/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_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 17:14:25,847 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 17:14:25,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 17:14:25,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 17:14:25,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 17:14:25,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 17:14:25,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 17:14:25,866 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 17:14:25,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 17:14:25,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 17:14:25,869 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 17:14:25,871 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 17:14:25,871 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 17:14:25,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 17:14:25,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 17:14:25,874 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 17:14:25,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 17:14:25,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 17:14:25,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 17:14:25,879 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 17:14:25,881 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 17:14:25,882 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 17:14:25,883 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 17:14:25,884 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 17:14:25,886 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 17:14:25,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 17:14:25,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 17:14:25,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 17:14:25,896 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 17:14:25,911 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 17:14:25,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 17:14:25,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 17:14:25,912 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 17:14:25,913 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 17:14:25,913 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 17:14:25,913 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 17:14:25,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 17:14:25,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 17:14:25,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 17:14:25,914 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 17:14:25,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 17:14:25,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 17:14:25,914 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 17:14:25,915 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 17:14:25,915 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 17:14:25,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 17:14:25,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 17:14:25,915 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 17:14:25,916 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 17:14:25,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 17:14:25,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:14:25,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 17:14:25,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 17:14:25,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 17:14:25,917 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 17:14:25,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:14:25,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 17:14:25,917 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 17:14:25,917 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_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 17:14:26,237 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 17:14:26,250 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 17:14:26,253 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 17:14:26,254 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 17:14:26,255 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 17:14:26,255 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt8.c [2020-07-21 17:14:26,328 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcb2fdc03/1294f7be72f641559bad17f466b3bdc7/FLAG4881c9763 [2020-07-21 17:14:26,729 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 17:14:26,730 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt8.c [2020-07-21 17:14:26,737 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcb2fdc03/1294f7be72f641559bad17f466b3bdc7/FLAG4881c9763 [2020-07-21 17:14:27,105 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcb2fdc03/1294f7be72f641559bad17f466b3bdc7 [2020-07-21 17:14:27,114 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 17:14:27,117 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 17:14:27,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 17:14:27,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 17:14:27,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 17:14:27,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:14:27" (1/1) ... [2020-07-21 17:14:27,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69fc279c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:14:27, skipping insertion in model container [2020-07-21 17:14:27,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:14:27" (1/1) ... [2020-07-21 17:14:27,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 17:14:27,151 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 17:14:27,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:14:27,356 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 17:14:27,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:14:27,399 INFO L208 MainTranslator]: Completed translation [2020-07-21 17:14:27,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:14:27 WrapperNode [2020-07-21 17:14:27,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 17:14:27,401 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 17:14:27,401 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 17:14:27,401 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 17:14:27,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:14:27" (1/1) ... [2020-07-21 17:14:27,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:14:27" (1/1) ... [2020-07-21 17:14:27,548 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:14:27" (1/1) ... [2020-07-21 17:14:27,548 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:14:27" (1/1) ... [2020-07-21 17:14:27,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:14:27" (1/1) ... [2020-07-21 17:14:27,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:14:27" (1/1) ... [2020-07-21 17:14:27,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:14:27" (1/1) ... [2020-07-21 17:14:27,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 17:14:27,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 17:14:27,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 17:14:27,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 17:14:27,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:14:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:14:27,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 17:14:27,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 17:14:27,657 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 17:14:27,657 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 17:14:27,658 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 17:14:27,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 17:14:27,658 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 17:14:27,659 