/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 DAGSIZE --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-crafted/simple_vardep_2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:27:40,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:27:40,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:27:40,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:27:40,310 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:27:40,311 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:27:40,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:27:40,314 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:27:40,316 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:27:40,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:27:40,317 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:27:40,318 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:27:40,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:27:40,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:27:40,321 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:27:40,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:27:40,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:27:40,323 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:27:40,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:27:40,327 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:27:40,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:27:40,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:27:40,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:27:40,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:27:40,335 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:27:40,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:27:40,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:27:40,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:27:40,346 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 22:27:40,361 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:27:40,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:27:40,362 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:27:40,362 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:27:40,363 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:27:40,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:27:40,363 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:27:40,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:27:40,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:27:40,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:27:40,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:27:40,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:27:40,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:27:40,364 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:27:40,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:27:40,365 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:27:40,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:27:40,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:27:40,365 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:27:40,365 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:27:40,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:27:40,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:27:40,366 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:27:40,366 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:27:40,366 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:27:40,367 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:27:40,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:40,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:27:40,367 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:27:40,367 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 -> DAGSIZE 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 [2020-07-20 22:27:40,637 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:27:40,650 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:27:40,654 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:27:40,656 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:27:40,656 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:27:40,657 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_vardep_2.c [2020-07-20 22:27:40,718 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/115ec6a79/7475d42eee764c5bb7bb02915aec3c77/FLAGbbf96f0d4 [2020-07-20 22:27:41,166 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:27:41,166 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_vardep_2.c [2020-07-20 22:27:41,172 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/115ec6a79/7475d42eee764c5bb7bb02915aec3c77/FLAGbbf96f0d4 [2020-07-20 22:27:41,559 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/115ec6a79/7475d42eee764c5bb7bb02915aec3c77 [2020-07-20 22:27:41,567 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:27:41,570 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:27:41,571 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:27:41,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:27:41,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:27:41,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:27:41" (1/1) ... [2020-07-20 22:27:41,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51bcc2aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:41, skipping insertion in model container [2020-07-20 22:27:41,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:27:41" (1/1) ... [2020-07-20 22:27:41,586 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:27:41,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:27:41,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:27:41,776 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:27:41,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:27:41,809 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:27:41,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:41 WrapperNode [2020-07-20 22:27:41,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:27:41,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:27:41,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:27:41,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:27:41,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:41" (1/1) ... [2020-07-20 22:27:41,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:41" (1/1) ... [2020-07-20 22:27:41,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:41" (1/1) ... [2020-07-20 22:27:41,830 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:41" (1/1) ... [2020-07-20 22:27:41,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:41" (1/1) ... [2020-07-20 22:27:41,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:41" (1/1) ... [2020-07-20 22:27:41,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:41" (1/1) ... [2020-07-20 22:27:41,917 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:27:41,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:27:41,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:27:41,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:27:41,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:27:41,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:27:41,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:27:41,996 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:27:41,996 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:27:41,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:27:41,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:27:41,997 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:27:41,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:27:41,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:27:42,157 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:27:42,157 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 22:27:42,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:27:42 BoogieIcfgContainer [2020-07-20 22:27:42,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:27:42,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:27:42,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:27:42,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:27:42,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:27:41" (1/3) ... [2020-07-20 22:27:42,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c530393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:27:42, skipping insertion in model container [2020-07-20 22:27:42,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:41" (2/3) ... [2020-07-20 22:27:42,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c530393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:27:42, skipping insertion in model container [2020-07-20 22:27:42,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:27:42" (3/3) ... [2020-07-20 22:27:42,168 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_vardep_2.c [2020-07-20 22:27:42,177 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:27:42,184 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:27:42,198 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:27:42,222 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:27:42,222 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:27:42,222 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:27:42,222 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:27:42,222 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:27:42,223 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:27:42,223 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:27:42,223 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:27:42,240 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-07-20 22:27:42,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 22:27:42,245 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:27:42,247 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:27:42,247 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:27:42,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:27:42,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1847991872, now seen corresponding path program 1 times [2020-07-20 22:27:42,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:27:42,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770522054] [2020-07-20 22:27:42,260 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 [2020-07-20 22:27:42,376 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:27:42,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:27:42,380 WARN L261 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 22:27:42,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:27:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:27:42,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:27:42,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770522054] [2020-07-20 22:27:42,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:27:42,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 22:27:42,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307364951] [2020-07-20 22:27:42,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:27:42,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:27:42,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:27:42,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:27:42,547 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 6 states. [2020-07-20 22:27:42,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:27:42,670 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2020-07-20 22:27:42,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:27:42,672 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-07-20 22:27:42,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:27:42,679 INFO L225 Difference]: With dead ends: 36 [2020-07-20 22:27:42,679 INFO L226 Difference]: Without dead ends: 20 [2020-07-20 22:27:42,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 22:27:42,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-20 22:27:42,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-07-20 22:27:42,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-20 22:27:42,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-07-20 22:27:42,724 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2020-07-20 22:27:42,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:27:42,724 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-07-20 22:27:42,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:27:42,725 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-07-20 22:27:42,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 22:27:42,726 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:27:42,726 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:27:42,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:42,941 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:27:42,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:27:42,943 INFO L82 PathProgramCache]: Analyzing trace with hash 982254813, now seen corresponding path program 1 times [2020-07-20 22:27:42,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:27:42,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765531080] [2020-07-20 22:27:42,944 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 [2020-07-20 22:27:42,989 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:27:42,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:27:42,991 WARN L261 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 22:27:42,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:27:43,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:27:43,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:27:43,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:27:47,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:27:55,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:27:55,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765531080] [2020-07-20 22:27:55,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:27:55,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 22:27:55,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548233123] [2020-07-20 22:27:55,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 22:27:55,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:27:55,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 22:27:55,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=58, Unknown=6, NotChecked=0, Total=90 [2020-07-20 22:27:55,624 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-07-20 22:28:25,526 WARN L193 SmtUtils]: Spent 23.39 s on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-07-20 22:28:49,229 WARN L193 SmtUtils]: Spent 8.20 s on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 22:29:01,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:01,624 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-07-20 22:29:01,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 22:29:01,625 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-07-20 22:29:01,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:01,627 INFO L225 Difference]: With dead ends: 34 [2020-07-20 22:29:01,627 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 22:29:01,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 62.7s TimeCoverageRelationStatistics Valid=45, Invalid=96, Unknown=15, NotChecked=0, Total=156 [2020-07-20 22:29:01,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 22:29:01,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-07-20 22:29:01,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 22:29:01,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-07-20 22:29:01,654 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 16 [2020-07-20 22:29:01,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:01,655 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-07-20 22:29:01,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 22:29:01,656 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-07-20 22:29:01,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 22:29:01,662 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:01,662 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:01,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:01,876 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:01,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:01,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1130438097, now seen corresponding path program 2 times [2020-07-20 22:29:01,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:01,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545783958] [2020-07-20 22:29:01,878 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 [2020-07-20 22:29:02,025 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:02,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:02,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2020-07-20 22:29:02,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 22:29:02,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:02,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:06,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:15,026 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:29:15,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:27,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:45,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:06,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 0 refuted. 30 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 22:30:29,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545783958] [2020-07-20 22:30:29,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:30:29,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-07-20 22:30:29,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44329135] [2020-07-20 22:30:29,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 22:30:29,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:30:29,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 22:30:29,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=181, Unknown=42, NotChecked=0, Total=306 [2020-07-20 22:30:29,647 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 18 states. [2020-07-20 22:30:32,041 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_main_~i~0 2)) (.cse0 (* c_main_~i~0 3))) (and (= (mod (+ .cse0 9) 4294967296) (mod (+ c_main_~k~0 9) 4294967296)) (= (mod (+ .cse0 18) 4294967296) (mod (+ c_main_~k~0 18) 4294967296)) (= (mod (+ c_main_~j~0 2) 4294967296) (mod (+ .cse1 2) 4294967296)) (= (mod (+ c_main_~k~0 3) 4294967296) (mod (+ .cse0 3) 4294967296)) (= (mod c_main_~k~0 4294967296) (mod .cse0 4294967296)) (= (mod (+ .cse1 6) 4294967296) (mod (+ c_main_~j~0 6) 4294967296)) (= (mod (+ .cse0 6) 4294967296) (mod (+ c_main_~k~0 6) 4294967296)) (= (mod (+ c_main_~j~0 10) 4294967296) (mod (+ .cse1 10) 4294967296)) (= (mod (+ .cse1 12) 4294967296) (mod (+ c_main_~j~0 12) 4294967296)) (= (mod (+ .cse1 4) 4294967296) (mod (+ c_main_~j~0 4) 4294967296)) (= (mod .cse1 4294967296) (mod c_main_~j~0 4294967296)) (= (mod (+ c_main_~k~0 15) 4294967296) (mod (+ .cse0 15) 4294967296)))) is different from false [2020-07-20 22:30:34,079 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_main_~i~0 2)) (.cse0 (* c_main_~i~0 3))) (and (= (mod (+ .cse0 9) 4294967296) (mod (+ c_main_~k~0 9) 4294967296)) (= (mod (+ c_main_~j~0 2) 4294967296) (mod (+ .cse1 2) 4294967296)) (= (mod (+ c_main_~k~0 3) 4294967296) (mod (+ .cse0 3) 4294967296)) (= (mod (+ .cse1 6) 4294967296) (mod (+ c_main_~j~0 6) 4294967296)) (= (mod (+ c_main_~j~0 8) 4294967296) (mod (+ .cse1 8) 4294967296)) (= (mod (+ .cse0 6) 4294967296) (mod (+ c_main_~k~0 6) 4294967296)) (= (mod (+ c_main_~j~0 10) 4294967296) (mod (+ .cse1 10) 4294967296)) (= (mod (+ .cse1 4) 4294967296) (mod (+ c_main_~j~0 4) 4294967296)) (= (mod (+ .cse0 12) 4294967296) (mod (+ c_main_~k~0 12) 4294967296)) (= (mod (+ c_main_~k~0 15) 4294967296) (mod (+ .cse0 15) 4294967296)))) is different from false [2020-07-20 22:30:36,090 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~i~0 3)) (.cse1 (* c_main_~i~0 2))) (and (= (mod (+ .cse0 9) 4294967296) (mod (+ c_main_~k~0 9) 4294967296)) (= (mod (+ c_main_~j~0 2) 4294967296) (mod (+ .cse1 2) 4294967296)) (= (mod (+ c_main_~k~0 3) 4294967296) (mod (+ .cse0 3) 4294967296)) (= (mod c_main_~k~0 4294967296) (mod .cse0 4294967296)) (= (mod (+ .cse1 6) 4294967296) (mod (+ c_main_~j~0 6) 4294967296)) (= (mod (+ c_main_~j~0 8) 4294967296) (mod (+ .cse1 8) 4294967296)) (= (mod (+ .cse0 6) 4294967296) (mod (+ c_main_~k~0 6) 4294967296)) (= (mod (+ .cse1 4) 4294967296) (mod (+ c_main_~j~0 4) 4294967296)) (= (mod (+ .cse0 12) 4294967296) (mod (+ c_main_~k~0 12) 4294967296)) (= (mod .cse1 4294967296) (mod c_main_~j~0 4294967296)))) is different from false [2020-07-20 22:30:38,103 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_main_~i~0 2)) (.cse0 (* c_main_~i~0 3))) (and (= (mod (+ .cse0 9) 4294967296) (mod (+ c_main_~k~0 9) 4294967296)) (= (mod (+ c_main_~j~0 2) 4294967296) (mod (+ .cse1 2) 4294967296)) (= (mod (+ c_main_~k~0 3) 4294967296) (mod (+ .cse0 3) 4294967296)) (= (mod (+ .cse1 6) 4294967296) (mod (+ c_main_~j~0 6) 4294967296)) (= (mod (+ c_main_~j~0 8) 4294967296) (mod (+ .cse1 8) 4294967296)) (= (mod (+ .cse0 6) 4294967296) (mod (+ c_main_~k~0 6) 4294967296)) (= (mod (+ .cse1 4) 4294967296) (mod (+ c_main_~j~0 4) 4294967296)) (= (mod (+ .cse0 12) 4294967296) (mod (+ c_main_~k~0 12) 4294967296)))) is different from false [2020-07-20 22:31:19,155 WARN L193 SmtUtils]: Spent 19.05 s on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 22:31:23,211 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~i~0 3)) (.cse1 (* c_main_~i~0 2))) (and (= (mod (+ .cse0 9) 4294967296) (mod (+ c_main_~k~0 9) 4294967296)) (= (mod (+ c_main_~j~0 2) 4294967296) (mod (+ .cse1 2) 4294967296)) (= (mod (+ c_main_~k~0 3) 4294967296) (mod (+ .cse0 3) 4294967296)) (= (mod (+ .cse1 6) 4294967296) (mod (+ c_main_~j~0 6) 4294967296)) (= (mod (+ .cse0 6) 4294967296) (mod (+ c_main_~k~0 6) 4294967296)) (= (mod (+ .cse1 4) 4294967296) (mod (+ c_main_~j~0 4) 4294967296)))) is different from false [2020-07-20 22:32:03,507 WARN L193 SmtUtils]: Spent 14.54 s on a formula simplification that was a NOOP. DAG size: 48 [2020-07-20 22:33:08,628 WARN L193 SmtUtils]: Spent 35.70 s on a formula simplification. DAG size of input: 64 DAG size of output: 28 [2020-07-20 22:34:04,105 WARN L193 SmtUtils]: Spent 14.50 s on a formula simplification that was a NOOP. DAG size: 48 [2020-07-20 22:34:59,214 WARN L193 SmtUtils]: Spent 8.25 s on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 22:35:54,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:35:54,859 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-07-20 22:35:54,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 22:35:54,861 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-07-20 22:35:54,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:35:54,864 INFO L225 Difference]: With dead ends: 56 [2020-07-20 22:35:54,865 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 22:35:54,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 332.2s TimeCoverageRelationStatistics Valid=165, Invalid=292, Unknown=115, NotChecked=240, Total=812 [2020-07-20 22:35:54,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 22:35:54,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-07-20 22:35:54,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-20 22:35:54,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2020-07-20 22:35:54,887 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 40 [2020-07-20 22:35:54,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:35:54,888 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2020-07-20 22:35:54,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 22:35:54,888 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2020-07-20 22:35:54,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-20 22:35:54,891 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:35:54,892 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:35:55,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:35:55,099 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:35:55,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:35:55,100 INFO L82 PathProgramCache]: Analyzing trace with hash -811144676, now seen corresponding path program 3 times [2020-07-20 22:35:55,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:35:55,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802853343] [2020-07-20 22:35:55,101 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 [2020-07-20 22:35:55,418 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:35:55,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:35:55,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 87 conjunts are in the unsatisfiable core [2020-07-20 22:35:55,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:35:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 24 proven. 156 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-07-20 22:35:55,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:35:56,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:36:00,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:36:08,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:36:21,538 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:36:21,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:36:39,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:37:00,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:37:25,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:37:54,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:38:27,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:39:03,974 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:39:04,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:39:45,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:40:29,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:41:19,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:42:12,946 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 28 proven. 0 refuted. 152 times theorem prover too weak. 264 trivial. 0 not checked. [2020-07-20 22:42:12,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802853343] [2020-07-20 22:42:12,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:42:12,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2020-07-20 22:42:12,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496590056] [2020-07-20 22:42:12,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-20 22:42:12,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:42:12,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-20 22:42:12,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=553, Unknown=179, NotChecked=0, Total=992 [2020-07-20 22:42:12,954 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 32 states. [2020-07-20 22:42:17,601 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_main_~i~0 2)) (.cse0 (* c_main_~i~0 3))) (and (= (mod (+ .cse0 15) 4294967296) (mod (+ c_main_~k~0 15) 4294967296)) (= (mod (+ .cse1 6) 4294967296) (mod (+ c_main_~j~0 6) 4294967296)) (= (mod (+ c_main_~k~0 6) 4294967296) (mod (+ .cse0 6) 4294967296)) (= (mod .cse1 4294967296) (mod c_main_~j~0 4294967296)) (= (mod (+ .cse1 12) 4294967296) (mod (+ c_main_~j~0 12) 4294967296)) (= (mod (+ c_main_~k~0 30) 4294967296) (mod (+ .cse0 30) 4294967296)) (= (mod (+ c_main_~j~0 20) 4294967296) (mod (+ .cse1 20) 4294967296)) (= (mod (+ .cse0 21) 4294967296) (mod (+ c_main_~k~0 21) 4294967296)) (= (mod (+ .cse0 18) 4294967296) (mod (+ c_main_~k~0 18) 4294967296)) (= (mod (+ .cse1 24) 4294967296) (mod (+ c_main_~j~0 24) 4294967296)) (= (mod (+ .cse1 14) 4294967296) (mod (+ c_main_~j~0 14) 4294967296)) (= (mod (+ c_main_~k~0 3) 4294967296) (mod (+ .cse0 3) 4294967296)) (= (mod (+ .cse0 39) 4294967296) (mod (+ c_main_~k~0 39) 4294967296)) (= (mod (+ c_main_~k~0 9) 4294967296) (mod (+ .cse0 9) 4294967296)) (= (mod (+ c_main_~j~0 4) 4294967296) (mod (+ .cse1 4) 4294967296)) (= (mod (+ c_main_~j~0 2) 4294967296) (mod (+ .cse1 2) 4294967296)) (= (mod (+ c_main_~k~0 36) 4294967296) (mod (+ .cse0 36) 4294967296)) (= (mod (+ c_main_~k~0 24) 4294967296) (mod (+ .cse0 24) 4294967296)) (= (mod (+ .cse1 26) 4294967296) (mod (+ c_main_~j~0 26) 4294967296)) (= (mod (+ c_main_~j~0 16) 4294967296) (mod (+ .cse1 16) 4294967296)) (= (mod (+ c_main_~j~0 10) 4294967296) (mod (+ .cse1 10) 4294967296)) (= (mod .cse0 4294967296) (mod c_main_~k~0 4294967296)))) is different from false [2020-07-20 22:42:19,626 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~i~0 3)) (.cse1 (* c_main_~i~0 2))) (and (= (mod (+ .cse0 15) 4294967296) (mod (+ c_main_~k~0 15) 4294967296)) (= (mod (+ .cse1 6) 4294967296) (mod (+ c_main_~j~0 6) 4294967296)) (= (mod (+ c_main_~k~0 6) 4294967296) (mod (+ .cse0 6) 4294967296)) (= (mod (+ .cse1 12) 4294967296) (mod (+ c_main_~j~0 12) 4294967296)) (= (mod (+ c_main_~k~0 30) 4294967296) (mod (+ .cse0 30) 4294967296)) (= (mod (+ c_main_~j~0 20) 4294967296) (mod (+ .cse1 20) 4294967296)) (= (mod (+ .cse0 21) 4294967296) (mod (+ c_main_~k~0 21) 4294967296)) (= (mod (+ .cse0 18) 4294967296) (mod (+ c_main_~k~0 18) 4294967296)) (= (mod (+ .cse1 24) 4294967296) (mod (+ c_main_~j~0 24) 4294967296)) (= (mod (+ .cse1 14) 4294967296) (mod (+ c_main_~j~0 14) 4294967296)) (= (mod (+ c_main_~k~0 3) 4294967296) (mod (+ .cse0 3) 4294967296)) (= (mod (+ c_main_~k~0 9) 4294967296) (mod (+ .cse0 9) 4294967296)) (= (mod (+ c_main_~j~0 4) 4294967296) (mod (+ .cse1 4) 4294967296)) (= (mod (+ c_main_~j~0 2) 4294967296) (mod (+ .cse1 2) 4294967296)) (= (mod (+ c_main_~k~0 36) 4294967296) (mod (+ .cse0 36) 4294967296)) (= (mod (+ c_main_~k~0 24) 4294967296) (mod (+ .cse0 24) 4294967296)) (= (mod (+ c_main_~j~0 16) 4294967296) (mod (+ .cse1 16) 4294967296)) (= (mod (+ c_main_~j~0 10) 4294967296) (mod (+ .cse1 10) 4294967296)))) is different from false [2020-07-20 22:42:21,650 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_main_~i~0 2)) (.cse0 (* c_main_~i~0 3))) (and (= (mod (+ .cse0 15) 4294967296) (mod (+ c_main_~k~0 15) 4294967296)) (= (mod (+ .cse1 6) 4294967296) (mod (+ c_main_~j~0 6) 4294967296)) (= (mod (+ c_main_~k~0 6) 4294967296) (mod (+ .cse0 6) 4294967296)) (= (mod .cse1 4294967296) (mod c_main_~j~0 4294967296)) (= (mod (+ .cse1 12) 4294967296) (mod (+ c_main_~j~0 12) 4294967296)) (= (mod (+ c_main_~k~0 30) 4294967296) (mod (+ .cse0 30) 4294967296)) (= (mod (+ c_main_~j~0 20) 4294967296) (mod (+ .cse1 20) 4294967296)) (= (mod (+ .cse0 21) 4294967296) (mod (+ c_main_~k~0 21) 4294967296)) (= (mod (+ .cse0 18) 4294967296) (mod (+ c_main_~k~0 18) 4294967296)) (= (mod (+ .cse1 14) 4294967296) (mod (+ c_main_~j~0 14) 4294967296)) (= (mod (+ c_main_~k~0 3) 4294967296) (mod (+ .cse0 3) 4294967296)) (= (mod (+ c_main_~k~0 9) 4294967296) (mod (+ .cse0 9) 4294967296)) (= (mod (+ c_main_~j~0 4) 4294967296) (mod (+ .cse1 4) 4294967296)) (= (mod (+ c_main_~j~0 2) 4294967296) (mod (+ .cse1 2) 4294967296)) (= (mod (+ c_main_~k~0 24) 4294967296) (mod (+ .cse0 24) 4294967296)) (= (mod (+ c_main_~j~0 16) 4294967296) (mod (+ .cse1 16) 4294967296)) (= (mod (+ c_main_~j~0 10) 4294967296) (mod (+ .cse1 10) 4294967296)) (= (mod .cse0 4294967296) (mod c_main_~k~0 4294967296)))) is different from false [2020-07-20 22:42:23,676 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~i~0 3)) (.cse1 (* c_main_~i~0 2))) (and (= (mod (+ .cse0 15) 4294967296) (mod (+ c_main_~k~0 15) 4294967296)) (= (mod (+ .cse1 6) 4294967296) (mod (+ c_main_~j~0 6) 4294967296)) (= (mod (+ c_main_~k~0 6) 4294967296) (mod (+ .cse0 6) 4294967296)) (= (mod (+ .cse1 12) 4294967296) (mod (+ c_main_~j~0 12) 4294967296)) (= (mod (+ c_main_~k~0 30) 4294967296) (mod (+ .cse0 30) 4294967296)) (= (mod (+ c_main_~j~0 20) 4294967296) (mod (+ .cse1 20) 4294967296)) (= (mod (+ .cse0 21) 4294967296) (mod (+ c_main_~k~0 21) 4294967296)) (= (mod (+ .cse0 18) 4294967296) (mod (+ c_main_~k~0 18) 4294967296)) (= (mod (+ .cse1 14) 4294967296) (mod (+ c_main_~j~0 14) 4294967296)) (= (mod (+ c_main_~k~0 3) 4294967296) (mod (+ .cse0 3) 4294967296)) (= (mod (+ c_main_~k~0 9) 4294967296) (mod (+ .cse0 9) 4294967296)) (= (mod (+ c_main_~j~0 4) 4294967296) (mod (+ .cse1 4) 4294967296)) (= (mod (+ c_main_~j~0 2) 4294967296) (mod (+ .cse1 2) 4294967296)) (= (mod (+ c_main_~k~0 24) 4294967296) (mod (+ .cse0 24) 4294967296)) (= (mod (+ c_main_~j~0 16) 4294967296) (mod (+ .cse1 16) 4294967296)) (= (mod (+ c_main_~j~0 10) 4294967296) (mod (+ .cse1 10) 4294967296)))) is different from false [2020-07-20 22:42:23,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:42:23,687 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2020-07-20 22:42:23,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 22:42:23,687 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 82 [2020-07-20 22:42:23,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:42:23,689 INFO L225 Difference]: With dead ends: 54 [2020-07-20 22:42:23,689 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 22:42:23,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 385.2s TimeCoverageRelationStatistics Valid=272, Invalid=617, Unknown=183, NotChecked=260, Total=1332 [2020-07-20 22:42:23,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 22:42:23,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 22:42:23,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 22:42:23,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 22:42:23,694 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 82 [2020-07-20 22:42:23,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:42:23,695 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 22:42:23,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-20 22:42:23,695 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 22:42:23,695 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 22:42:23,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:42:23,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 22:42:24,208 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 327 [2020-07-20 22:42:24,334 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 327