/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 NUM_FUNCTIONS --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/sumt7.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 14:50:16,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:50:16,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:50:16,309 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 14:50:16,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 14:50:16,311 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 14:50:16,314 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 14:50:16,324 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 14:50:16,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 14:50:16,332 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 14:50:16,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 14:50:16,336 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 14:50:16,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:50:16,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:50:16,340 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:50:16,342 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:50:16,343 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:50:16,344 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:50:16,346 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:50:16,351 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:50:16,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:50:16,361 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:50:16,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:50:16,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:50:16,366 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 14:50:16,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 14:50:16,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 14:50:16,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 14:50:16,381 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 14:50:16,402 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:50:16,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:50:16,403 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:50:16,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:50:16,404 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:50:16,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:50:16,404 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:50:16,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:50:16,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:50:16,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:50:16,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:50:16,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:50:16,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:50:16,406 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:50:16,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:50:16,406 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:50:16,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:50:16,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:50:16,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:50:16,407 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:50:16,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:50:16,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:50:16,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:50:16,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:50:16,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:50:16,408 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:50:16,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:50:16,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:50:16,409 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:50:16,409 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 -> NUM_FUNCTIONS 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 14:50:16,699 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:50:16,724 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:50:16,728 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:50:16,730 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:50:16,730 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:50:16,732 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt7.c [2020-07-20 14:50:16,818 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c23a9ea3/ec0dc93a8d3243f8bbf6677008546cce/FLAGd09f1eba2 [2020-07-20 14:50:17,357 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:50:17,358 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt7.c [2020-07-20 14:50:17,367 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c23a9ea3/ec0dc93a8d3243f8bbf6677008546cce/FLAGd09f1eba2 [2020-07-20 14:50:17,686 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c23a9ea3/ec0dc93a8d3243f8bbf6677008546cce [2020-07-20 14:50:17,696 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:50:17,700 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:50:17,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:50:17,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:50:17,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:50:17,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:50:17" (1/1) ... [2020-07-20 14:50:17,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5853e384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:50:17, skipping insertion in model container [2020-07-20 14:50:17,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:50:17" (1/1) ... [2020-07-20 14:50:17,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:50:17,739 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:50:17,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:50:17,925 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:50:17,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:50:17,960 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:50:17,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:50:17 WrapperNode [2020-07-20 14:50:17,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:50:17,961 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:50:17,961 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:50:17,961 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:50:17,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:50:17" (1/1) ... [2020-07-20 14:50:17,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:50:17" (1/1) ... [2020-07-20 14:50:17,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:50:17" (1/1) ... [2020-07-20 14:50:17,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:50:17" (1/1) ... [2020-07-20 14:50:18,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:50:17" (1/1) ... [2020-07-20 14:50:18,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:50:17" (1/1) ... [2020-07-20 14:50:18,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:50:17" (1/1) ... [2020-07-20 