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 17:14:27,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 17:14:27,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 17:14:27,660 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 17:14:27,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 17:14:27,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 17:14:27,923 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 17:14:27,923 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 17:14:27,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:14:27 BoogieIcfgContainer [2020-07-21 17:14:27,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 17:14:27,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 17:14:27,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 17:14:27,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 17:14:27,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:14:27" (1/3) ... [2020-07-21 17:14:27,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b7e654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:14:27, skipping insertion in model container [2020-07-21 17:14:27,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:14:27" (2/3) ... [2020-07-21 17:14:27,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b7e654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:14:27, skipping insertion in model container [2020-07-21 17:14:27,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:14:27" (3/3) ... [2020-07-21 17:14:27,935 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt8.c [2020-07-21 17:14:27,944 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 17:14:27,951 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 17:14:27,964 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 17:14:27,988 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 17:14:27,988 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 17:14:27,988 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 17:14:27,988 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 17:14:27,988 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 17:14:27,989 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 17:14:27,989 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 17:14:27,989 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 17:14:28,009 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-07-21 17:14:28,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 17:14:28,015 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:14:28,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:14:28,016 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:14:28,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:14:28,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1078562183, now seen corresponding path program 1 times [2020-07-21 17:14:28,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:14:28,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301191552] [2020-07-21 17:14:28,032 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:14:28,116 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:14:28,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:14:28,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 17:14:28,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:14:28,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:14:28,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:14:28,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301191552] [2020-07-21 17:14:28,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:14:28,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 17:14:28,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866805730] [2020-07-21 17:14:28,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 17:14:28,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:14:28,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 17:14:28,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 17:14:28,458 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 7 states. [2020-07-21 17:14:28,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:14:28,757 INFO L93 Difference]: Finished difference Result 71 states and 105 transitions. [2020-07-21 17:14:28,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 17:14:28,759 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-07-21 17:14:28,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:14:28,772 INFO L225 Difference]: With dead ends: 71 [2020-07-21 17:14:28,772 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 17:14:28,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 17:14:28,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 17:14:28,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-21 17:14:28,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 17:14:28,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-07-21 17:14:28,820 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 14 [2020-07-21 17:14:28,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:14:28,821 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-07-21 17:14:28,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 17:14:28,821 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-07-21 17:14:28,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 17:14:28,822 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:14:28,823 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, 1] [2020-07-21 17:14:29,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:14:29,024 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:14:29,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:14:29,025 INFO L82 PathProgramCache]: Analyzing trace with hash -858115487, now seen corresponding path program 1 times [2020-07-21 17:14:29,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:14:29,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905695931] [2020-07-21 17:14:29,027 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:14:29,079 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:14:29,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:14:29,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-21 17:14:29,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:14:29,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:14:29,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:14:29,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:14:29,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 17:14:29,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905695931] [2020-07-21 17:14:29,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 17:14:29,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2020-07-21 17:14:29,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871737594] [2020-07-21 17:14:29,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 17:14:29,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:14:29,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 17:14:29,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-07-21 17:14:29,613 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 6 states. [2020-07-21 17:14:42,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:14:42,228 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-07-21 17:14:42,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 17:14:42,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-07-21 17:14:42,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:14:42,231 INFO L225 Difference]: With dead ends: 55 [2020-07-21 17:14:42,231 INFO L226 Difference]: Without dead ends: 53 [2020-07-21 17:14:42,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-21 17:14:42,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-21 17:14:42,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-07-21 17:14:42,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-21 17:14:42,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2020-07-21 17:14:42,242 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 28 [2020-07-21 17:14:42,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:14:42,243 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2020-07-21 17:14:42,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 17:14:42,243 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2020-07-21 17:14:42,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-21 17:14:42,244 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:14:42,245 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, 1] [2020-07-21 17:14:42,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:14:42,459 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:14:42,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:14:42,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1617304246, now seen corresponding path program 1 times [2020-07-21 17:14:42,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:14:42,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145211321] [2020-07-21 17:14:42,462 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:14:42,501 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:14:42,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:14:42,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 17:14:42,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:14:42,534 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 17:14:42,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:14:50,906 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 9 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 17:14:50,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145211321] [2020-07-21 17:14:50,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:14:50,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 17:14:50,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530353224] [2020-07-21 17:14:50,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 17:14:50,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:14:50,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 17:14:50,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=31, Unknown=4, NotChecked=0, Total=56 [2020-07-21 17:14:50,909 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand 8 states. [2020-07-21 17:14:53,116 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod c_main_~l~0 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 7) 4294967296))) is different from false [2020-07-21 17:14:55,213 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod c_main_~l~0 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 7) 4294967296))) is different from false [2020-07-21 17:16:28,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:16:28,236 INFO L93 Difference]: Finished difference Result 115 states and 165 transitions. [2020-07-21 17:16:28,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 17:16:28,303 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-07-21 17:16:28,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:16:28,307 INFO L225 Difference]: With dead ends: 115 [2020-07-21 17:16:28,307 INFO L226 Difference]: Without dead ends: 85 [2020-07-21 17:16:28,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=25, Invalid=33, Unknown=6, NotChecked=26, Total=90 [2020-07-21 17:16:28,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-21 17:16:28,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2020-07-21 17:16:28,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-21 17:16:28,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 109 transitions. [2020-07-21 17:16:28,334 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 109 transitions. Word has length 37 [2020-07-21 17:16:28,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:16:28,334 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 109 transitions. [2020-07-21 17:16:28,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 17:16:28,335 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 109 transitions. [2020-07-21 17:16:28,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 17:16:28,338 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:16:28,339 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:16:28,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:16:28,553 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:16:28,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:16:28,554 INFO L82 PathProgramCache]: Analyzing trace with hash 964983039, now seen corresponding path program 1 times [2020-07-21 17:16:28,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:16:28,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495923634] [2020-07-21 17:16:28,556 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:16:28,602 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:16:28,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:16:28,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 17:16:28,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:16:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 17:16:29,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:16:29,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:16:33,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:16:41,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:16:48,222 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 12 proven. 18 refuted. 10 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 17:16:48,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495923634] [2020-07-21 17:16:48,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:16:48,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-07-21 17:16:48,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912651680] [2020-07-21 17:16:48,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 17:16:48,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:16:48,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 17:16:48,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=142, Unknown=10, NotChecked=0, Total=210 [2020-07-21 17:16:48,225 INFO L87 Difference]: Start difference. First operand 83 states and 109 transitions. Second operand 15 states. [2020-07-21 17:16:50,669 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~n~0 4294967296))) (and (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (= c_~SIZE~0 20000001) (let ((.cse1 (+ c_main_~l~0 1))) (or (<= .cse0 (mod .cse1 4294967296)) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296)))) (let ((.cse2 (+ c_main_~l~0 3))) (or (<= .cse0 (mod .cse2 4294967296)) (< 0 (mod (mod (mod .cse2 4294967296) 6) 4294967296)))))) is different from false [2020-07-21 17:17:13,495 WARN L193 SmtUtils]: Spent 14.49 s on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 17:17:19,688 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 (<= (mod c_main_~n~0 4294967296) (mod .cse0 4294967296)) (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296))))) is different from false [2020-07-21 17:17:27,994 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~n~0 4294967296))) (and (let ((.cse1 (+ c_main_~l~0 1))) (or (<= .cse0 (mod .cse1 4294967296)) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296)))) (let ((.cse2 (+ c_main_~l~0 3))) (or (<= .cse0 (mod .cse2 4294967296)) (< 0 (mod (mod (mod .cse2 4294967296) 6) 4294967296)))))) is different from false [2020-07-21 17:17:30,059 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~n~0 4294967296))) (and (let ((.cse1 (+ c_main_~l~0 1))) (or (<= .cse0 (mod .cse1 4294967296)) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296)))) (let ((.cse2 (+ c_main_~l~0 3))) (or (<= .cse0 (mod .cse2 4294967296)) (< 0 (mod (mod (mod .cse2 4294967296) 6) 4294967296)))))) is different from true [2020-07-21 17:17:34,201 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~n~0 4294967296))) (and (or (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (<= .cse0 (mod c_main_~l~0 4294967296))) (let ((.cse1 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296)) (<= .cse0 (mod .cse1 4294967296)))))) is different from false [2020-07-21 17:17:36,268 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~n~0 4294967296))) (and (or (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (<= .cse0 (mod c_main_~l~0 4294967296))) (let ((.cse1 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296)) (<= .cse0 (mod .cse1 4294967296)))))) is different from true [2020-07-21 17:18:05,907 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~n~0 4294967296))) (and (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (let ((.cse1 (+ c_main_~l~0 1))) (or (<= .cse0 (mod .cse1 4294967296)) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296)))) (let ((.cse2 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse2 4294967296) 6) 4294967296)) (<= .cse0 (mod .cse2 4294967296)))))) is different from true [2020-07-21 17:18:16,526 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 2))) (or (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)) (<= (mod c_main_~n~0 4294967296) (mod .cse0 4294967296))))) is different from false [2020-07-21 17:18:35,608 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~n~0 4294967296))) (and (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (let ((.cse1 (+ c_main_~l~0 1))) (or (<= .cse0 (mod .cse1 4294967296)) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296)))) (let ((.cse2 (+ c_main_~l~0 3))) (or (<= .cse0 (mod .cse2 4294967296)) (< 0 (mod (mod (mod .cse2 4294967296) 6) 4294967296)))))) is different from false [2020-07-21 17:19:49,916 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~n~0 4294967296))) (and (let ((.cse1 (+ c_main_~l~0 1))) (or (<= .cse0 (mod .cse1 4294967296)) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296)))) (let ((.cse2 (+ c_main_~l~0 3))) (or (<= .cse0 (mod .cse2 4294967296)) (< 0 (mod (mod (mod .cse2 4294967296) 6) 4294967296)))) (let ((.cse3 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse3 4294967296) 6) 4294967296)) (<= .cse0 (mod .cse3 4294967296)))))) is different from false [2020-07-21 17:20:00,518 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~n~0 4294967296))) (and (or (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (<= .cse0 (mod c_main_~l~0 4294967296))) (let ((.cse1 (+ c_main_~l~0 1))) (or (<= .cse0 (mod .cse1 4294967296)) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296)))) (let ((.cse2 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse2 4294967296) 6) 4294967296)) (<= .cse0 (mod .cse2 4294967296)))))) is different from false [2020-07-21 17:20:38,924 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~n~0 4294967296))) (and (let ((.cse1 (+ c_main_~l~0 1))) (or (<= .cse0 (mod .cse1 4294967296)) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296)))) (let ((.cse2 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse2 4294967296) 6) 4294967296)) (<= .cse0 (mod .cse2 4294967296)))) (let ((.cse3 (+ c_main_~l~0 3))) (or (<= .cse0 (mod .cse3 4294967296)) (< 0 (mod (mod (mod .cse3 4294967296) 6) 4294967296)) (< (mod c_~SIZE~0 4294967296) (mod c_main_~n~0 4294967296)))))) is different from false [2020-07-21 17:20:41,048 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~n~0 4294967296))) (and (let ((.cse1 (+ c_main_~l~0 1))) (or (<= .cse0 (mod .cse1 4294967296)) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296)))) (let ((.cse2 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse2 4294967296) 6) 4294967296)) (<= .cse0 (mod .cse2 4294967296)))) (let ((.cse3 (+ c_main_~l~0 3))) (or (<= .cse0 (mod .cse3 4294967296)) (< 0 (mod (mod (mod .cse3 4294967296) 6) 4294967296)) (< (mod c_~SIZE~0 4294967296) (mod c_main_~n~0 4294967296)))))) is different from true [2020-07-21 17:21:29,947 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~n~0 4294967296))) (and (let ((.cse1 (+ c_main_~l~0 1))) (or (<= .cse0 (mod .cse1 4294967296)) (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296)))) (let ((.cse2 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse2 4294967296) 6) 4294967296)) (<= .cse0 (mod .cse2 4294967296)))))) is different from false [2020-07-21 17:21:29,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:21:29,951 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2020-07-21 17:21:29,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 17:21:29,951 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2020-07-21 17:21:29,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:21:29,954 INFO L225 Difference]: With dead ends: 152 [2020-07-21 17:21:29,954 INFO L226 Difference]: Without dead ends: 111 [2020-07-21 17:21:29,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 72.2s TimeCoverageRelationStatistics Valid=129, Invalid=268, Unknown=27, NotChecked=506, Total=930 [2020-07-21 17:21:29,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-07-21 17:21:29,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 104. [2020-07-21 17:21:29,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-07-21 17:21:29,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 140 transitions. [2020-07-21 17:21:29,972 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 140 transitions. Word has length 52 [2020-07-21 17:21:29,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:21:29,973 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 140 transitions. [2020-07-21 17:21:29,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 17:21:29,973 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 140 transitions. [2020-07-21 17:21:29,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 17:21:29,975 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:21:29,975 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:21:30,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:21:30,182 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:21:30,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:21:30,183 INFO L82 PathProgramCache]: Analyzing trace with hash 2133368278, now seen corresponding path program 1 times [2020-07-21 17:21:30,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:21:30,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026130059] [2020-07-21 17:21:30,184 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:21:30,242 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:21:30,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:21:30,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-21 17:21:30,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:21:30,547 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 17:21:30,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:21:30,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:22:32,834 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 0 refuted. 37 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-21 17:22:32,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026130059] [2020-07-21 17:22:32,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:22:32,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2020-07-21 17:22:32,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984425261] [2020-07-21 17:22:32,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 17:22:32,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:22:32,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 17:22:32,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=318, Unknown=24, NotChecked=0, Total=420 [2020-07-21 17:22:32,837 INFO L87 Difference]: Start difference. First operand 104 states and 140 transitions. Second operand 21 states. [2020-07-21 17:22:46,093 WARN L193 SmtUtils]: Spent 4.27 s on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 17:23:00,876 WARN L193 SmtUtils]: Spent 6.33 s on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 17:24:13,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:24:13,836 INFO L93 Difference]: Finished difference Result 236 states and 351 transitions. [2020-07-21 17:24:13,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 17:24:13,955 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-07-21 17:24:13,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:24:13,958 INFO L225 Difference]: With dead ends: 236 [2020-07-21 17:24:13,958 INFO L226 Difference]: Without dead ends: 178 [2020-07-21 17:24:13,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 102.2s TimeCoverageRelationStatistics Valid=103, Invalid=417, Unknown=32, NotChecked=0, Total=552 [2020-07-21 17:24:13,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-21 17:24:13,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 168. [2020-07-21 17:24:13,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-07-21 17:24:13,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 240 transitions. [2020-07-21 17:24:13,987 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 240 transitions. Word has length 55 [2020-07-21 17:24:13,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:24:13,987 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 240 transitions. [2020-07-21 17:24:13,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 17:24:13,987 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 240 transitions. [2020-07-21 17:24:13,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-07-21 17:24:13,990 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:24:13,990 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:24:14,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:14,194 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:24:14,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:24:14,195 INFO L82 PathProgramCache]: Analyzing trace with hash 548921926, now seen corresponding path program 1 times [2020-07-21 17:24:14,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:24:14,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270758194] [2020-07-21 17:24:14,196 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:14,248 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:24:14,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:24:14,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 17:24:14,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:24:14,296 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 20 proven. 82 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-21 17:24:14,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:24:37,924 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 20 proven. 78 refuted. 4 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-21 17:24:37,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270758194] [2020-07-21 17:24:37,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:24:37,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-21 17:24:37,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669971005] [2020-07-21 17:24:37,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 17:24:37,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:24:37,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 17:24:37,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=115, Unknown=11, NotChecked=0, Total=182 [2020-07-21 17:24:37,930 INFO L87 Difference]: Start difference. First operand 168 states and 240 transitions. Second operand 14 states. [2020-07-21 17:24:40,325 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 4) 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 5) 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 3) 4294967296) 7) 4294967296))) is different from false [2020-07-21 17:24:42,422 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 4) 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 3) 4294967296) 7) 4294967296))) is different from false [2020-07-21 17:24:44,555 WARN L860 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 4) 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 3) 4294967296) 7) 4294967296))) is different from true [2020-07-21 17:24:46,667 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 4) 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 3) 4294967296) 7) 4294967296))) is different from false [2020-07-21 17:24:48,798 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 4) 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 3) 4294967296) 7) 4294967296))) is different from false [2020-07-21 17:25:43,854 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod c_main_~l~0 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 7) 4294967296))) is different from false [2020-07-21 17:25:50,236 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod c_main_~l~0 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 7) 4294967296))) is different from false [2020-07-21 17:25:56,619 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod c_main_~l~0 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 3) 4294967296) 7) 4294967296))) is different from false [2020-07-21 17:28:48,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:48,842 INFO L93 Difference]: Finished difference Result 379 states and 583 transitions. [2020-07-21 17:28:48,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-21 17:28:48,977 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 76 [2020-07-21 17:28:48,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:48,980 INFO L225 Difference]: With dead ends: 379 [2020-07-21 17:28:48,980 INFO L226 Difference]: Without dead ends: 265 [2020-07-21 17:28:48,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 40.5s TimeCoverageRelationStatistics Valid=70, Invalid=121, Unknown=19, NotChecked=210, Total=420 [2020-07-21 17:28:48,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-07-21 17:28:49,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 261. [2020-07-21 17:28:49,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-07-21 17:28:49,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 385 transitions. [2020-07-21 17:28:49,015 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 385 transitions. Word has length 76 [2020-07-21 17:28:49,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:28:49,016 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 385 transitions. [2020-07-21 17:28:49,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 17:28:49,016 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 385 transitions. [2020-07-21 17:28:49,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 17:28:49,017 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:28:49,018 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:28:49,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:49,235 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:28:49,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:28:49,235 INFO L82 PathProgramCache]: Analyzing trace with hash -806502463, now seen corresponding path program 1 times [2020-07-21 17:28:49,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:28:49,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833628989] [2020-07-21 17:28:49,237 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 17:28:49,318 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:28:49,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:28:49,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 45 conjunts are in the unsatisfiable core [2020-07-21 17:28:49,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:28:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-21 17:28:49,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:28:49,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts