/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/loops-crafted-1/sumt5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 02:08:19,602 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 02:08:19,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 02:08:19,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-21 02:08:19,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 02:08:19,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 02:08:19,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 02:08:19,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 02:08:19,654 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 02:08:19,655 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 02:08:19,657 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 02:08:19,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 02:08:19,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 02:08:19,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 02:08:19,666 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 02:08:19,668 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 02:08:19,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 02:08:19,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 02:08:19,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 02:08:19,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 02:08:19,687 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 02:08:19,706 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 02:08:19,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 02:08:19,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 02:08:19,709 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 02:08:19,709 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 02:08:19,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 02:08:19,710 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 02:08:19,710 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 02:08:19,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 02:08:19,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 02:08:19,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 02:08:19,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 02:08:19,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 02:08:19,711 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 02:08:19,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 02:08:19,712 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 02:08:19,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 02:08:19,712 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 02:08:19,713 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 02:08:19,713 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 02:08:19,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 02:08:19,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:08:19,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 02:08:19,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 02:08:19,714 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 02:08:19,715 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 02:08:19,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:08:19,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 02:08:19,715 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 02:08:19,715 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 02:08:20,072 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 02:08:20,091 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 02:08:20,097 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 02:08:20,099 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 02:08:20,099 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 02:08:20,100 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt5.c [2020-07-21 02:08:20,190 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccc1436ee/7c5664e91bcb4dfdba99e0c0885169b3/FLAGa6d20e2d8 [2020-07-21 02:08:20,816 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 02:08:20,817 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt5.c [2020-07-21 02:08:20,827 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccc1436ee/7c5664e91bcb4dfdba99e0c0885169b3/FLAGa6d20e2d8 [2020-07-21 02:08:21,181 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccc1436ee/7c5664e91bcb4dfdba99e0c0885169b3 [2020-07-21 02:08:21,203 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 02:08:21,210 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 02:08:21,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 02:08:21,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 02:08:21,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 02:08:21,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:08:21" (1/1) ... [2020-07-21 02:08:21,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@82fd315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:08:21, skipping insertion in model container [2020-07-21 02:08:21,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:08:21" (1/1) ... [2020-07-21 02:08:21,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 02:08:21,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 02:08:21,628 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:08:21,637 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 02:08:21,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:08:21,694 INFO L208 MainTranslator]: Completed translation [2020-07-21 02:08:21,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:08:21 WrapperNode [2020-07-21 02:08:21,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 02:08:21,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 02:08:21,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 02:08:21,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 02:08:21,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:08:21" (1/1) ... [2020-07-21 02:08:21,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:08:21" (1/1) ... [2020-07-21 02:08:21,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:08:21" (1/1) ... [2020-07-21 02:08:21,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:08:21" (1/1) ... [2020-07-21 02:08:21,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:08:21" (1/1) ... [2020-07-21 02:08:21,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:08:21" (1/1) ... [2020-07-21 02:08:21,876 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:08:21" (1/1) ... [2020-07-21 02:08:21,877 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 02:08:21,878 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 02:08:21,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 02:08:21,879 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 02:08:21,881 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:08:21" (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 02:08:21,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 02:08:21,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 02:08:21,989 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 02:08:21,989 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 02:08:21,989 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 02:08:21,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 02:08:21,990 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 02:08:21,990 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 02:08:21,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 02:08:21,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 02:08:21,990 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 02:08:21,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 02:08:21,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 02:08:22,356 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 02:08:22,357 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 02:08:22,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:08:22 BoogieIcfgContainer [2020-07-21 02:08:22,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 02:08:22,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 02:08:22,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 02:08:22,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 02:08:22,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:08:21" (1/3) ... [2020-07-21 02:08:22,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@487a3e1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:08:22, skipping insertion in model container [2020-07-21 02:08:22,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:08:21" (2/3) ... [2020-07-21 02:08:22,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@487a3e1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:08:22, skipping insertion in model container [2020-07-21 02:08:22,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:08:22" (3/3) ... [2020-07-21 02:08:22,384 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt5.c [2020-07-21 02:08:22,403 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 02:08:22,417 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 02:08:22,439 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 02:08:22,475 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 02:08:22,476 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 02:08:22,476 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 02:08:22,476 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 02:08:22,476 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 02:08:22,476 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 02:08:22,476 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 02:08:22,476 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 02:08:22,504 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-21 02:08:22,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 02:08:22,516 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:08:22,517 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:08:22,519 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:08:22,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:08:22,528 INFO L82 PathProgramCache]: Analyzing trace with hash 333887070, now seen corresponding path program 1 times [2020-07-21 02:08:22,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:08:22,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857225751] [2020-07-21 02:08:22,541 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 02:08:22,746 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 02:08:22,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:08:22,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 02:08:22,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:08:22,815 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 02:08:22,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:08:22,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857225751] [2020-07-21 02:08:22,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:08:22,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 02:08:22,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943226069] [2020-07-21 02:08:22,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 02:08:22,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:08:22,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 02:08:22,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 02:08:22,866 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-07-21 02:08:22,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:08:22,907 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2020-07-21 02:08:22,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 02:08:22,909 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-07-21 02:08:22,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:08:22,927 INFO L225 Difference]: With dead ends: 37 [2020-07-21 02:08:22,927 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 02:08:22,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 02:08:22,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 02:08:22,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 02:08:22,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 02:08:22,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-07-21 02:08:22,991 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2020-07-21 02:08:22,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:08:22,993 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-07-21 02:08:22,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 02:08:22,993 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-07-21 02:08:22,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 02:08:22,994 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:08:22,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:08:23,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:08:23,211 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:08:23,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:08:23,213 INFO L82 PathProgramCache]: Analyzing trace with hash 309875524, now seen corresponding path program 1 times [2020-07-21 02:08:23,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:08:23,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796246044] [2020-07-21 02:08:23,214 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 02:08:23,265 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 02:08:23,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:08:23,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 02:08:23,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:08:23,392 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 02:08:23,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:08:23,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796246044] [2020-07-21 02:08:23,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:08:23,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 02:08:23,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796290493] [2020-07-21 02:08:23,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 02:08:23,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:08:23,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 02:08:23,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:08:23,397 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 5 states. [2020-07-21 02:08:23,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:08:23,559 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2020-07-21 02:08:23,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:08:23,559 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-21 02:08:23,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:08:23,561 INFO L225 Difference]: With dead ends: 34 [2020-07-21 02:08:23,561 INFO L226 Difference]: Without dead ends: 20 [2020-07-21 02:08:23,563 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 [2020-07-21 02:08:23,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-21 02:08:23,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-21 02:08:23,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 02:08:23,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-07-21 02:08:23,571 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2020-07-21 02:08:23,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:08:23,571 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-07-21 02:08:23,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 02:08:23,572 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-07-21 02:08:23,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 02:08:23,573 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:08:23,573 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:08:23,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:08:23,788 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:08:23,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:08:23,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1451693947, now seen corresponding path program 1 times [2020-07-21 02:08:23,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:08:23,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743954394] [2020-07-21 02:08:23,792 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 02:08:23,846 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 02:08:23,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:08:23,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 02:08:23,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:08:24,225 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 02:08:24,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 02:08:24,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 02:08:24,694 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 02:08:24,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743954394] [2020-07-21 02:08:24,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 02:08:24,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 02:08:24,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464397302] [2020-07-21 02:08:24,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 02:08:24,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:08:24,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 02:08:24,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-07-21 02:08:24,700 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 14 states. [2020-07-21 02:08:31,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:08:31,381 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2020-07-21 02:08:31,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 02:08:31,383 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2020-07-21 02:08:31,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:08:31,384 INFO L225 Difference]: With dead ends: 43 [2020-07-21 02:08:31,385 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 02:08:31,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-07-21 02:08:31,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 02:08:31,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-21 02:08:31,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 02:08:31,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-21 02:08:31,400 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2020-07-21 02:08:31,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:08:31,401 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-21 02:08:31,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 02:08:31,401 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-21 02:08:31,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 02:08:31,403 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:08:31,403 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:08:31,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:08:31,618 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:08:31,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:08:31,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1035578608, now seen corresponding path program 1 times [2020-07-21 02:08:31,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:08:31,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479504171] [2020-07-21 02:08:31,621 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 02:08:31,671 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 02:08:31,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:08:31,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 02:08:31,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:08:31,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:08:31,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 02:08:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 7 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:08:40,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479504171] [2020-07-21 02:08:40,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 02:08:40,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 02:08:40,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482889002] [2020-07-21 02:08:40,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 02:08:40,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:08:40,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 02:08:40,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=31, Unknown=4, NotChecked=0, Total=56 [2020-07-21 02:08:40,131 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 8 states. [2020-07-21 02:08:42,327 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 5) 4294967296))) is different from false [2020-07-21 02:09:38,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:09:38,570 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2020-07-21 02:09:38,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 02:09:38,573 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-07-21 02:09:38,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:09:38,576 INFO L225 Difference]: With dead ends: 54 [2020-07-21 02:09:38,576 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 02:09:38,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=23, Invalid=32, Unknown=5, NotChecked=12, Total=72 [2020-07-21 02:09:38,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 02:09:38,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-07-21 02:09:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 02:09:38,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-07-21 02:09:38,592 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 24 [2020-07-21 02:09:38,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:09:38,593 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-07-21 02:09:38,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 02:09:38,593 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-07-21 02:09:38,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 02:09:38,595 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:09:38,595 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:09:38,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:09:38,800 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:09:38,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:09:38,801 INFO L82 PathProgramCache]: Analyzing trace with hash 2020075371, now seen corresponding path program 1 times [2020-07-21 02:09:38,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:09:38,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056007091] [2020-07-21 02:09:38,803 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 02:09:38,865 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 02:09:38,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:09:38,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-21 02:09:38,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:09:39,381 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:09:39,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 02:09:39,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 02:10:17,350 WARN L193 SmtUtils]: Spent 29.20 s on a formula simplification. DAG size of input: 49 DAG size of output: 29 [2020-07-21 02:10:25,833 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 02:10:34,300 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 02:10:49,001 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 02:11:07,829 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 02:11:26,569 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 02:11:26,589 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:11:26,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056007091] [2020-07-21 02:11:26,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 02:11:26,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2020-07-21 02:11:26,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468249438] [2020-07-21 02:11:26,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 02:11:26,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:11:26,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 02:11:26,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=373, Unknown=30, NotChecked=0, Total=506 [2020-07-21 02:11:26,592 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 23 states. [2020-07-21 02:11:31,074 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (+ c_main_~l~0 2))) (let ((.cse0 (= 0 (mod (mod (mod .cse4 4294967296) 5) 4294967296))) (.cse1 (forall ((main_~n~0 Int)) (or (< (mod (+ c_main_~l~0 3) 4294967296) (mod main_~n~0 4294967296)) (<= (mod main_~n~0 4294967296) (mod (+ c_main_~l~0 2) 4294967296))))) (.cse2 (mod (+ c_main_~l~0 3) 4294967296)) (.cse3 (+ c_main_~l~0 1))) (and (or .cse0 .cse1 (= (mod (+ c_main_~v4~0 c_main_~i~0 c_main_~j~0 c_main_~k~0 c_main_~v3~0 2) 4294967296) .cse2)) (or .cse0 .cse1 (= (mod (+ c_main_~v4~0 c_main_~i~0 c_main_~j~0 c_main_~k~0 c_main_~v3~0 3) 4294967296) .cse2)) (or (< (mod .cse3 4294967296) (mod c_main_~n~0 4294967296)) (= (mod (+ c_main_~v4~0 c_main_~i~0 c_main_~j~0 c_main_~k~0 c_main_~v3~0) 4294967296) (mod .cse3 4294967296))) (or (= (mod (+ c_main_~v4~0 c_main_~i~0 c_main_~j~0 c_main_~k~0 c_main_~v3~0 1) 4294967296) (mod .cse4 4294967296)) (= 0 (mod (mod (mod .cse3 4294967296) 5) 4294967296)) (forall ((main_~n~0 Int)) (or (< (mod (+ c_main_~l~0 2) 4294967296) (mod main_~n~0 4294967296)) (<= (mod main_~n~0 4294967296) (mod (+ c_main_~l~0 1) 4294967296)))))))) is different from false [2020-07-21 02:12:22,792 WARN L193 SmtUtils]: Spent 35.11 s on a formula simplification that was a NOOP. DAG size: 72 [2020-07-21 02:13:26,818 WARN L193 SmtUtils]: Spent 36.28 s on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 02:13:35,294 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_main_~l~0 1))) (let ((.cse0 (= (mod (+ c_main_~v4~0 c_main_~i~0 c_main_~j~0 c_main_~k~0 c_main_~v3~0 1) 4294967296) (mod .cse2 4294967296))) (.cse1 (= 0 (mod (mod (mod c_main_~l~0 4294967296) 5) 4294967296)))) (and (or .cse0 (forall ((main_~n~0 Int)) (or (< (mod (+ c_main_~l~0 1) 4294967296) (mod main_~n~0 4294967296)) (<= (mod main_~n~0 4294967296) (mod c_main_~l~0 4294967296)))) .cse1) (or .cse0 (< (mod .cse2 4294967296) (mod c_main_~n~0 4294967296)) .cse1) (or (= 0 (mod (mod (mod .cse2 4294967296) 5) 4294967296)) (= (mod (+ c_main_~l~0 2) 4294967296) (mod (+ c_main_~v4~0 c_main_~i~0 c_main_~j~0 c_main_~k~0 c_main_~v3~0 2) 4294967296)) (forall ((main_~n~0 Int)) (or (< (mod (+ c_main_~l~0 2) 4294967296) (mod main_~n~0 4294967296)) (<= (mod main_~n~0 4294967296) (mod (+ c_main_~l~0 1) 4294967296))))) (or (< (mod c_main_~l~0 4294967296) (mod c_main_~n~0 4294967296)) (= (mod (+ c_main_~v4~0 c_main_~i~0 c_main_~j~0 c_main_~k~0 c_main_~v3~0) 4294967296) (mod c_main_~l~0 4294967296)))))) is different from false [2020-07-21 02:13:37,432 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_main_~l~0 1))) (let ((.cse0 (= (mod (+ c_main_~v4~0 c_main_~i~0 c_main_~j~0 c_main_~k~0 c_main_~v3~0 1) 4294967296) (mod .cse2 4294967296))) (.cse1 (= 0 (mod (mod (mod c_main_~l~0 4294967296) 5) 4294967296)))) (and (or .cse0 (forall ((main_~n~0 Int)) (or (< (mod (+ c_main_~l~0 1) 4294967296) (mod main_~n~0 4294967296)) (<= (mod main_~n~0 4294967296) (mod c_main_~l~0 4294967296)))) .cse1) (or .cse0 (< (mod .cse2 4294967296) (mod c_main_~n~0 4294967296)) .cse1) (or (= 0 (mod (mod (mod .cse2 4294967296) 5) 4294967296)) (= (mod (+ c_main_~l~0 2) 4294967296) (mod (+ c_main_~v4~0 c_main_~i~0 c_main_~j~0 c_main_~k~0 c_main_~v3~0 2) 4294967296)) (forall ((main_~n~0 Int)) (or (< (mod (+ c_main_~l~0 2) 4294967296) (mod main_~n~0 4294967296)) (<= (mod main_~n~0 4294967296) (mod (+ c_main_~l~0 1) 4294967296))))) (or (< (mod c_main_~l~0 4294967296) (mod c_main_~n~0 4294967296)) (= (mod (+ c_main_~v4~0 c_main_~i~0 c_main_~j~0 c_main_~k~0 c_main_~v3~0) 4294967296) (mod c_main_~l~0 4294967296)))))) is different from true [2020-07-21 02:13:58,961 WARN L193 SmtUtils]: Spent 8.62 s on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 02:15:06,067 WARN L193 SmtUtils]: Spent 21.46 s on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 02:15:40,416 WARN L193 SmtUtils]: Spent 6.46 s on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 02:15:51,350 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_main_~l~0 1))) (let ((.cse0 (= (mod (+ c_main_~v4~0 c_main_~i~0 c_main_~j~0 c_main_~k~0 c_main_~v3~0 1) 4294967296) (mod .cse2 4294967296))) (.cse1 (= 0 (mod (mod (mod c_main_~l~0 4294967296) 5) 4294967296)))) (and (or .cse0 (forall ((main_~n~0 Int)) (or (< (mod (+ c_main_~l~0 1) 4294967296) (mod main_~n~0 4294967296)) (<= (mod main_~n~0 4294967296) (mod c_main_~l~0 4294967296)))) .cse1) (or .cse0 (< (mod .cse2 4294967296) (mod c_main_~n~0 4294967296)) .cse1) (or (< (mod c_main_~l~0 4294967296) (mod c_main_~n~0 4294967296)) (= (mod (+ c_main_~v4~0 c_main_~i~0 c_main_~j~0 c_main_~k~0 c_main_~v3~0) 4294967296) (mod c_main_~l~0 4294967296)))))) is different from true [2020-07-21 02:16:23,468 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 02:17:18,249 WARN L193 SmtUtils]: Spent 7.86 s on a formula simplification. DAG size of input: 43 DAG size of output: 12 [2020-07-21 02:17:39,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:17:39,630 INFO L93 Difference]: Finished difference Result 76 states and 101 transitions. [2020-07-21 02:17:39,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-21 02:17:39,632 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-07-21 02:17:39,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:17:39,633 INFO L225 Difference]: With dead ends: 76 [2020-07-21 02:17:39,633 INFO L226 Difference]: Without dead ends: 55 [2020-07-21 02:17:39,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 366.6s TimeCoverageRelationStatistics Valid=192, Invalid=656, Unknown=94, NotChecked=180, Total=1122 [2020-07-21 02:17:39,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-21 02:17:39,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2020-07-21 02:17:39,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-21 02:17:39,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2020-07-21 02:17:39,644 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 27 [2020-07-21 02:17:39,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:17:39,645 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2020-07-21 02:17:39,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 02:17:39,645 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2020-07-21 02:17:39,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-21 02:17:39,646 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:17:39,646 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:17:39,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:17:39,861 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:17:39,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:17:39,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1204685030, now seen corresponding path program 1 times [2020-07-21 02:17:39,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:17:39,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219336782] [2020-07-21 02:17:39,863 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 02:17:39,908 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 02:17:39,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:17:39,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-21 02:17:39,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:17:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:17:40,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 02:17:40,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 02:18:24,543 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 35 refuted. 7 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:24,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219336782] [2020-07-21 02:18:24,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 02:18:24,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2020-07-21 02:18:24,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140864477] [2020-07-21 02:18:24,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-21 02:18:24,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:24,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-21 02:18:24,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=699, Unknown=20, NotChecked=0, Total=870 [2020-07-21 02:18:24,549 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand 30 states. [2020-07-21 02:18:38,578 WARN L193 SmtUtils]: Spent 13.08 s on a formula simplification. DAG size of input: 99 DAG size of output: 22 [2020-07-21 02:19:12,099 WARN L193 SmtUtils]: Spent 24.62 s on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2020-07-21 02:20:04,971 WARN L193 SmtUtils]: Spent 44.33 s on a formula simplification. DAG size of input: 98 DAG size of output: 44 [2020-07-21 02:20:44,568 WARN L193 SmtUtils]: Spent 28.76 s on a formula simplification. DAG size of input: 77 DAG size of output: 24 [2020-07-21 02:21:20,429 WARN L193 SmtUtils]: Spent 17.22 s on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2020-07-21 02:22:09,690 WARN L193 SmtUtils]: Spent 23.54 s on a formula simplification. DAG size of input: 71 DAG size of output: 37 [2020-07-21 02:22:49,008 WARN L193 SmtUtils]: Spent 21.22 s on a formula simplification. DAG size of input: 81 DAG size of output: 29