14:50:18,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:50:18,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:50:18,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:50:18,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:50:18,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:50:17" (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 14:50:18,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:50:18,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:50:18,164 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 14:50:18,164 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 14:50:18,164 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:50:18,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:50:18,164 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 14:50:18,164 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 14:50:18,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 14:50:18,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 14:50:18,165 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:50:18,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:50:18,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:50:18,446 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:50:18,446 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 14:50:18,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:50:18 BoogieIcfgContainer [2020-07-20 14:50:18,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:50:18,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:50:18,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:50:18,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:50:18,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:50:17" (1/3) ... [2020-07-20 14:50:18,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ae8cb51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:50:18, skipping insertion in model container [2020-07-20 14:50:18,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:50:17" (2/3) ... [2020-07-20 14:50:18,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ae8cb51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:50:18, skipping insertion in model container [2020-07-20 14:50:18,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:50:18" (3/3) ... [2020-07-20 14:50:18,461 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt7.c [2020-07-20 14:50:18,472 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:50:18,482 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:50:18,499 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:50:18,534 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:50:18,534 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:50:18,534 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:50:18,535 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:50:18,535 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:50:18,535 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:50:18,536 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:50:18,536 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:50:18,570 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-20 14:50:18,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 14:50:18,587 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:50:18,588 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:50:18,589 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:50:18,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:50:18,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1473118151, now seen corresponding path program 1 times [2020-07-20 14:50:18,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:50:18,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397842233] [2020-07-20 14:50:18,619 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 14:50:18,718 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:50:18,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:50:18,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 14:50:18,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:50:18,942 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 14:50:18,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:50:18,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397842233] [2020-07-20 14:50:18,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:50:18,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 14:50:18,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229985577] [2020-07-20 14:50:18,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 14:50:18,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:50:18,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 14:50:18,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 14:50:18,973 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2020-07-20 14:50:19,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:50:19,225 INFO L93 Difference]: Finished difference Result 68 states and 99 transitions. [2020-07-20 14:50:19,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 14:50:19,228 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-07-20 14:50:19,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:50:19,240 INFO L225 Difference]: With dead ends: 68 [2020-07-20 14:50:19,241 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 14:50:19,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 14:50:19,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 14:50:19,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-07-20 14:50:19,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 14:50:19,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-07-20 14:50:19,298 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 14 [2020-07-20 14:50:19,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:50:19,299 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-07-20 14:50:19,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 14:50:19,300 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-07-20 14:50:19,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 14:50:19,301 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:50:19,301 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:50:19,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:50:19,516 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:50:19,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:50:19,518 INFO L82 PathProgramCache]: Analyzing trace with hash 633537884, now seen corresponding path program 1 times [2020-07-20 14:50:19,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:50:19,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722684054] [2020-07-20 14:50:19,519 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 14:50:19,604 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:50:19,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:50:19,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 14:50:19,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:50:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:50:19,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:50:19,863 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:50:20,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 14:50:20,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722684054] [2020-07-20 14:50:20,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 14:50:20,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2020-07-20 14:50:20,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006399544] [2020-07-20 14:50:20,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 14:50:20,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:50:20,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 14:50:20,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-07-20 14:50:20,087 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 6 states. [2020-07-20 14:50:32,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:50:32,677 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2020-07-20 14:50:32,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 14:50:32,678 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-07-20 14:50:32,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:50:32,680 INFO L225 Difference]: With dead ends: 52 [2020-07-20 14:50:32,680 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 14:50:32,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-20 14:50:32,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 14:50:32,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-07-20 14:50:32,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 14:50:32,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2020-07-20 14:50:32,692 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 27 [2020-07-20 14:50:32,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:50:32,693 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2020-07-20 14:50:32,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 14:50:32,693 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2020-07-20 14:50:32,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 14:50:32,694 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:50:32,695 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:50:32,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:50:32,896 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:50:32,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:50:32,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1461697819, now seen corresponding path program 1 times [2020-07-20 14:50:32,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:50:32,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547592311] [2020-07-20 14:50:32,899 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 14:50:32,965 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:50:32,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:50:32,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 14:50:32,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:50:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 14:50:33,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:50:33,198 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:50:39,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:50:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 9 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 14:50:51,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547592311] [2020-07-20 14:50:51,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:50:51,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-07-20 14:50:51,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397747998] [2020-07-20 14:50:51,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 14:50:51,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:50:51,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 14:50:51,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=61, Unknown=9, NotChecked=0, Total=110 [2020-07-20 14:50:51,986 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 11 states. [2020-07-20 14:50:54,268 WARN L860 $PredicateComparison]: unable to prove that (and (let ((.cse0 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)))) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (let ((.cse1 (+ c_main_~l~0 1))) (or (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296)) (= (mod (mod (mod .cse1 4294967296) 7) 4294967296) 0)))) is different from true [2020-07-20 14:50:56,352 WARN L838 $PredicateComparison]: unable to prove that (and (let ((.cse0 (+ c_main_~l~0 1))) (or (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)) (= (mod (mod (mod .cse0 4294967296) 7) 4294967296) 0))) (or (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod c_main_~l~0 4294967296) 7) 4294967296)))) is different from false [2020-07-20 14:50:58,425 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (let ((.cse0 (+ c_main_~l~0 1))) (or (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)) (= (mod (mod (mod .cse0 4294967296) 7) 4294967296) 0)))) is different from false [2020-07-20 14:51:00,495 WARN L860 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (let ((.cse0 (+ c_main_~l~0 1))) (or (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)) (= (mod (mod (mod .cse0 4294967296) 7) 4294967296) 0)))) is different from true [2020-07-20 14:53:29,386 WARN L193 SmtUtils]: Spent 19.13 s on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 14:53:54,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:53:54,892 INFO L93 Difference]: Finished difference Result 104 states and 143 transitions. [2020-07-20 14:53:54,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 14:53:54,898 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-07-20 14:53:54,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:53:54,903 INFO L225 Difference]: With dead ends: 104 [2020-07-20 14:53:54,904 INFO L226 Difference]: Without dead ends: 76 [2020-07-20 14:53:54,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 59.2s TimeCoverageRelationStatistics Valid=54, Invalid=72, Unknown=18, NotChecked=66, Total=210 [2020-07-20 14:53:54,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-20 14:53:54,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2020-07-20 14:53:54,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 14:53:54,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2020-07-20 14:53:54,929 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 36 [2020-07-20 14:53:54,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:53:54,930 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2020-07-20 14:53:54,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 14:53:54,930 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2020-07-20 14:53:54,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 14:53:54,932 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:53:54,932 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:53:55,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:53:55,137 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:53:55,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:53:55,138 INFO L82 PathProgramCache]: Analyzing trace with hash 782958555, now seen corresponding path program 1 times [2020-07-20 14:53:55,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:53:55,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225217957] [2020-07-20 14:53:55,140 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 14:53:55,220 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:53:55,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:53:55,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-20 14:53:55,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:53:55,449 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 14:53:55,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:53:55,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:54:25,506 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 17 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 14:54:25,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225217957] [2020-07-20 14:54:25,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:54:25,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-07-20 14:54:25,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640594101] [2020-07-20 14:54:25,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 14:54:25,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:54:25,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 14:54:25,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=230, Unknown=13, NotChecked=0, Total=306 [2020-07-20 14:54:25,509 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand 18 states. [2020-07-20 14:55:26,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:55:26,563 INFO L93 Difference]: Finished difference Result 145 states and 202 transitions. [2020-07-20 14:55:26,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 14:55:26,566 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-07-20 14:55:26,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:55:26,567 INFO L225 Difference]: With dead ends: 145 [2020-07-20 14:55:26,567 INFO L226 Difference]: Without dead ends: 111 [2020-07-20 14:55:26,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 39.9s TimeCoverageRelationStatistics Valid=67, Invalid=262, Unknown=13, NotChecked=0, Total=342 [2020-07-20 14:55:26,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-07-20 14:55:26,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2020-07-20 14:55:26,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-20 14:55:26,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 144 transitions. [2020-07-20 14:55:26,594 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 144 transitions. Word has length 40 [2020-07-20 14:55:26,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:55:26,594 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 144 transitions. [2020-07-20 14:55:26,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 14:55:26,594 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 144 transitions. [2020-07-20 14:55:26,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 14:55:26,596 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:55:26,597 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:55:26,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:55:26,803 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:55:26,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:55:26,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1571070263, now seen corresponding path program 1 times [2020-07-20 14:55:26,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:55:26,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712707102] [2020-07-20 14:55:26,805 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 [2020-07-20 14:55:27,248 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:55:27,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:55:27,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 14:55:27,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:55:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 48 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-20 14:55:27,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:55:27,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:55:33,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:55:40,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:55:48,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:55:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 44 refuted. 4 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-20 14:55:59,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712707102] [2020-07-20 14:55:59,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:55:59,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2020-07-20 14:55:59,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674401166] [2020-07-20 14:55:59,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 14:55:59,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:55:59,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 14:55:59,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=91, Unknown=15, NotChecked=0, Total=156 [2020-07-20 14:55:59,595 INFO L87 Difference]: Start difference. First operand 109 states and 144 transitions. Second operand 13 states. [2020-07-20 14:56:01,891 WARN L838 $PredicateComparison]: unable to prove that (and (let ((.cse0 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)))) (let ((.cse1 (+ c_main_~l~0 4))) (or (= 0 (mod (mod (mod .cse1 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296)))) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (let ((.cse2 (+ c_main_~l~0 3))) (or (= (mod (mod (mod .cse2 4294967296) 7) 4294967296) 0) (< 0 (mod (mod (mod .cse2 4294967296) 6) 4294967296))))) is different from false [2020-07-20 14:56:04,012 WARN L838 $PredicateComparison]: unable to prove that (and (let ((.cse0 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)))) (let ((.cse1 (+ c_main_~l~0 3))) (or (= (mod (mod (mod .cse1 4294967296) 7) 4294967296) 0) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296)))) (or (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod c_main_~l~0 4294967296) 7) 4294967296)))) is different from false [2020-07-20 14:56:06,124 WARN L838 $PredicateComparison]: unable to prove that (and (let ((.cse0 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)))) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (let ((.cse1 (+ c_main_~l~0 3))) (or (= (mod (mod (mod .cse1 4294967296) 7) 4294967296) 0) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296))))) is different from false [2020-07-20 14:56:08,256 WARN L860 $PredicateComparison]: unable to prove that (and (let ((.cse0 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)))) (let ((.cse1 (+ c_main_~l~0 3))) (or (= (mod (mod (mod .cse1 4294967296) 7) 4294967296) 0) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296))))) is different from true [2020-07-20 14:57:01,234 WARN L838 $PredicateComparison]: unable to prove that (and (let ((.cse0 (+ c_main_~l~0 1))) (or (= 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)))) (or (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod c_main_~l~0 4294967296) 7) 4294967296)))) is different from false [2020-07-20 14:57:16,066 WARN L838 $PredicateComparison]: unable to prove that (and (let ((.cse0 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)))) (or (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod c_main_~l~0 4294967296) 7) 4294967296)))) is different from false [2020-07-20 14:57:37,411 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (let ((.cse0 (+ c_main_~l~0 1))) (or (= 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296))))) is different from false [2020-07-20 14:57:56,534 WARN L838 $PredicateComparison]: unable to prove that (and (let ((.cse0 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)))) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296))) is different from false [2020-07-20 14:58:13,432 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (let ((.cse0 (+ c_main_~l~0 3))) (or (= (mod (mod (mod .cse0 4294967296) 7) 4294967296) 0) (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)))) (let ((.cse1 (+ c_main_~l~0 1))) (or (= 0 (mod (mod (mod .cse1 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296))))) is different from false [2020-07-20 14:59:06,648 WARN L193 SmtUtils]: Spent 25.48 s on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 15:00:16,004 WARN L860 $PredicateComparison]: unable to prove that (and (let ((.cse0 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)))) (let ((.cse1 (+ c_main_~l~0 4))) (or (= 0 (mod (mod (mod .cse1 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296)))) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296))) is different from true [2020-07-20 15:00:22,350 WARN L838 $PredicateComparison]: unable to prove that (and (let ((.cse0 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)))) (let ((.cse1 (+ c_main_~l~0 4))) (or (= 0 (mod (mod (mod .cse1 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296)))) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (let ((.cse2 (+ c_main_~l~0 1))) (or (= 0 (mod (mod (mod .cse2 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod .cse2 4294967296) 6) 4294967296))))) is different from false [2020-07-20 15:00:24,555 WARN L838 $PredicateComparison]: unable to prove that (and (let ((.cse0 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)))) (let ((.cse1 (+ c_main_~l~0 3))) (or (= (mod (mod (mod .cse1 4294967296) 7) 4294967296) 0) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296)))) (let ((.cse2 (+ c_main_~l~0 1))) (or (= 0 (mod (mod (mod .cse2 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod .cse2 4294967296) 6) 4294967296))))) is different from false [2020-07-20 15:00:31,432 WARN L838 $PredicateComparison]: unable to prove that (and (let ((.cse0 (+ c_main_~l~0 3))) (or (= (mod (mod (mod .cse0 4294967296) 7) 4294967296) 0) (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)))) (let ((.cse1 (+ c_main_~l~0 1))) (or (= 0 (mod (mod (mod .cse1 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296)))) (or (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod c_main_~l~0 4294967296) 7) 4294967296)))) is different from false [2020-07-20 15:00:33,541 WARN L838 $PredicateComparison]: unable to prove that (and (let ((.cse0 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)))) (let ((.cse1 (+ c_main_~l~0 1))) (or (= 0 (mod (mod (mod .cse1 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296)))) (or (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod c_main_~l~0 4294967296) 7) 4294967296)))) is different from false [2020-07-20 15:00:35,670 WARN L860 $PredicateComparison]: unable to prove that (and (let ((.cse0 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)))) (let ((.cse1 (+ c_main_~l~0 1))) (or (= 0 (mod (mod (mod .cse1 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296)))) (or (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod c_main_~l~0 4294967296) 7) 4294967296)))) is different from true [2020-07-20 15:01:13,672 WARN L838 $PredicateComparison]: unable to prove that (and (let ((.cse0 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)))) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (let ((.cse1 (+ c_main_~l~0 1))) (or (= 0 (mod (mod (mod .cse1 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296))))) is different from false [2020-07-20 15:01:53,756 WARN L838 $PredicateComparison]: unable to prove that (and (let ((.cse0 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)))) (let ((.cse1 (+ c_main_~l~0 1))) (or (= 0 (mod (mod (mod .cse1 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296))))) is different from false [2020-07-20 15:02:13,489 WARN L838 $PredicateComparison]: unable to prove that (and (let ((.cse0 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)))) (let ((.cse1 (+ c_main_~l~0 4))) (or (= 0 (mod (mod (mod .cse1 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296)))) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (let ((.cse2 (+ c_main_~l~0 3))) (or (= (mod (mod (mod .cse2 4294967296) 7) 4294967296) 0) (< 0 (mod (mod (mod .cse2 4294967296) 6) 4294967296)))) (let ((.cse3 (+ c_main_~l~0 1))) (or (= 0 (mod (mod (mod .cse3 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod .cse3 4294967296) 6) 4294967296))))) is different from false [2020-07-20 15:02:15,605 WARN L860 $PredicateComparison]: unable to prove that (and (let ((.cse0 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)))) (let ((.cse1 (+ c_main_~l~0 4))) (or (= 0 (mod (mod (mod .cse1 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296)))) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (let ((.cse2 (+ c_main_~l~0 3))) (or (= (mod (mod (mod .cse2 4294967296) 7) 4294967296) 0) (< 0 (mod (mod (mod .cse2 4294967296) 6) 4294967296)))) (let ((.cse3 (+ c_main_~l~0 1))) (or (= 0 (mod (mod (mod .cse3 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod .cse3 4294967296) 6) 4294967296))))) is different from true [2020-07-20 15:02:17,701 WARN L838 $PredicateComparison]: unable to prove that (and (let ((.cse0 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)))) (let ((.cse1 (+ c_main_~l~0 3))) (or (= (mod (mod (mod .cse1 4294967296) 7) 4294967296) 0) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296)))) (let ((.cse2 (+ c_main_~l~0 1))) (or (= 0 (mod (mod (mod .cse2 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod .cse2 4294967296) 6) 4294967296)))) (or (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod c_main_~l~0 4294967296) 7) 4294967296)))) is different from false [2020-07-20 15:02:19,717 WARN L860 $PredicateComparison]: unable to prove that (and (let ((.cse0 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)))) (let ((.cse1 (+ c_main_~l~0 3))) (or (= (mod (mod (mod .cse1 4294967296) 7) 4294967296) 0) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296)))) (let ((.cse2 (+ c_main_~l~0 1))) (or (= 0 (mod (mod (mod .cse2 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod .cse2 4294967296) 6) 4294967296)))) (or (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod c_main_~l~0 4294967296) 7) 4294967296)))) is different from true [2020-07-20 15:02:21,814 WARN L838 $PredicateComparison]: unable to prove that (and (let ((.cse0 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)))) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (let ((.cse1 (+ c_main_~l~0 3))) (or (= (mod (mod (mod .cse1 4294967296) 7) 4294967296) 0) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296)))) (let ((.cse2 (+ c_main_~l~0 1))) (or (= 0 (mod (mod (mod .cse2 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod .cse2 4294967296) 6) 4294967296))))) is different from false [2020-07-20 15:02:21,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:02:21,821 INFO L93 Difference]: Finished difference Result 245 states and 353 transitions. [2020-07-20 15:02:21,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 15:02:21,822 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-07-20 15:02:21,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:02:21,824 INFO L225 Difference]: With dead ends: 245 [2020-07-20 15:02:21,824 INFO L226 Difference]: Without dead ends: 179 [2020-07-20 15:02:21,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 19 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 121.9s TimeCoverageRelationStatistics Valid=96, Invalid=117, Unknown=45, NotChecked=798, Total=1056 [2020-07-20 15:02:21,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-07-20 15:02:21,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 155. [2020-07-20 15:02:21,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-07-20 15:02:21,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 216 transitions. [2020-07-20 15:02:21,846 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 216 transitions. Word has length 61 [2020-07-20 15:02:21,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:02:21,846 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 216 transitions. [2020-07-20 15:02:21,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 15:02:21,847 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 216 transitions. [2020-07-20 15:02:21,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-07-20 15:02:21,848 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:02:21,848 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:02:22,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:02:22,054 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:02:22,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:02:22,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1783764686, now seen corresponding path program 1 times [2020-07-20 15:02:22,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:02:22,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568490845] [2020-07-20 15:02:22,056 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 [2020-07-20 15:02:22,349 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 15:02:22,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:02:22,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-20 15:02:22,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:02:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-20 15:02:22,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 15:02:22,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 15:03:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 0 refuted. 40 times theorem prover too weak. 46 trivial. 0 not checked. [2020-07-20 15:03:03,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568490845] [2020-07-20 15:03:03,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 15:03:03,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2020-07-20 15:03:03,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748148494] [2020-07-20 15:03:03,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 15:03:03,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:03:03,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 15:03:03,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=364, Unknown=11, NotChecked=0, Total=462 [2020-07-20 15:03:03,701 INFO L87 Difference]: Start difference. First operand 155 states and 216 transitions. Second operand 22 states. [2020-07-20 15:03:21,213 WARN L193 SmtUtils]: Spent 4.25 s on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 15:03:57,487 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 23 DAG size of output: 14 [2020-07-20 15:04:25,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:04:25,149 INFO L93 Difference]: Finished difference Result 327 states and 491 transitions. [2020-07-20 15:04:25,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 15:04:25,154 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 63 [2020-07-20 15:04:25,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:04:25,157 INFO L225 Difference]: With dead ends: 327 [2020-07-20 15:04:25,157 INFO L226 Difference]: Without dead ends: 232 [2020-07-20 15:04:25,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 99 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 73.2s TimeCoverageRelationStatistics Valid=113, Invalid=464, Unknown=23, NotChecked=0, Total=600 [2020-07-20 15:04:25,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-07-20 15:04:25,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2020-07-20 15:04:25,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-20 15:04:25,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 336 transitions. [2020-07-20 15:04:25,184 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 336 transitions. Word has length 63 [2020-07-20 15:04:25,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:04:25,184 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 336 transitions. [2020-07-20 15:04:25,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 15:04:25,185 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 336 transitions. [2020-07-20 15:04:25,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-20 15:04:25,186 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:04:25,186 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:04:25,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:25,402 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:04:25,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:04:25,403 INFO L82 PathProgramCache]: Analyzing trace with hash 2065144187, now seen corresponding path program 1 times [2020-07-20 15:04:25,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:04:25,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970455483] [2020-07-20 15:04:25,404 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:25,568 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 15:04:25,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:04:25,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-20 15:04:25,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:04:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 12 proven. 119 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-20 15:04:26,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 15:04:26,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts