020-07-20 01:13:25,201 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f8e0fe No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:13:25,275 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f8e0fe issued 4 check-sat command(s) [2020-07-20 01:13:25,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:13:25,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 164 conjunts are in the unsatisfiable core [2020-07-20 01:13:25,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:13:31,705 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:13:31,707 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:13:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-07-20 01:13:32,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:13:32,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 110 [2020-07-20 01:13:32,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570817200] [2020-07-20 01:13:32,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2020-07-20 01:13:32,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:13:32,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2020-07-20 01:13:32,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=11720, Unknown=0, NotChecked=0, Total=11990 [2020-07-20 01:13:32,033 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 110 states. [2020-07-20 01:13:40,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:13:40,884 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2020-07-20 01:13:40,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-07-20 01:13:40,884 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 190 [2020-07-20 01:13:40,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:13:40,885 INFO L225 Difference]: With dead ends: 180 [2020-07-20 01:13:40,886 INFO L226 Difference]: Without dead ends: 176 [2020-07-20 01:13:40,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 189 SyntacticMatches, 2 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=530, Invalid=25552, Unknown=0, NotChecked=0, Total=26082 [2020-07-20 01:13:40,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-07-20 01:13:40,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 102. [2020-07-20 01:13:40,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-20 01:13:40,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-07-20 01:13:40,893 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 190 [2020-07-20 01:13:40,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:13:40,893 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-07-20 01:13:40,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 110 states. [2020-07-20 01:13:40,893 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-07-20 01:13:40,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-07-20 01:13:40,894 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:13:40,894 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:13:41,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-07-20 01:13:41,096 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:13:41,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:13:41,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1837932792, now seen corresponding path program 13 times [2020-07-20 01:13:41,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:13:41,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331395394] [2020-07-20 01:13:41,097 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:13:41,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:41,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:41,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:42,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:42,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:43,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:45,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2020-07-20 01:13:45,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331395394] [2020-07-20 01:13:45,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708126715] [2020-07-20 01:13:45,358 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7a91fd5e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:13:45,429 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7a91fd5e issued 4 check-sat command(s) [2020-07-20 01:13:45,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:13:45,434 WARN L261 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 224 conjunts are in the unsatisfiable core [2020-07-20 01:13:45,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:13:45,788 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:13:45,789 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:13:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2020-07-20 01:13:46,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:13:46,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 63 [2020-07-20 01:13:46,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004216409] [2020-07-20 01:13:46,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-07-20 01:13:46,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:13:46,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-07-20 01:13:46,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=3776, Unknown=0, NotChecked=0, Total=3906 [2020-07-20 01:13:46,070 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 63 states. [2020-07-20 01:13:52,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:13:52,282 INFO L93 Difference]: Finished difference Result 186 states and 188 transitions. [2020-07-20 01:13:52,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-07-20 01:13:52,289 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 197 [2020-07-20 01:13:52,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:13:52,291 INFO L225 Difference]: With dead ends: 186 [2020-07-20 01:13:52,291 INFO L226 Difference]: Without dead ends: 182 [2020-07-20 01:13:52,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=348, Invalid=13224, Unknown=0, NotChecked=0, Total=13572 [2020-07-20 01:13:52,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-07-20 01:13:52,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 105. [2020-07-20 01:13:52,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-07-20 01:13:52,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2020-07-20 01:13:52,298 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 197 [2020-07-20 01:13:52,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:13:52,298 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2020-07-20 01:13:52,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-07-20 01:13:52,298 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2020-07-20 01:13:52,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-07-20 01:13:52,300 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:13:52,300 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:13:52,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:13:52,502 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:13:52,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:13:52,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1277526913, now seen corresponding path program 13 times [2020-07-20 01:13:52,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:13:52,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102891358] [2020-07-20 01:13:52,503 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:13:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:52,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:52,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:52,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:53,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:54,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:55,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:13:57,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-07-20 01:13:57,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102891358] [2020-07-20 01:13:57,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781127449] [2020-07-20 01:13:57,025 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1cc6e604 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:13:57,094 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1cc6e604 issued 4 check-sat command(s) [2020-07-20 01:13:57,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:13:57,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 176 conjunts are in the unsatisfiable core [2020-07-20 01:13:57,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:14:04,341 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:14:04,342 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:14:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-07-20 01:14:04,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:14:04,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 118 [2020-07-20 01:14:04,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433912823] [2020-07-20 01:14:04,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2020-07-20 01:14:04,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:14:04,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2020-07-20 01:14:04,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=13516, Unknown=0, NotChecked=0, Total=13806 [2020-07-20 01:14:04,715 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 118 states. [2020-07-20 01:14:15,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:14:15,699 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2020-07-20 01:14:15,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-07-20 01:14:15,699 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 204 [2020-07-20 01:14:15,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:14:15,701 INFO L225 Difference]: With dead ends: 192 [2020-07-20 01:14:15,701 INFO L226 Difference]: Without dead ends: 188 [2020-07-20 01:14:15,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 203 SyntacticMatches, 2 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3305 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=570, Invalid=29532, Unknown=0, NotChecked=0, Total=30102 [2020-07-20 01:14:15,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-07-20 01:14:15,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 108. [2020-07-20 01:14:15,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-20 01:14:15,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2020-07-20 01:14:15,708 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 204 [2020-07-20 01:14:15,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:14:15,709 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2020-07-20 01:14:15,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 118 states. [2020-07-20 01:14:15,709 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2020-07-20 01:14:15,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-07-20 01:14:15,710 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:14:15,710 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:14:15,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:14:15,924 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:14:15,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:14:15,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1565902508, now seen corresponding path program 14 times [2020-07-20 01:14:15,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:14:15,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909048001] [2020-07-20 01:14:15,926 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:14:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:16,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:16,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:17,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:17,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:18,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:19,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:20,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-07-20 01:14:21,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909048001] [2020-07-20 01:14:21,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786790920] [2020-07-20 01:14:21,281 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@57f69d04 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:14:21,355 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@57f69d04 issued 4 check-sat command(s) [2020-07-20 01:14:21,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:14:21,360 WARN L261 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 240 conjunts are in the unsatisfiable core [2020-07-20 01:14:21,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:14:21,736 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:14:21,736 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:14:22,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-07-20 01:14:22,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:14:22,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 67 [2020-07-20 01:14:22,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599805570] [2020-07-20 01:14:22,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-07-20 01:14:22,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:14:22,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-07-20 01:14:22,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=4284, Unknown=0, NotChecked=0, Total=4422 [2020-07-20 01:14:22,075 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 67 states. [2020-07-20 01:14:29,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:14:29,466 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2020-07-20 01:14:29,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-07-20 01:14:29,467 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 211 [2020-07-20 01:14:29,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:14:29,469 INFO L225 Difference]: With dead ends: 198 [2020-07-20 01:14:29,469 INFO L226 Difference]: Without dead ends: 194 [2020-07-20 01:14:29,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1951 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=372, Invalid=15128, Unknown=0, NotChecked=0, Total=15500 [2020-07-20 01:14:29,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-07-20 01:14:29,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 111. [2020-07-20 01:14:29,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-07-20 01:14:29,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2020-07-20 01:14:29,476 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 211 [2020-07-20 01:14:29,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:14:29,477 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2020-07-20 01:14:29,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-07-20 01:14:29,477 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2020-07-20 01:14:29,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-07-20 01:14:29,478 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:14:29,478 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:14:29,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-07-20 01:14:29,692 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:14:29,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:14:29,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1516658463, now seen corresponding path program 14 times [2020-07-20 01:14:29,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:14:29,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615374916] [2020-07-20 01:14:29,693 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:14:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:31,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:33,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:33,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:34,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:34,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:35,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-07-20 01:14:35,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615374916] [2020-07-20 01:14:35,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423228294] [2020-07-20 01:14:35,201 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@885dfaf No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:14:35,277 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@885dfaf issued 4 check-sat command(s) [2020-07-20 01:14:35,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:14:35,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 188 conjunts are in the unsatisfiable core [2020-07-20 01:14:35,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:14:44,179 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:14:44,180 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:14:44,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-07-20 01:14:44,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:14:44,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 126 [2020-07-20 01:14:44,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474758358] [2020-07-20 01:14:44,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2020-07-20 01:14:44,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:14:44,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2020-07-20 01:14:44,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=15440, Unknown=0, NotChecked=0, Total=15750 [2020-07-20 01:14:44,582 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 126 states. [2020-07-20 01:14:58,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:14:58,445 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2020-07-20 01:14:58,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-07-20 01:14:58,445 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 218 [2020-07-20 01:14:58,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:14:58,447 INFO L225 Difference]: With dead ends: 204 [2020-07-20 01:14:58,447 INFO L226 Difference]: Without dead ends: 200 [2020-07-20 01:14:58,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 217 SyntacticMatches, 2 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3781 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=610, Invalid=33800, Unknown=0, NotChecked=0, Total=34410 [2020-07-20 01:14:58,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-07-20 01:14:58,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 114. [2020-07-20 01:14:58,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-07-20 01:14:58,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-07-20 01:14:58,455 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 218 [2020-07-20 01:14:58,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:14:58,456 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-07-20 01:14:58,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 126 states. [2020-07-20 01:14:58,456 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-07-20 01:14:58,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-07-20 01:14:58,457 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:14:58,457 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:14:58,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:14:58,673 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:14:58,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:14:58,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1728931792, now seen corresponding path program 15 times [2020-07-20 01:14:58,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:14:58,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061626559] [2020-07-20 01:14:58,674 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:14:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:59,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:59,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:14:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:00,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:00,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:01,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:02,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:03,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:04,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:05,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2020-07-20 01:15:05,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061626559] [2020-07-20 01:15:05,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629755486] [2020-07-20 01:15:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@166d9bfc No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:15:05,280 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@166d9bfc issued 4 check-sat command(s) [2020-07-20 01:15:05,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:15:05,285 WARN L261 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 256 conjunts are in the unsatisfiable core [2020-07-20 01:15:05,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:15:05,764 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:15:05,765 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:15:06,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2020-07-20 01:15:06,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:15:06,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 71 [2020-07-20 01:15:06,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304122163] [2020-07-20 01:15:06,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-07-20 01:15:06,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:15:06,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-07-20 01:15:06,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=4824, Unknown=0, NotChecked=0, Total=4970 [2020-07-20 01:15:06,138 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 71 states. [2020-07-20 01:15:15,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:15:15,623 INFO L93 Difference]: Finished difference Result 210 states and 212 transitions. [2020-07-20 01:15:15,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-07-20 01:15:15,624 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 225 [2020-07-20 01:15:15,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:15:15,626 INFO L225 Difference]: With dead ends: 210 [2020-07-20 01:15:15,627 INFO L226 Difference]: Without dead ends: 206 [2020-07-20 01:15:15,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 284 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2209 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=396, Invalid=17160, Unknown=0, NotChecked=0, Total=17556 [2020-07-20 01:15:15,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-07-20 01:15:15,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 117. [2020-07-20 01:15:15,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-07-20 01:15:15,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2020-07-20 01:15:15,634 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 225 [2020-07-20 01:15:15,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:15:15,634 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2020-07-20 01:15:15,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-07-20 01:15:15,635 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2020-07-20 01:15:15,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-07-20 01:15:15,636 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:15:15,636 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:15:15,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-07-20 01:15:15,851 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:15:15,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:15:15,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1113639617, now seen corresponding path program 15 times [2020-07-20 01:15:15,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:15:15,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219820994] [2020-07-20 01:15:15,853 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:15:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:16,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:17,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:17,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:17,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:18,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:19,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:21,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2020-07-20 01:15:22,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219820994] [2020-07-20 01:15:22,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593394169] [2020-07-20 01:15:22,751 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@606e86c7 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:15:22,836 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@606e86c7 issued 4 check-sat command(s) [2020-07-20 01:15:22,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:15:22,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 200 conjunts are in the unsatisfiable core [2020-07-20 01:15:22,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:15:33,933 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:15:33,934 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:15:34,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2020-07-20 01:15:34,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:15:34,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 134 [2020-07-20 01:15:34,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25945133] [2020-07-20 01:15:34,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2020-07-20 01:15:34,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:15:34,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2020-07-20 01:15:34,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=17492, Unknown=0, NotChecked=0, Total=17822 [2020-07-20 01:15:34,450 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand 134 states. [2020-07-20 01:15:52,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:15:52,129 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2020-07-20 01:15:52,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-07-20 01:15:52,129 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 232 [2020-07-20 01:15:52,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:15:52,131 INFO L225 Difference]: With dead ends: 216 [2020-07-20 01:15:52,131 INFO L226 Difference]: Without dead ends: 212 [2020-07-20 01:15:52,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 231 SyntacticMatches, 2 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4289 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=650, Invalid=38356, Unknown=0, NotChecked=0, Total=39006 [2020-07-20 01:15:52,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-07-20 01:15:52,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 120. [2020-07-20 01:15:52,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-20 01:15:52,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2020-07-20 01:15:52,139 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 232 [2020-07-20 01:15:52,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:15:52,140 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2020-07-20 01:15:52,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 134 states. [2020-07-20 01:15:52,140 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2020-07-20 01:15:52,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-07-20 01:15:52,141 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:15:52,142 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:15:52,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:15:52,357 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:15:52,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:15:52,358 INFO L82 PathProgramCache]: Analyzing trace with hash 44515956, now seen corresponding path program 16 times [2020-07-20 01:15:52,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:15:52,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020210422] [2020-07-20 01:15:52,358 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:15:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:53,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:55,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:56,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:57,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:15:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:00,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2020-07-20 01:16:00,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020210422] [2020-07-20 01:16:00,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794835739] [2020-07-20 01:16:00,460 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@411636 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:16:00,546 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@411636 issued 4 check-sat command(s) [2020-07-20 01:16:00,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:16:00,552 WARN L261 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 272 conjunts are in the unsatisfiable core [2020-07-20 01:16:00,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:16:01,246 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:16:01,247 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:16:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2020-07-20 01:16:01,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:16:01,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 75 [2020-07-20 01:16:01,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335474949] [2020-07-20 01:16:01,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-07-20 01:16:01,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:16:01,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-07-20 01:16:01,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=5396, Unknown=0, NotChecked=0, Total=5550 [2020-07-20 01:16:01,887 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 75 states. [2020-07-20 01:16:13,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:16:13,717 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2020-07-20 01:16:13,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-07-20 01:16:13,718 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 239 [2020-07-20 01:16:13,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:16:13,720 INFO L225 Difference]: With dead ends: 222 [2020-07-20 01:16:13,721 INFO L226 Difference]: Without dead ends: 218 [2020-07-20 01:16:13,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=420, Invalid=19320, Unknown=0, NotChecked=0, Total=19740 [2020-07-20 01:16:13,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-07-20 01:16:13,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 123. [2020-07-20 01:16:13,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-07-20 01:16:13,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2020-07-20 01:16:13,728 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 239 [2020-07-20 01:16:13,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:16:13,729 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2020-07-20 01:16:13,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-07-20 01:16:13,729 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2020-07-20 01:16:13,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-07-20 01:16:13,730 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:16:13,730 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:16:13,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-07-20 01:16:13,944 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:16:13,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:16:13,945 INFO L82 PathProgramCache]: Analyzing trace with hash 356400863, now seen corresponding path program 16 times [2020-07-20 01:16:13,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:16:13,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190831082] [2020-07-20 01:16:13,946 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:16:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:14,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:14,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:15,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:16,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:16,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:16,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:19,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:21,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:21,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2020-07-20 01:16:22,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190831082] [2020-07-20 01:16:22,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889477113] [2020-07-20 01:16:22,435 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5aae8817 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:16:22,515 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5aae8817 issued 4 check-sat command(s) [2020-07-20 01:16:22,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:16:22,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 212 conjunts are in the unsatisfiable core [2020-07-20 01:16:22,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:16:36,617 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:16:36,618 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:16:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2020-07-20 01:16:37,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:16:37,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 74] total 142 [2020-07-20 01:16:37,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299996058] [2020-07-20 01:16:37,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2020-07-20 01:16:37,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:16:37,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2020-07-20 01:16:37,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=19672, Unknown=0, NotChecked=0, Total=20022 [2020-07-20 01:16:37,181 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 142 states. [2020-07-20 01:16:58,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:16:58,459 INFO L93 Difference]: Finished difference Result 228 states and 230 transitions. [2020-07-20 01:16:58,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-07-20 01:16:58,460 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 246 [2020-07-20 01:16:58,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:16:58,461 INFO L225 Difference]: With dead ends: 228 [2020-07-20 01:16:58,461 INFO L226 Difference]: Without dead ends: 224 [2020-07-20 01:16:58,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 245 SyntacticMatches, 2 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4692 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=690, Invalid=43200, Unknown=0, NotChecked=0, Total=43890 [2020-07-20 01:16:58,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-07-20 01:16:58,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 126. [2020-07-20 01:16:58,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-07-20 01:16:58,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2020-07-20 01:16:58,470 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 246 [2020-07-20 01:16:58,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:16:58,471 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2020-07-20 01:16:58,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 142 states. [2020-07-20 01:16:58,471 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2020-07-20 01:16:58,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-07-20 01:16:58,474 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:16:58,474 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:16:58,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-07-20 01:16:58,689 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:16:58,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:16:58,690 INFO L82 PathProgramCache]: Analyzing trace with hash -29862248, now seen corresponding path program 17 times [2020-07-20 01:16:58,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:16:58,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699808780] [2020-07-20 01:16:58,690 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:16:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:59,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:16:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:00,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:01,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:02,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:02,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:02,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:04,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:04,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:05,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:05,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:06,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1989 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 1139 trivial. 0 not checked. [2020-07-20 01:17:08,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699808780] [2020-07-20 01:17:08,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898380711] [2020-07-20 01:17:08,261 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@33c001b5 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:17:08,360 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@33c001b5 issued 4 check-sat command(s) [2020-07-20 01:17:08,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:17:08,368 WARN L261 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 288 conjunts are in the unsatisfiable core [2020-07-20 01:17:08,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:17:09,010 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:17:09,011 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:17:09,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1989 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 1139 trivial. 0 not checked. [2020-07-20 01:17:09,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:17:09,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 79 [2020-07-20 01:17:09,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804770994] [2020-07-20 01:17:09,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-07-20 01:17:09,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:17:09,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-07-20 01:17:09,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=6000, Unknown=0, NotChecked=0, Total=6162 [2020-07-20 01:17:09,525 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 79 states. [2020-07-20 01:17:24,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:17:24,657 INFO L93 Difference]: Finished difference Result 234 states and 236 transitions. [2020-07-20 01:17:24,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-07-20 01:17:24,658 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 253 [2020-07-20 01:17:24,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:17:24,660 INFO L225 Difference]: With dead ends: 234 [2020-07-20 01:17:24,661 INFO L226 Difference]: Without dead ends: 230 [2020-07-20 01:17:24,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 320 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2773 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=444, Invalid=21608, Unknown=0, NotChecked=0, Total=22052 [2020-07-20 01:17:24,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-07-20 01:17:24,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 129. [2020-07-20 01:17:24,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-07-20 01:17:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2020-07-20 01:17:24,668 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 253 [2020-07-20 01:17:24,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:17:24,669 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2020-07-20 01:17:24,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-07-20 01:17:24,669 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2020-07-20 01:17:24,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-07-20 01:17:24,670 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:17:24,670 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:17:24,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-07-20 01:17:24,884 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:17:24,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:17:24,885 INFO L82 PathProgramCache]: Analyzing trace with hash 256162815, now seen corresponding path program 17 times [2020-07-20 01:17:24,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:17:24,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534038233] [2020-07-20 01:17:24,886 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:17:24,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:25,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:25,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:26,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:26,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:26,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:29,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:31,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:32,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:33,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:17:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 0 proven. 901 refuted. 0 times theorem prover too weak. 1207 trivial. 0 not checked. [2020-07-20 01:17:35,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534038233] [2020-07-20 01:17:35,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086261073] [2020-07-20 01:17:35,225 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3de14000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:17:35,309 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3de14000 issued 4 check-sat command(s) [2020-07-20 01:17:35,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:17:35,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 224 conjunts are in the unsatisfiable core [2020-07-20 01:17:35,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:17:53,370 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:17:53,371 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:17:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 0 proven. 901 refuted. 0 times theorem prover too weak. 1207 trivial. 0 not checked. [2020-07-20 01:17:54,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:17:54,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 150 [2020-07-20 01:17:54,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383255918] [2020-07-20 01:17:54,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2020-07-20 01:17:54,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:17:54,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2020-07-20 01:17:54,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=21980, Unknown=0, NotChecked=0, Total=22350 [2020-07-20 01:17:54,080 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 150 states. [2020-07-20 01:18:23,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:18:23,346 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2020-07-20 01:18:23,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-07-20 01:18:23,347 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 260 [2020-07-20 01:18:23,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:18:23,348 INFO L225 Difference]: With dead ends: 240 [2020-07-20 01:18:23,348 INFO L226 Difference]: Without dead ends: 236 [2020-07-20 01:18:23,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 259 SyntacticMatches, 2 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5401 ImplicationChecksByTransitivity, 43.4s TimeCoverageRelationStatistics Valid=730, Invalid=48332, Unknown=0, NotChecked=0, Total=49062 [2020-07-20 01:18:23,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-07-20 01:18:23,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 132. [2020-07-20 01:18:23,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-07-20 01:18:23,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2020-07-20 01:18:23,357 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 260 [2020-07-20 01:18:23,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:18:23,357 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2020-07-20 01:18:23,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 150 states. [2020-07-20 01:18:23,358 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2020-07-20 01:18:23,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-07-20 01:18:23,359 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:18:23,359 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:18:23,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-07-20 01:18:23,573 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:18:23,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:18:23,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1054712892, now seen corresponding path program 18 times [2020-07-20 01:18:23,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:18:23,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015474707] [2020-07-20 01:18:23,575 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:18:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:23,772 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2020-07-20 01:18:23,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:23,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:24,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:25,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:26,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:27,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:28,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:29,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:29,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:34,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:34,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:35,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2020-07-20 01:18:35,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015474707] [2020-07-20 01:18:35,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379520812] [2020-07-20 01:18:35,778 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@84bacd No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:18:35,863 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@84bacd issued 4 check-sat command(s) [2020-07-20 01:18:35,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:18:35,868 WARN L261 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 304 conjunts are in the unsatisfiable core [2020-07-20 01:18:35,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:18:36,615 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:18:36,616 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:18:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2020-07-20 01:18:37,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:18:37,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 83 [2020-07-20 01:18:37,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019257892] [2020-07-20 01:18:37,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-07-20 01:18:37,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:18:37,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-07-20 01:18:37,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=6636, Unknown=0, NotChecked=0, Total=6806 [2020-07-20 01:18:37,266 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand 83 states. [2020-07-20 01:18:58,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:18:58,174 INFO L93 Difference]: Finished difference Result 246 states and 248 transitions. [2020-07-20 01:18:58,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-07-20 01:18:58,179 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 267 [2020-07-20 01:18:58,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:18:58,180 INFO L225 Difference]: With dead ends: 246 [2020-07-20 01:18:58,180 INFO L226 Difference]: Without dead ends: 242 [2020-07-20 01:18:58,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3079 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=468, Invalid=24024, Unknown=0, NotChecked=0, Total=24492 [2020-07-20 01:18:58,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-07-20 01:18:58,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 135. [2020-07-20 01:18:58,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-07-20 01:18:58,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2020-07-20 01:18:58,187 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 267 [2020-07-20 01:18:58,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:18:58,187 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2020-07-20 01:18:58,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-07-20 01:18:58,188 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2020-07-20 01:18:58,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-07-20 01:18:58,189 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:18:58,189 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:18:58,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-07-20 01:18:58,403 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:18:58,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:18:58,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1208226657, now seen corresponding path program 18 times [2020-07-20 01:18:58,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:18:58,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048272316] [2020-07-20 01:18:58,404 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:18:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:58,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:58,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:59,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:59,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:59,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:18:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:00,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:01,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:03,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:03,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:06,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:07,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:19:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2358 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2020-07-20 01:19:11,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048272316] [2020-07-20 01:19:11,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133751935] [2020-07-20 01:19:11,610 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d21aca8 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:19:11,702 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d21aca8 issued 4 check-sat command(s) [2020-07-20 01:19:11,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:19:11,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 236 conjunts are in the unsatisfiable core [2020-07-20 01:19:11,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:19:36,055 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:19:36,056 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:19:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2358 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2020-07-20 01:19:36,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:19:36,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 158 [2020-07-20 01:19:36,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286654608] [2020-07-20 01:19:36,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2020-07-20 01:19:36,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:19:36,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2020-07-20 01:19:36,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=24416, Unknown=0, NotChecked=0, Total=24806 [2020-07-20 01:19:36,950 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand 158 states. [2020-07-20 01:20:18,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:20:18,868 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2020-07-20 01:20:18,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-07-20 01:20:18,869 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 274 [2020-07-20 01:20:18,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:20:18,871 INFO L225 Difference]: With dead ends: 252 [2020-07-20 01:20:18,871 INFO L226 Difference]: Without dead ends: 248 [2020-07-20 01:20:18,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 273 SyntacticMatches, 2 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6005 ImplicationChecksByTransitivity, 59.3s TimeCoverageRelationStatistics Valid=770, Invalid=53752, Unknown=0, NotChecked=0, Total=54522 [2020-07-20 01:20:18,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-07-20 01:20:18,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 138. [2020-07-20 01:20:18,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-07-20 01:20:18,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2020-07-20 01:20:18,880 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 274 [2020-07-20 01:20:18,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:20:18,880 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2020-07-20 01:20:18,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 158 states. [2020-07-20 01:20:18,880 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2020-07-20 01:20:18,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-07-20 01:20:18,882 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:20:18,882 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:20:19,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-07-20 01:20:19,097 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:20:19,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:20:19,098 INFO L82 PathProgramCache]: Analyzing trace with hash -591647904, now seen corresponding path program 19 times [2020-07-20 01:20:19,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:20:19,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186825158] [2020-07-20 01:20:19,099 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:20:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:19,349 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2020-07-20 01:20:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:20,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:20,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:21,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:23,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:24,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:26,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:26,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:29,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:30,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:20:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2489 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 1425 trivial. 0 not checked. [2020-07-20 01:20:35,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186825158] [2020-07-20 01:20:35,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993675082] [2020-07-20 01:20:35,494 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71168823 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:20:35,584 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71168823 issued 4 check-sat command(s) [2020-07-20 01:20:35,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:20:35,590 WARN L261 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 320 conjunts are in the unsatisfiable core [2020-07-20 01:20:35,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:20:36,641 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:20:36,641 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:20:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2489 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 1425 trivial. 0 not checked. [2020-07-20 01:20:37,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:20:37,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 87 [2020-07-20 01:20:37,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431656254] [2020-07-20 01:20:37,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-07-20 01:20:37,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:20:37,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-07-20 01:20:37,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=7304, Unknown=0, NotChecked=0, Total=7482 [2020-07-20 01:20:37,435 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand 87 states. [2020-07-20 01:21:06,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:21:06,212 INFO L93 Difference]: Finished difference Result 258 states and 260 transitions. [2020-07-20 01:21:06,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-07-20 01:21:06,214 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 281 [2020-07-20 01:21:06,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:21:06,216 INFO L225 Difference]: With dead ends: 258 [2020-07-20 01:21:06,216 INFO L226 Difference]: Without dead ends: 254 [2020-07-20 01:21:06,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 356 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3401 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=492, Invalid=26568, Unknown=0, NotChecked=0, Total=27060 [2020-07-20 01:21:06,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-07-20 01:21:06,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 141. [2020-07-20 01:21:06,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-07-20 01:21:06,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2020-07-20 01:21:06,225 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 281 [2020-07-20 01:21:06,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:21:06,225 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2020-07-20 01:21:06,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-07-20 01:21:06,225 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2020-07-20 01:21:06,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-07-20 01:21:06,227 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:21:06,227 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:21:06,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-07-20 01:21:06,443 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:21:06,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:21:06,443 INFO L82 PathProgramCache]: Analyzing trace with hash -504033089, now seen corresponding path program 19 times [2020-07-20 01:21:06,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:21:06,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065426838] [2020-07-20 01:21:06,444 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:21:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:06,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:06,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:07,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:07,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:07,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:07,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:08,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:10,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:11,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:12,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:13,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:14,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:15,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:17,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:20,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:21,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:21:23,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2622 backedges. 0 proven. 1121 refuted. 0 times theorem prover too weak. 1501 trivial. 0 not checked. [2020-07-20 01:21:23,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065426838] [2020-07-20 01:21:23,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430217602] [2020-07-20 01:21:23,080 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@18da6144 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:21:23,172 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@18da6144 issued 4 check-sat command(s) [2020-07-20 01:21:23,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:21:23,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 248 conjunts are in the unsatisfiable core [2020-07-20 01:21:23,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:21:55,099 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:21:55,100 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:21:56,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2622 backedges. 0 proven. 1121 refuted. 0 times theorem prover too weak. 1501 trivial. 0 not checked. [2020-07-20 01:21:56,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:21:56,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 166 [2020-07-20 01:21:56,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875777474] [2020-07-20 01:21:56,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2020-07-20 01:21:56,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:21:56,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2020-07-20 01:21:56,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=26980, Unknown=0, NotChecked=0, Total=27390 [2020-07-20 01:21:56,187 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 166 states. [2020-07-20 01:22:53,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:22:53,812 INFO L93 Difference]: Finished difference Result 264 states and 266 transitions. [2020-07-20 01:22:53,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-07-20 01:22:53,812 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 288 [2020-07-20 01:22:53,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:22:53,814 INFO L225 Difference]: With dead ends: 264 [2020-07-20 01:22:53,814 INFO L226 Difference]: Without dead ends: 260 [2020-07-20 01:22:53,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 287 SyntacticMatches, 2 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6641 ImplicationChecksByTransitivity, 78.2s TimeCoverageRelationStatistics Valid=810, Invalid=59460, Unknown=0, NotChecked=0, Total=60270 [2020-07-20 01:22:53,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-07-20 01:22:53,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 144. [2020-07-20 01:22:53,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-20 01:22:53,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2020-07-20 01:22:53,823 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 288 [2020-07-20 01:22:53,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:22:53,824 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2020-07-20 01:22:53,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 166 states. [2020-07-20 01:22:53,824 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2020-07-20 01:22:53,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-07-20 01:22:53,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:22:53,826 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:22:54,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:22:54,040 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:22:54,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:22:54,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1090458620, now seen corresponding path program 20 times [2020-07-20 01:22:54,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:22:54,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816054628] [2020-07-20 01:22:54,042 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:22:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:54,405 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2020-07-20 01:22:54,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:55,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:56,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:58,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:59,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:22:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:00,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:00,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:01,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:05,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:06,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:11,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:14,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:23:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 1580 trivial. 0 not checked. [2020-07-20 01:23:18,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816054628] [2020-07-20 01:23:18,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77528769] [2020-07-20 01:23:18,590 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6c30b830 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:23:18,686 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6c30b830 issued 4 check-sat command(s) [2020-07-20 01:23:18,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:23:18,692 WARN L261 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 336 conjunts are in the unsatisfiable core [2020-07-20 01:23:18,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:23:20,121 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:23:20,122 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:23:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 1580 trivial. 0 not checked. [2020-07-20 01:23:21,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:23:21,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 91 [2020-07-20 01:23:21,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806183389] [2020-07-20 01:23:21,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-07-20 01:23:21,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:23:21,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-07-20 01:23:21,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=8004, Unknown=0, NotChecked=0, Total=8190 [2020-07-20 01:23:21,251 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand 91 states. [2020-07-20 01:24:03,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:24:03,924 INFO L93 Difference]: Finished difference Result 270 states and 272 transitions. [2020-07-20 01:24:03,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-07-20 01:24:03,930 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 295 [2020-07-20 01:24:03,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:24:03,932 INFO L225 Difference]: With dead ends: 270 [2020-07-20 01:24:03,932 INFO L226 Difference]: Without dead ends: 266 [2020-07-20 01:24:03,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 374 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3739 ImplicationChecksByTransitivity, 45.0s TimeCoverageRelationStatistics Valid=516, Invalid=29240, Unknown=0, NotChecked=0, Total=29756 [2020-07-20 01:24:03,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-07-20 01:24:03,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 147. [2020-07-20 01:24:03,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-20 01:24:03,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2020-07-20 01:24:03,941 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 295 [2020-07-20 01:24:03,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:24:03,941 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2020-07-20 01:24:03,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-07-20 01:24:03,941 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2020-07-20 01:24:03,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-07-20 01:24:03,943 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:24:03,943 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:24:04,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-07-20 01:24:04,157 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:24:04,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:24:04,158 INFO L82 PathProgramCache]: Analyzing trace with hash 235497567, now seen corresponding path program 20 times [2020-07-20 01:24:04,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:24:04,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363979082] [2020-07-20 01:24:04,159 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52cfc462 [2020-07-20 01:24:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:04,357 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2020-07-20 01:24:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:04,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:05,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:05,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:07,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:10,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:11,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:11,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:11,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:12,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:13,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:14,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:15,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:16,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:16,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:17,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:20,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:20,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:21,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:22,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:22,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:24:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat