/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:43:40,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:43:40,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:43:40,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:43:40,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:43:40,213 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:43:40,217 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:43:40,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:43:40,240 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:43:40,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:43:40,245 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:43:40,247 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:43:40,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:43:40,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:43:40,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:43:40,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:43:40,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:43:40,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:43:40,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:43:40,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:43:40,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:43:40,288 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:43:40,289 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:43:40,290 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:43:40,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:43:40,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:43:40,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:43:40,314 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:43:40,315 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 [2020-07-21 01:43:40,360 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:43:40,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:43:40,366 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:43:40,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:43:40,369 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:43:40,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:43:40,370 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:43:40,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:43:40,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:43:40,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:43:40,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:43:40,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:43:40,375 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:43:40,375 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:43:40,375 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:43:40,375 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:43:40,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:43:40,376 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:43:40,376 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:43:40,376 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:43:40,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:43:40,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:43:40,379 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:43:40,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:43:40,380 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:43:40,380 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:43:40,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:43:40,380 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:43:40,381 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:43:40,381 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 01:43:40,763 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:43:40,790 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:43:40,796 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:43:40,798 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:43:40,800 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:43:40,803 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c [2020-07-21 01:43:40,890 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd1f205ff/138859a1c483477ea2e9edf054d72bc9/FLAG5bc1eaa22 [2020-07-21 01:43:41,515 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:43:41,516 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/const_1-1.c [2020-07-21 01:43:41,530 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd1f205ff/138859a1c483477ea2e9edf054d72bc9/FLAG5bc1eaa22 [2020-07-21 01:43:41,826 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd1f205ff/138859a1c483477ea2e9edf054d72bc9 [2020-07-21 01:43:41,838 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:43:41,841 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:43:41,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:43:41,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:43:41,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:43:41,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:43:41" (1/1) ... [2020-07-21 01:43:41,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@506a7cf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:41, skipping insertion in model container [2020-07-21 01:43:41,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:43:41" (1/1) ... [2020-07-21 01:43:41,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:43:41,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:43:42,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:43:42,075 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:43:42,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:43:42,108 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:43:42,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:42 WrapperNode [2020-07-21 01:43:42,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:43:42,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:43:42,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:43:42,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:43:42,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:42" (1/1) ... [2020-07-21 01:43:42,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:42" (1/1) ... [2020-07-21 01:43:42,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:42" (1/1) ... [2020-07-21 01:43:42,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:42" (1/1) ... [2020-07-21 01:43:42,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:42" (1/1) ... [2020-07-21 01:43:42,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:42" (1/1) ... [2020-07-21 01:43:42,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:42" (1/1) ... [2020-07-21 01:43:42,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:43:42,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:43:42,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:43:42,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:43:42,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:42" (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 [2020-07-21 01:43:42,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:43:42,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:43:42,335 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 01:43:42,335 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:43:42,335 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:43:42,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:43:42,336 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:43:42,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:43:42,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:43:42,563 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:43:42,564 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 01:43:42,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:43:42 BoogieIcfgContainer [2020-07-21 01:43:42,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:43:42,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:43:42,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:43:42,578 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:43:42,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:43:41" (1/3) ... [2020-07-21 01:43:42,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20329f83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:43:42, skipping insertion in model container [2020-07-21 01:43:42,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:42" (2/3) ... [2020-07-21 01:43:42,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20329f83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:43:42, skipping insertion in model container [2020-07-21 01:43:42,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:43:42" (3/3) ... [2020-07-21 01:43:42,585 INFO L109 eAbstractionObserver]: Analyzing ICFG const_1-1.c [2020-07-21 01:43:42,602 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:43:42,611 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:43:42,632 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:43:42,667 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:43:42,668 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:43:42,668 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:43:42,668 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:43:42,668 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:43:42,668 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:43:42,669 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:43:42,669 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:43:42,697 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-07-21 01:43:42,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 01:43:42,704 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:43:42,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:43:42,707 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:43:42,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:43:42,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2020-07-21 01:43:42,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:43:42,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096964538] [2020-07-21 01:43:42,724 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:43:42,814 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:43:42,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:43:42,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:43:42,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:43:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:43:42,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:43:42,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096964538] [2020-07-21 01:43:42,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:43:42,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:43:42,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817015832] [2020-07-21 01:43:42,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:43:42,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:43:42,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:43:42,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:43:42,958 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-07-21 01:43:43,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:43:43,043 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-21 01:43:43,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:43:43,046 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-21 01:43:43,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:43:43,055 INFO L225 Difference]: With dead ends: 29 [2020-07-21 01:43:43,056 INFO L226 Difference]: Without dead ends: 12 [2020-07-21 01:43:43,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:43:43,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-07-21 01:43:43,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-07-21 01:43:43,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-07-21 01:43:43,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-07-21 01:43:43,110 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-07-21 01:43:43,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:43:43,111 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-07-21 01:43:43,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:43:43,111 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-07-21 01:43:43,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 01:43:43,112 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:43:43,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:43:43,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:43:43,327 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:43:43,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:43:43,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2020-07-21 01:43:43,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:43:43,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323774557] [2020-07-21 01:43:43,329 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:43:43,368 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:43:43,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:43:43,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 01:43:43,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:43:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:43:43,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:43:43,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:43:43,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323774557] [2020-07-21 01:43:43,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:43:43,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 01:43:43,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855372878] [2020-07-21 01:43:43,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 01:43:43,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:43:43,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 01:43:43,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:43:43,478 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2020-07-21 01:43:43,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:43:43,586 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-07-21 01:43:43,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 01:43:43,588 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-07-21 01:43:43,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:43:43,590 INFO L225 Difference]: With dead ends: 20 [2020-07-21 01:43:43,590 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 01:43:43,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:43:43,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 01:43:43,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 01:43:43,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 01:43:43,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-21 01:43:43,597 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2020-07-21 01:43:43,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:43:43,598 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-21 01:43:43,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 01:43:43,599 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-21 01:43:43,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 01:43:43,600 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:43:43,600 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:43:43,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:43:43,814 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:43:43,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:43:43,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 2 times [2020-07-21 01:43:43,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:43:43,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562498470] [2020-07-21 01:43:43,818 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:43:43,855 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:43:43,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:43:43,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 01:43:43,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:43:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:43:43,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:43:46,145 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:43:46,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562498470] [2020-07-21 01:43:46,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:43:46,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 01:43:46,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056602201] [2020-07-21 01:43:46,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 01:43:46,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:43:46,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 01:43:46,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=85, Unknown=1, NotChecked=0, Total=132 [2020-07-21 01:43:46,150 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2020-07-21 01:43:46,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:43:46,744 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2020-07-21 01:43:46,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 01:43:46,745 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-07-21 01:43:46,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:43:46,746 INFO L225 Difference]: With dead ends: 26 [2020-07-21 01:43:46,746 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 01:43:46,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=94, Invalid=145, Unknown=1, NotChecked=0, Total=240 [2020-07-21 01:43:46,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 01:43:46,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 01:43:46,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 01:43:46,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-07-21 01:43:46,756 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2020-07-21 01:43:46,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:43:46,756 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-07-21 01:43:46,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 01:43:46,757 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-07-21 01:43:46,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 01:43:46,758 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:43:46,758 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:43:46,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:43:46,972 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:43:46,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:43:46,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1348629730, now seen corresponding path program 3 times [2020-07-21 01:43:46,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:43:46,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442987498] [2020-07-21 01:43:46,975 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:43:47,042 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:43:47,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:43:47,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 01:43:47,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:43:47,243 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:43:47,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:43:52,074 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 53 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:43:52,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442987498] [2020-07-21 01:43:52,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:43:52,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-07-21 01:43:52,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105765573] [2020-07-21 01:43:52,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 01:43:52,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:43:52,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 01:43:52,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=384, Unknown=2, NotChecked=0, Total=552 [2020-07-21 01:43:52,078 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 24 states. [2020-07-21 01:43:55,009 WARN L193 SmtUtils]: Spent 2.56 s on a formula simplification. DAG size of input: 56 DAG size of output: 11 [2020-07-21 01:43:55,597 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 11 [2020-07-21 01:43:58,059 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 11 [2020-07-21 01:43:58,677 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 11 [2020-07-21 01:43:59,426 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 11 [2020-07-21 01:44:02,940 WARN L193 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 31 DAG size of output: 11 [2020-07-21 01:44:03,835 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 11 [2020-07-21 01:44:12,221 WARN L193 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 21 DAG size of output: 11 [2020-07-21 01:44:14,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:44:14,869 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-07-21 01:44:14,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 01:44:14,872 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 20 [2020-07-21 01:44:14,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:44:14,875 INFO L225 Difference]: With dead ends: 38 [2020-07-21 01:44:14,876 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 01:44:14,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=406, Invalid=714, Unknown=2, NotChecked=0, Total=1122 [2020-07-21 01:44:14,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 01:44:14,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-21 01:44:14,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 01:44:14,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-07-21 01:44:14,887 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 20 [2020-07-21 01:44:14,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:44:14,888 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-07-21 01:44:14,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 01:44:14,888 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-07-21 01:44:14,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-21 01:44:14,890 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:44:14,890 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:44:15,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:44:15,107 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:44:15,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:44:15,108 INFO L82 PathProgramCache]: Analyzing trace with hash 144400734, now seen corresponding path program 4 times [2020-07-21 01:44:15,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:44:15,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726255579] [2020-07-21 01:44:15,109 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:44:15,172 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:44:15,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:44:15,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-21 01:44:15,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:44:15,593 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:44:15,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:44:38,322 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 246 refuted. 7 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:44:38,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726255579] [2020-07-21 01:44:38,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:44:38,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2020-07-21 01:44:38,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704193428] [2020-07-21 01:44:38,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-21 01:44:38,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:44:38,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-21 01:44:38,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1624, Unknown=10, NotChecked=0, Total=2256 [2020-07-21 01:44:38,328 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 48 states. [2020-07-21 01:44:41,486 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 116 DAG size of output: 11 [2020-07-21 01:44:43,519 WARN L838 $PredicateComparison]: unable to prove that (and (< (mod (+ c_main_~y~0 10) 4294967296) 1024) (< (mod (+ c_main_~y~0 11) 4294967296) 1024) (< (mod (+ c_main_~y~0 12) 4294967296) 1024) (< (mod (+ c_main_~y~0 2) 4294967296) 1024) (< (mod (+ c_main_~y~0 17) 4294967296) 1024) (< (mod (+ c_main_~y~0 1) 4294967296) 1024) (< (mod (+ c_main_~y~0 21) 4294967296) 1024) (< (mod (+ c_main_~y~0 8) 4294967296) 1024) (< (mod (+ c_main_~y~0 19) 4294967296) 1024) (< (mod (+ c_main_~y~0 20) 4294967296) 1024) (< (mod (+ c_main_~y~0 5) 4294967296) 1024) (< (mod (+ c_main_~y~0 7) 4294967296) 1024) (< (mod (+ c_main_~y~0 16) 4294967296) 1024) (< (mod (+ c_main_~y~0 14) 4294967296) 1024) (< (mod (+ c_main_~y~0 9) 4294967296) 1024) (< (mod (+ c_main_~y~0 3) 4294967296) 1024) (< (mod (+ c_main_~y~0 6) 4294967296) 1024) (< (mod (+ c_main_~y~0 18) 4294967296) 1024) (< (mod (+ c_main_~y~0 15) 4294967296) 1024) (< (mod (+ c_main_~y~0 13) 4294967296) 1024) (< (mod c_main_~y~0 4294967296) 1024) (< (mod (+ c_main_~y~0 4) 4294967296) 1024)) is different from false [2020-07-21 01:44:49,937 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 106 DAG size of output: 11 [2020-07-21 01:44:55,342 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 101 DAG size of output: 11 [2020-07-21 01:45:01,960 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 96 DAG size of output: 11 [2020-07-21 01:45:06,811 WARN L193 SmtUtils]: Spent 900.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 11 [2020-07-21 01:45:12,402 WARN L193 SmtUtils]: Spent 2.65 s on a formula simplification. DAG size of input: 86 DAG size of output: 11 [2020-07-21 01:45:20,235 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 11 [2020-07-21 01:45:28,548 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 11 [2020-07-21 01:45:34,653 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 11 [2020-07-21 01:45:38,128 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 11 [2020-07-21 01:45:44,872 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 11 [2020-07-21 01:45:57,241 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 11 [2020-07-21 01:46:02,718 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 11 [2020-07-21 01:46:07,802 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 11 [2020-07-21 01:46:14,000 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 11 [2020-07-21 01:46:25,870 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 36 DAG size of output: 11 [2020-07-21 01:46:32,125 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 11 [2020-07-21 01:46:40,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:46:40,786 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2020-07-21 01:46:40,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-21 01:46:40,787 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 32 [2020-07-21 01:46:40,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:46:40,788 INFO L225 Difference]: With dead ends: 62 [2020-07-21 01:46:40,789 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 01:46:40,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 142.7s TimeCoverageRelationStatistics Valid=1610, Invalid=3066, Unknown=20, NotChecked=134, Total=4830 [2020-07-21 01:46:40,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 01:46:40,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-21 01:46:40,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-21 01:46:40,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-07-21 01:46:40,808 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 32 [2020-07-21 01:46:40,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:46:40,809 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-07-21 01:46:40,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-21 01:46:40,809 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-07-21 01:46:40,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 01:46:40,811 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:46:40,811 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:46:41,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:41,017 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:46:41,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:46:41,018 INFO L82 PathProgramCache]: Analyzing trace with hash -726077986, now seen corresponding path program 5 times [2020-07-21 01:46:41,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:46:41,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283836853] [2020-07-21 01:46:41,019 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:41,095 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:46:41,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:46:41,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 95 conjunts are in the unsatisfiable core [2020-07-21 01:46:41,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:46:42,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:46:42,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:48:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1046 refuted. 35 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:48:39,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283836853] [2020-07-21 01:48:39,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:48:39,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2020-07-21 01:48:39,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270012477] [2020-07-21 01:48:39,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-07-21 01:48:39,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:48:39,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-07-21 01:48:39,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2398, Invalid=6669, Unknown=53, NotChecked=0, Total=9120 [2020-07-21 01:48:39,809 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 96 states. [2020-07-21 01:49:03,274 WARN L193 SmtUtils]: Spent 14.20 s on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2020-07-21 01:49:32,377 WARN L193 SmtUtils]: Spent 16.87 s on a formula simplification. DAG size of input: 231 DAG size of output: 11 [2020-07-21 01:49:59,180 WARN L193 SmtUtils]: Spent 10.51 s on a formula simplification. DAG size of input: 226 DAG size of output: 11 [2020-07-21 01:50:34,848 WARN L193 SmtUtils]: Spent 14.62 s on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2020-07-21 01:51:12,982 WARN L193 SmtUtils]: Spent 12.67 s on a formula simplification. DAG size of input: 216 DAG size of output: 11 [2020-07-21 01:51:56,638 WARN L193 SmtUtils]: Spent 12.90 s on a formula simplification. DAG size of input: 211 DAG size of output: 11 [2020-07-21 01:52:42,110 WARN L193 SmtUtils]: Spent 9.63 s on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2020-07-21 01:52:44,144 WARN L838 $PredicateComparison]: unable to prove that (and (< (mod (+ c_main_~y~0 28) 4294967296) 1024) (< (mod (+ c_main_~y~0 36) 4294967296) 1024) (< (mod (+ c_main_~y~0 39) 4294967296) 1024) (< (mod (+ c_main_~y~0 20) 4294967296) 1024) (< (mod (+ c_main_~y~0 38) 4294967296) 1024) (< (mod (+ c_main_~y~0 11) 4294967296) 1024) (< (mod (+ c_main_~y~0 8) 4294967296) 1024) (< (mod (+ c_main_~y~0 1) 4294967296) 1024) (< (mod (+ c_main_~y~0 10) 4294967296) 1024) (< (mod (+ c_main_~y~0 9) 4294967296) 1024) (< (mod (+ c_main_~y~0 27) 4294967296) 1024) (< (mod (+ c_main_~y~0 35) 4294967296) 1024) (< (mod (+ c_main_~y~0 33) 4294967296) 1024) (< (mod (+ c_main_~y~0 26) 4294967296) 1024) (< (mod (+ c_main_~y~0 29) 4294967296) 1024) (< (mod (+ c_main_~y~0 5) 4294967296) 1024) (< (mod (+ c_main_~y~0 23) 4294967296) 1024) (< (mod (+ c_main_~y~0 3) 4294967296) 1024) (< (mod (+ c_main_~y~0 30) 4294967296) 1024) (< (mod (+ c_main_~y~0 31) 4294967296) 1024) (< (mod (+ c_main_~y~0 4) 4294967296) 1024) (< (mod (+ c_main_~y~0 2) 4294967296) 1024) (< (mod (+ c_main_~y~0 14) 4294967296) 1024) (< (mod (+ c_main_~y~0 6) 4294967296) 1024) (< (mod c_main_~y~0 4294967296) 1024) (< (mod (+ c_main_~y~0 37) 4294967296) 1024) (< (mod (+ c_main_~y~0 19) 4294967296) 1024) (< (mod (+ c_main_~y~0 21) 4294967296) 1024) (< (mod (+ c_main_~y~0 7) 4294967296) 1024) (< (mod (+ c_main_~y~0 13) 4294967296) 1024) (< (mod (+ c_main_~y~0 34) 4294967296) 1024) (< (mod (+ c_main_~y~0 17) 4294967296) 1024) (< (mod (+ c_main_~y~0 25) 4294967296) 1024) (< (mod (+ c_main_~y~0 24) 4294967296) 1024) (< (mod (+ c_main_~y~0 12) 4294967296) 1024) (< (mod (+ c_main_~y~0 16) 4294967296) 1024) (< (mod (+ c_main_~y~0 22) 4294967296) 1024) (< (mod (+ c_main_~y~0 18) 4294967296) 1024) (< (mod (+ c_main_~y~0 15) 4294967296) 1024) (< (mod (+ c_main_~y~0 32) 4294967296) 1024)) is different from false [2020-07-21 01:53:43,440 WARN L193 SmtUtils]: Spent 10.45 s on a formula simplification. DAG size of input: 196 DAG size of output: 11 [2020-07-21 01:54:40,729 WARN L193 SmtUtils]: Spent 10.41 s on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2020-07-21 01:55:33,889 WARN L193 SmtUtils]: Spent 18.50 s on a formula simplification. DAG size of input: 186 DAG size of output: 11 [2020-07-21 01:56:39,826 WARN L193 SmtUtils]: Spent 10.25 s on a formula simplification. DAG size of input: 181 DAG size of output: 11 [2020-07-21 01:57:25,183 WARN L193 SmtUtils]: Spent 7.82 s on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2020-07-21 01:58:15,598 WARN L193 SmtUtils]: Spent 5.49 s on a formula simplification. DAG size of input: 171 DAG size of output: 11