/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/fermat2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 04:06:02,756 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 04:06:02,759 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 04:06:02,778 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 04:06:02,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 04:06:02,780 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 04:06:02,783 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 04:06:02,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 04:06:02,796 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 04:06:02,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 04:06:02,801 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 04:06:02,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 04:06:02,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 04:06:02,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 04:06:02,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 04:06:02,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 04:06:02,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 04:06:02,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 04:06:02,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 04:06:02,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 04:06:02,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 04:06:02,826 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 04:06:02,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 04:06:02,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 04:06:02,831 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 04:06:02,840 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 04:06:02,841 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 04:06:02,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 04:06:02,843 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 04:06:02,881 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 04:06:02,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 04:06:02,884 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 04:06:02,884 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 04:06:02,884 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 04:06:02,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 04:06:02,885 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 04:06:02,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 04:06:02,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 04:06:02,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 04:06:02,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 04:06:02,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 04:06:02,889 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 04:06:02,889 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 04:06:02,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 04:06:02,889 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 04:06:02,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 04:06:02,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 04:06:02,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 04:06:02,892 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 04:06:02,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 04:06:02,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 04:06:02,893 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 04:06:02,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 04:06:02,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 04:06:02,894 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 04:06:02,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 04:06:02,894 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 04:06:02,894 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 04:06:02,894 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 04:06:03,186 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 04:06:03,200 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 04:06:03,204 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 04:06:03,206 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 04:06:03,206 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 04:06:03,207 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/fermat2.c [2020-07-20 04:06:03,281 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d83bb86f5/dd0b3f69aead4720900fd388e418c713/FLAGb33a9c2b5 [2020-07-20 04:06:03,771 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 04:06:03,772 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/fermat2.c [2020-07-20 04:06:03,779 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d83bb86f5/dd0b3f69aead4720900fd388e418c713/FLAGb33a9c2b5 [2020-07-20 04:06:04,148 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d83bb86f5/dd0b3f69aead4720900fd388e418c713 [2020-07-20 04:06:04,156 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 04:06:04,159 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 04:06:04,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 04:06:04,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 04:06:04,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 04:06:04,166 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:06:04" (1/1) ... [2020-07-20 04:06:04,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3497f74d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:06:04, skipping insertion in model container [2020-07-20 04:06:04,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:06:04" (1/1) ... [2020-07-20 04:06:04,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 04:06:04,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 04:06:04,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 04:06:04,398 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 04:06:04,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 04:06:04,430 INFO L208 MainTranslator]: Completed translation [2020-07-20 04:06:04,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:06:04 WrapperNode [2020-07-20 04:06:04,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 04:06:04,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 04:06:04,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 04:06:04,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 04:06:04,441 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:06:04" (1/1) ... [2020-07-20 04:06:04,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:06:04" (1/1) ... [2020-07-20 04:06:04,539 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:06:04" (1/1) ... [2020-07-20 04:06:04,540 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:06:04" (1/1) ... [2020-07-20 04:06:04,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:06:04" (1/1) ... [2020-07-20 04:06:04,550 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:06:04" (1/1) ... [2020-07-20 04:06:04,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:06:04" (1/1) ... [2020-07-20 04:06:04,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 04:06:04,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 04:06:04,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 04:06:04,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 04:06:04,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:06:04" (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 04:06:04,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 04:06:04,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 04:06:04,625 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 04:06:04,625 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 04:06:04,625 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 04:06:04,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 04:06:04,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-07-20 04:06:04,625 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 04:06:04,626 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 04:06:04,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 04:06:04,626 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 04:06:04,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 04:06:04,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 04:06:04,846 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 04:06:04,847 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 04:06:04,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:06:04 BoogieIcfgContainer [2020-07-20 04:06:04,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 04:06:04,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 04:06:04,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 04:06:04,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 04:06:04,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:06:04" (1/3) ... [2020-07-20 04:06:04,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152e0826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:06:04, skipping insertion in model container [2020-07-20 04:06:04,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:06:04" (2/3) ... [2020-07-20 04:06:04,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152e0826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:06:04, skipping insertion in model container [2020-07-20 04:06:04,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:06:04" (3/3) ... [2020-07-20 04:06:04,886 INFO L109 eAbstractionObserver]: Analyzing ICFG fermat2.c [2020-07-20 04:06:04,899 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 04:06:04,907 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 04:06:04,933 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 04:06:04,958 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 04:06:04,959 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 04:06:04,959 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 04:06:04,959 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 04:06:04,959 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 04:06:04,959 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 04:06:04,959 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 04:06:04,960 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 04:06:04,977 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-07-20 04:06:04,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 04:06:04,984 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:06:04,985 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:06:04,985 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:06:04,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:06:04,991 INFO L82 PathProgramCache]: Analyzing trace with hash -849943384, now seen corresponding path program 1 times [2020-07-20 04:06:04,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:06:04,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472395909] [2020-07-20 04:06:04,999 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b85d0fe [2020-07-20 04:06:05,062 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 04:06:05,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803412265] [2020-07-20 04:06:05,063 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dece7d0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:06:05,202 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dece7d0 issued 2 check-sat command(s) [2020-07-20 04:06:05,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 04:06:05,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 04:06:05,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 04:06:05,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 04:06:05,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472395909] [2020-07-20 04:06:05,234 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 04:06:05,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803412265] [2020-07-20 04:06:05,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:06:05,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 04:06:05,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936202519] [2020-07-20 04:06:05,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 04:06:05,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:06:05,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 04:06:05,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 04:06:05,255 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-07-20 04:06:05,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:06:05,277 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2020-07-20 04:06:05,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 04:06:05,279 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-20 04:06:05,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:06:05,289 INFO L225 Difference]: With dead ends: 50 [2020-07-20 04:06:05,289 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 04:06:05,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 04:06:05,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 04:06:05,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-20 04:06:05,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 04:06:05,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-07-20 04:06:05,332 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 21 [2020-07-20 04:06:05,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:06:05,333 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-07-20 04:06:05,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 04:06:05,333 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-07-20 04:06:05,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 04:06:05,336 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:06:05,336 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:06:05,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-07-20 04:06:05,542 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:06:05,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:06:05,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1193991140, now seen corresponding path program 1 times [2020-07-20 04:06:05,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:06:05,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458702523] [2020-07-20 04:06:05,545 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b85d0fe [2020-07-20 04:06:05,553 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 04:06:05,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424763738] [2020-07-20 04:06:05,554 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5ae21d6 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:06:05,612 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5ae21d6 issued 4 check-sat command(s) [2020-07-20 04:06:05,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 04:06:05,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 04:06:05,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 04:06:05,713 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 04:06:18,342 WARN L193 SmtUtils]: Spent 8.34 s on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 04:06:18,346 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 04:06:36,357 WARN L193 SmtUtils]: Spent 11.10 s on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 04:06:38,411 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 04:06:46,604 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~u~0_BEFORE_CALL_1 Int)) (and (not (= (+ (* 2 v_main_~u~0_BEFORE_CALL_1) (* 4 (let ((.cse0 (div (+ (* v_main_~u~0_BEFORE_CALL_1 (- 1)) 1) (- 2)))) (* .cse0 .cse0)))) (+ (* v_main_~u~0_BEFORE_CALL_1 v_main_~u~0_BEFORE_CALL_1) 1))) (= 0 (mod (+ v_main_~u~0_BEFORE_CALL_1 1) (- 2))))) is different from false [2020-07-20 04:06:48,626 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~u~0_BEFORE_CALL_1 Int)) (and (not (= (+ (* 2 v_main_~u~0_BEFORE_CALL_1) (* 4 (let ((.cse0 (div (+ (* v_main_~u~0_BEFORE_CALL_1 (- 1)) 1) (- 2)))) (* .cse0 .cse0)))) (+ (* v_main_~u~0_BEFORE_CALL_1 v_main_~u~0_BEFORE_CALL_1) 1))) (= 0 (mod (+ v_main_~u~0_BEFORE_CALL_1 1) (- 2))))) is different from true [2020-07-20 04:06:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 04:06:48,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458702523] [2020-07-20 04:06:48,631 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 04:06:48,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424763738] [2020-07-20 04:06:48,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:06:48,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 04:06:48,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254741773] [2020-07-20 04:06:48,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 04:06:48,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:06:48,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 04:06:48,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=13, Unknown=2, NotChecked=6, Total=30 [2020-07-20 04:06:48,635 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 6 states. [2020-07-20 04:06:59,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:06:59,084 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-07-20 04:06:59,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 04:06:59,087 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-07-20 04:06:59,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:06:59,090 INFO L225 Difference]: With dead ends: 34 [2020-07-20 04:06:59,090 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 04:06:59,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=9, Invalid=13, Unknown=2, NotChecked=6, Total=30 [2020-07-20 04:06:59,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 04:06:59,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-07-20 04:06:59,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 04:06:59,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-20 04:06:59,101 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 21 [2020-07-20 04:06:59,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:06:59,103 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-20 04:06:59,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 04:06:59,103 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-20 04:06:59,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 04:06:59,104 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:06:59,104 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 04:06:59,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:06:59,312 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:06:59,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:06:59,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1415100442, now seen corresponding path program 1 times [2020-07-20 04:06:59,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:06:59,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949706083] [2020-07-20 04:06:59,316 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b85d0fe [2020-07-20 04:06:59,320 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 04:06:59,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912584207] [2020-07-20 04:06:59,321 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5386109 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:06:59,369 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5386109 issued 4 check-sat command(s) [2020-07-20 04:06:59,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 04:06:59,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 04:06:59,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 04:06:59,521 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 04:06:59,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 04:06:59,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949706083] [2020-07-20 04:06:59,798 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 04:06:59,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912584207] [2020-07-20 04:06:59,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 04:06:59,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 04:06:59,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806203275] [2020-07-20 04:06:59,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 04:06:59,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:06:59,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 04:06:59,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-20 04:06:59,801 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 8 states. [2020-07-20 04:07:07,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:07:07,398 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-07-20 04:07:07,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 04:07:07,403 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-07-20 04:07:07,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:07:07,406 INFO L225 Difference]: With dead ends: 35 [2020-07-20 04:07:07,406 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 04:07:07,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-20 04:07:07,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 04:07:07,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 04:07:07,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 04:07:07,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-07-20 04:07:07,422 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 27 [2020-07-20 04:07:07,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:07:07,423 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-07-20 04:07:07,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 04:07:07,423 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-07-20 04:07:07,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 04:07:07,425 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:07:07,425 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:07:07,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:07:07,635 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:07:07,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:07:07,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1831429119, now seen corresponding path program 1 times [2020-07-20 04:07:07,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:07:07,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115366567] [2020-07-20 04:07:07,637 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b85d0fe [2020-07-20 04:07:07,641 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 04:07:07,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755011074] [2020-07-20 04:07:07,641 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56643d7b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:07:07,683 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56643d7b issued 4 check-sat command(s) [2020-07-20 04:07:07,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 04:07:07,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 04:07:07,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 04:07:18,314 WARN L193 SmtUtils]: Spent 8.37 s on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 04:07:26,833 WARN L193 SmtUtils]: Spent 8.36 s on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 04:07:26,842 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 04:07:27,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 04:07:27,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115366567] [2020-07-20 04:07:27,037 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 04:07:27,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755011074] [2020-07-20 04:07:27,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 04:07:27,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 04:07:27,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94004119] [2020-07-20 04:07:27,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 04:07:27,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:07:27,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 04:07:27,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=54, Unknown=1, NotChecked=0, Total=72 [2020-07-20 04:07:27,040 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-07-20 04:07:40,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:07:40,760 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-07-20 04:07:40,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 04:07:40,772 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-20 04:07:40,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:07:40,773 INFO L225 Difference]: With dead ends: 40 [2020-07-20 04:07:40,773 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 04:07:40,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=28, Invalid=81, Unknown=1, NotChecked=0, Total=110 [2020-07-20 04:07:40,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 04:07:40,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-07-20 04:07:40,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 04:07:40,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-07-20 04:07:40,784 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 29 [2020-07-20 04:07:40,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:07:40,784 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-07-20 04:07:40,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 04:07:40,784 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-07-20 04:07:40,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 04:07:40,785 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:07:40,786 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:07:40,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:07:40,987 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:07:40,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:07:40,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1774170817, now seen corresponding path program 1 times [2020-07-20 04:07:40,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:07:40,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865682611] [2020-07-20 04:07:40,989 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b85d0fe [2020-07-20 04:07:40,994 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 04:07:40,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [83373355] [2020-07-20 04:07:40,995 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@32a7b60c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:07:41,045 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@32a7b60c issued 4 check-sat command(s) [2020-07-20 04:07:41,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 04:07:41,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 04:07:41,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 04:07:51,855 WARN L193 SmtUtils]: Spent 8.48 s on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 04:08:08,502 WARN L193 SmtUtils]: Spent 8.34 s on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 04:08:08,510 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 04:08:08,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 2 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 04:08:08,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865682611] [2020-07-20 04:08:08,743 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 04:08:08,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83373355] [2020-07-20 04:08:08,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 04:08:08,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 04:08:08,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180363010] [2020-07-20 04:08:08,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 04:08:08,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:08:08,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 04:08:08,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=50, Unknown=5, NotChecked=0, Total=72 [2020-07-20 04:08:08,745 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 9 states. [2020-07-20 04:08:36,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:08:36,827 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-07-20 04:08:36,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 04:08:36,828 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-20 04:08:36,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:08:36,829 INFO L225 Difference]: With dead ends: 46 [2020-07-20 04:08:36,829 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 04:08:36,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=28, Invalid=77, Unknown=5, NotChecked=0, Total=110 [2020-07-20 04:08:36,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 04:08:36,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2020-07-20 04:08:36,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 04:08:36,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-07-20 04:08:36,839 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 29 [2020-07-20 04:08:36,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:08:36,839 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-07-20 04:08:36,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 04:08:36,839 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-07-20 04:08:36,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 04:08:36,840 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:08:36,841 INFO L422 BasicCegarLoop]: trace histogram [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 04:08:37,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:08:37,051 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:08:37,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:08:37,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1286102758, now seen corresponding path program 2 times [2020-07-20 04:08:37,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:08:37,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160468872] [2020-07-20 04:08:37,053 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b85d0fe [2020-07-20 04:08:37,057 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 04:08:37,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [913650513] [2020-07-20 04:08:37,058 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d4c0a5c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:08:37,104 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d4c0a5c issued 4 check-sat command(s) [2020-07-20 04:08:37,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 04:08:37,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 04:08:37,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 04:08:39,838 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 04:08:41,997 WARN L838 $PredicateComparison]: unable to prove that (and (= (+ (* c_main_~u~0 c_main_~u~0) 5) (+ (* 2 c_main_~u~0) (* 4 c_main_~v~0) (* 4 c_main_~r~0) (* 4 c_main_~A~0))) (= 5 c_main_~v~0)) is different from false [2020-07-20 04:08:42,018 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 04:08:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 4 not checked. [2020-07-20 04:08:44,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160468872] [2020-07-20 04:08:44,412 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 04:08:44,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913650513] [2020-07-20 04:08:44,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 04:08:44,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-20 04:08:44,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917271465] [2020-07-20 04:08:44,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 04:08:44,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:08:44,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 04:08:44,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=54, Unknown=3, NotChecked=14, Total=90 [2020-07-20 04:08:44,414 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 10 states. [2020-07-20 04:08:51,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:08:51,455 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2020-07-20 04:08:51,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 04:08:51,457 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-07-20 04:08:51,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:08:51,459 INFO L225 Difference]: With dead ends: 58 [2020-07-20 04:08:51,459 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 04:08:51,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=30, Invalid=81, Unknown=3, NotChecked=18, Total=132 [2020-07-20 04:08:51,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 04:08:51,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-07-20 04:08:51,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 04:08:51,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2020-07-20 04:08:51,471 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 37 [2020-07-20 04:08:51,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:08:51,472 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2020-07-20 04:08:51,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 04:08:51,472 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2020-07-20 04:08:51,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 04:08:51,473 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:08:51,474 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:08:51,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:08:51,676 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:08:51,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:08:51,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1343361060, now seen corresponding path program 1 times [2020-07-20 04:08:51,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:08:51,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020118591] [2020-07-20 04:08:51,678 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b85d0fe [2020-07-20 04:08:51,682 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 04:08:51,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326989308] [2020-07-20 04:08:51,683 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@757b1faa No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:08:51,714 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@757b1faa issued 2 check-sat command(s) [2020-07-20 04:08:51,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 04:08:51,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 04:08:51,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 04:08:51,745 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-20 04:08:51,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020118591] [2020-07-20 04:08:51,746 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 04:08:51,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326989308] [2020-07-20 04:08:51,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 04:08:51,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-07-20 04:08:51,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373693642] [2020-07-20 04:08:51,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 04:08:51,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:08:51,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 04:08:51,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 04:08:51,748 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 5 states. [2020-07-20 04:08:51,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:08:51,821 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-07-20 04:08:51,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 04:08:51,830 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-07-20 04:08:51,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:08:51,832 INFO L225 Difference]: With dead ends: 66 [2020-07-20 04:08:51,832 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 04:08:51,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 04:08:51,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 04:08:51,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-07-20 04:08:51,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 04:08:51,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-07-20 04:08:51,844 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 37 [2020-07-20 04:08:51,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:08:51,845 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-07-20 04:08:51,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 04:08:51,845 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-07-20 04:08:51,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 04:08:51,846 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:08:51,846 INFO L422 BasicCegarLoop]: trace histogram [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 04:08:52,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:08:52,062 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:08:52,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:08:52,062 INFO L82 PathProgramCache]: Analyzing trace with hash 332243810, now seen corresponding path program 2 times [2020-07-20 04:08:52,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:08:52,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166365808] [2020-07-20 04:08:52,063 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b85d0fe [2020-07-20 04:08:52,067 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 04:08:52,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044518319] [2020-07-20 04:08:52,067 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5e0972f2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:08:52,116 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5e0972f2 issued 4 check-sat command(s) [2020-07-20 04:08:52,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 04:08:52,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 04:08:52,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 04:08:56,580 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 04:09:05,042 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 04:09:05,046 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 04:09:11,449 WARN L838 $PredicateComparison]: unable to prove that (or (<= 1 |c___VERIFIER_assert_#in~cond|) (and (<= 0 |c___VERIFIER_assert_#in~cond|) (exists ((v_main_~u~0_BEFORE_CALL_11 Int)) (and (not (= (+ (* 10 v_main_~u~0_BEFORE_CALL_11) (* 4 (let ((.cse0 (div (+ (* v_main_~u~0_BEFORE_CALL_11 (- 1)) 5) (- 2)))) (* .cse0 .cse0)))) (+ (* v_main_~u~0_BEFORE_CALL_11 v_main_~u~0_BEFORE_CALL_11) 25))) (= 0 (mod (+ v_main_~u~0_BEFORE_CALL_11 1) (- 2))))))) is different from false [2020-07-20 04:09:11,453 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 04:09:35,966 WARN L193 SmtUtils]: Spent 12.62 s on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 04:09:37,997 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 04:09:46,296 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~u~0_BEFORE_CALL_11 Int)) (and (not (= (+ (* 10 v_main_~u~0_BEFORE_CALL_11) (* 4 (let ((.cse0 (div (+ (* v_main_~u~0_BEFORE_CALL_11 (- 1)) 5) (- 2)))) (* .cse0 .cse0)))) (+ (* v_main_~u~0_BEFORE_CALL_11 v_main_~u~0_BEFORE_CALL_11) 25))) (= 0 (mod (+ v_main_~u~0_BEFORE_CALL_11 1) (- 2))))) is different from false [2020-07-20 04:09:48,333 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~u~0_BEFORE_CALL_11 Int)) (and (not (= (+ (* 10 v_main_~u~0_BEFORE_CALL_11) (* 4 (let ((.cse0 (div (+ (* v_main_~u~0_BEFORE_CALL_11 (- 1)) 5) (- 2)))) (* .cse0 .cse0)))) (+ (* v_main_~u~0_BEFORE_CALL_11 v_main_~u~0_BEFORE_CALL_11) 25))) (= 0 (mod (+ v_main_~u~0_BEFORE_CALL_11 1) (- 2))))) is different from true [2020-07-20 04:09:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 8 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-20 04:09:48,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166365808] [2020-07-20 04:09:48,338 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 04:09:48,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044518319] [2020-07-20 04:09:48,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 04:09:48,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-20 04:09:48,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5792844] [2020-07-20 04:09:48,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 04:09:48,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:09:48,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 04:09:48,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=14, Unknown=11, NotChecked=18, Total=56 [2020-07-20 04:09:48,340 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 8 states. [2020-07-20 04:10:48,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:10:48,841 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2020-07-20 04:10:48,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 04:10:48,860 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-07-20 04:10:48,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:10:48,862 INFO L225 Difference]: With dead ends: 68 [2020-07-20 04:10:48,862 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 04:10:48,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.4s TimeCoverageRelationStatistics Valid=13, Invalid=14, Unknown=11, NotChecked=18, Total=56 [2020-07-20 04:10:48,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 04:10:48,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-07-20 04:10:48,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 04:10:48,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2020-07-20 04:10:48,874 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 37 [2020-07-20 04:10:48,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:10:48,874 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2020-07-20 04:10:48,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 04:10:48,874 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2020-07-20 04:10:48,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 04:10:48,876 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:10:48,876 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:10:49,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-07-20 04:10:49,091 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:10:49,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:10:49,091 INFO L82 PathProgramCache]: Analyzing trace with hash 584019147, now seen corresponding path program 3 times [2020-07-20 04:10:49,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:10:49,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483000351] [2020-07-20 04:10:49,092 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b85d0fe [2020-07-20 04:10:49,095 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 04:10:49,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256457267] [2020-07-20 04:10:49,095 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@321ae9d1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:10:49,143 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@321ae9d1 issued 4 check-sat command(s) [2020-07-20 04:10:49,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 04:10:49,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 04:10:49,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 04:10:49,323 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 04:10:49,737 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 04:10:50,096 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 04:10:50,639 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 04:10:50,642 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 04:11:16,152 WARN L193 SmtUtils]: Spent 12.80 s on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 04:11:16,154 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 04:11:24,447 WARN L838 $PredicateComparison]: unable to prove that (or (and (exists ((v_main_~u~0_BEFORE_CALL_15 Int)) (and (not (= (+ (* v_main_~u~0_BEFORE_CALL_15 v_main_~u~0_BEFORE_CALL_15) 1) (+ (* 4 (let ((.cse0 (div (+ (* v_main_~u~0_BEFORE_CALL_15 (- 1)) 1) (- 2)))) (* .cse0 .cse0))) (* 2 v_main_~u~0_BEFORE_CALL_15)))) (= 0 (mod (+ v_main_~u~0_BEFORE_CALL_15 1) (- 2))))) (<= 0 c___VERIFIER_assert_~cond)) (<= 1 c___VERIFIER_assert_~cond)) is different from false [2020-07-20 04:11:26,481 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 04:11:34,704 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~u~0_BEFORE_CALL_15 Int)) (and (not (= (+ (* v_main_~u~0_BEFORE_CALL_15 v_main_~u~0_BEFORE_CALL_15) 1) (+ (* 4 (let ((.cse0 (div (+ (* v_main_~u~0_BEFORE_CALL_15 (- 1)) 1) (- 2)))) (* .cse0 .cse0))) (* 2 v_main_~u~0_BEFORE_CALL_15)))) (= 0 (mod (+ v_main_~u~0_BEFORE_CALL_15 1) (- 2))))) is different from false [2020-07-20 04:11:36,744 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~u~0_BEFORE_CALL_15 Int)) (and (not (= (+ (* v_main_~u~0_BEFORE_CALL_15 v_main_~u~0_BEFORE_CALL_15) 1) (+ (* 4 (let ((.cse0 (div (+ (* v_main_~u~0_BEFORE_CALL_15 (- 1)) 1) (- 2)))) (* .cse0 .cse0))) (* 2 v_main_~u~0_BEFORE_CALL_15)))) (= 0 (mod (+ v_main_~u~0_BEFORE_CALL_15 1) (- 2))))) is different from true [2020-07-20 04:11:36,750 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 04:11:36,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483000351] [2020-07-20 04:11:36,750 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 04:11:36,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256457267] [2020-07-20 04:11:36,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 04:11:36,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 04:11:36,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734121428] [2020-07-20 04:11:36,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 04:11:36,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:11:36,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 04:11:36,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=31, Unknown=4, NotChecked=22, Total=72 [2020-07-20 04:11:36,753 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 9 states. [2020-07-20 04:12:15,079 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (exists ((v_main_~u~0_BEFORE_CALL_15 Int)) (and (not (= (+ (* v_main_~u~0_BEFORE_CALL_15 v_main_~u~0_BEFORE_CALL_15) 1) (+ (* 4 (let ((.cse1 (div (+ (* v_main_~u~0_BEFORE_CALL_15 (- 1)) 1) (- 2)))) (* .cse1 .cse1))) (* 2 v_main_~u~0_BEFORE_CALL_15)))) (= 0 (mod (+ v_main_~u~0_BEFORE_CALL_15 1) (- 2))))))) (and (or (and .cse0 (<= 0 c___VERIFIER_assert_~cond)) (<= 1 c___VERIFIER_assert_~cond)) (or (and .cse0 (<= 0 |c___VERIFIER_assert_#in~cond|)) (<= 1 |c___VERIFIER_assert_#in~cond|)))) is different from false [2020-07-20 04:12:19,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:12:19,735 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2020-07-20 04:12:19,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 04:12:19,801 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-07-20 04:12:19,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:12:19,803 INFO L225 Difference]: With dead ends: 78 [2020-07-20 04:12:19,803 INFO L226 Difference]: Without dead ends: 76 [2020-07-20 04:12:19,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=17, Invalid=32, Unknown=5, NotChecked=36, Total=90 [2020-07-20 04:12:19,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-20 04:12:19,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-07-20 04:12:19,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-20 04:12:19,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2020-07-20 04:12:19,827 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 45 [2020-07-20 04:12:19,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:12:19,827 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2020-07-20 04:12:19,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 04:12:19,827 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2020-07-20 04:12:19,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 04:12:19,829 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:12:19,829 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:12:20,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:12:20,033 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:12:20,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:12:20,034 INFO L82 PathProgramCache]: Analyzing trace with hash 641277449, now seen corresponding path program 2 times [2020-07-20 04:12:20,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:12:20,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877458284] [2020-07-20 04:12:20,036 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b85d0fe [2020-07-20 04:12:20,039 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 04:12:20,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018736227] [2020-07-20 04:12:20,039 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f9d066d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:12:20,094 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f9d066d issued 4 check-sat command(s) [2020-07-20 04:12:20,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 04:12:20,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 04:12:20,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 04:12:20,744 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 04:12:21,272 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 04:12:25,944 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 04:12:25,948 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 04:12:32,344 WARN L838 $PredicateComparison]: unable to prove that (or (and (exists ((v_main_~u~0_BEFORE_CALL_19 Int)) (and (not (= (+ (* v_main_~u~0_BEFORE_CALL_19 v_main_~u~0_BEFORE_CALL_19) 9) (+ (* 4 (let ((.cse0 (div (+ (* v_main_~u~0_BEFORE_CALL_19 (- 1)) 3) (- 2)))) (* .cse0 .cse0))) (* 6 v_main_~u~0_BEFORE_CALL_19)))) (= 0 (mod (+ v_main_~u~0_BEFORE_CALL_19 1) (- 2))))) (<= 0 |c___VERIFIER_assert_#in~cond|)) (<= 1 |c___VERIFIER_assert_#in~cond|)) is different from false [2020-07-20 04:12:32,348 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 04:12:40,642 WARN L838 $PredicateComparison]: unable to prove that (or (and (exists ((v_main_~u~0_BEFORE_CALL_19 Int)) (and (not (= (+ (* v_main_~u~0_BEFORE_CALL_19 v_main_~u~0_BEFORE_CALL_19) 9) (+ (* 4 (let ((.cse0 (div (+ (* v_main_~u~0_BEFORE_CALL_19 (- 1)) 3) (- 2)))) (* .cse0 .cse0))) (* 6 v_main_~u~0_BEFORE_CALL_19)))) (= 0 (mod (+ v_main_~u~0_BEFORE_CALL_19 1) (- 2))))) (<= 0 c___VERIFIER_assert_~cond)) (<= 1 c___VERIFIER_assert_~cond)) is different from false [2020-07-20 04:12:42,696 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 04:12:51,012 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~u~0_BEFORE_CALL_19 Int)) (and (not (= (+ (* v_main_~u~0_BEFORE_CALL_19 v_main_~u~0_BEFORE_CALL_19) 9) (+ (* 4 (let ((.cse0 (div (+ (* v_main_~u~0_BEFORE_CALL_19 (- 1)) 3) (- 2)))) (* .cse0 .cse0))) (* 6 v_main_~u~0_BEFORE_CALL_19)))) (= 0 (mod (+ v_main_~u~0_BEFORE_CALL_19 1) (- 2))))) is different from false [2020-07-20 04:12:53,050 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~u~0_BEFORE_CALL_19 Int)) (and (not (= (+ (* v_main_~u~0_BEFORE_CALL_19 v_main_~u~0_BEFORE_CALL_19) 9) (+ (* 4 (let ((.cse0 (div (+ (* v_main_~u~0_BEFORE_CALL_19 (- 1)) 3) (- 2)))) (* .cse0 .cse0))) (* 6 v_main_~u~0_BEFORE_CALL_19)))) (= 0 (mod (+ v_main_~u~0_BEFORE_CALL_19 1) (- 2))))) is different from true [2020-07-20 04:12:53,055 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 16 refuted. 2 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 04:12:53,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877458284] [2020-07-20 04:12:53,056 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 04:12:53,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018736227] [2020-07-20 04:12:53,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 04:12:53,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 04:12:53,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761051896] [2020-07-20 04:12:53,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 04:12:53,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:12:53,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 04:12:53,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=21, Unknown=6, NotChecked=30, Total=72 [2020-07-20 04:12:53,057 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand 9 states. [2020-07-20 04:13:27,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:13:27,819 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2020-07-20 04:13:27,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 04:13:27,913 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-07-20 04:13:27,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:13:27,915 INFO L225 Difference]: With dead ends: 82 [2020-07-20 04:13:27,915 INFO L226 Difference]: Without dead ends: 80 [2020-07-20 04:13:27,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=15, Invalid=21, Unknown=6, NotChecked=30, Total=72 [2020-07-20 04:13:27,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-20 04:13:27,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-07-20 04:13:27,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-20 04:13:27,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2020-07-20 04:13:27,929 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 45 [2020-07-20 04:13:27,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:13:27,929 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2020-07-20 04:13:27,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 04:13:27,930 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2020-07-20 04:13:27,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 04:13:27,931 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:13:27,931 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:13:28,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:13:28,133 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:13:28,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:13:28,133 INFO L82 PathProgramCache]: Analyzing trace with hash -150985083, now seen corresponding path program 3 times [2020-07-20 04:13:28,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:13:28,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321403551] [2020-07-20 04:13:28,134 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b85d0fe [2020-07-20 04:13:28,137 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 04:13:28,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587446123] [2020-07-20 04:13:28,138 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2223bb13 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:13:28,207 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2223bb13 issued 4 check-sat command(s) [2020-07-20 04:13:28,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 04:13:28,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 04:13:28,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 04:13:28,408 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 04:13:32,860 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 04:13:48,110 WARN L193 SmtUtils]: Spent 8.55 s on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 04:14:09,473 WARN L193 SmtUtils]: Spent 8.76 s on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 04:14:33,475 WARN L193 SmtUtils]: Spent 6.78 s on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 04:14:33,481 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 04:14:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 18 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 04:14:35,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321403551] [2020-07-20 04:14:35,627 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 04:14:35,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587446123] [2020-07-20 04:14:35,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 04:14:35,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-20 04:14:35,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536081778] [2020-07-20 04:14:35,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 04:14:35,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:14:35,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 04:14:35,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=70, Unknown=19, NotChecked=0, Total=110 [2020-07-20 04:14:35,629 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand 11 states. [2020-07-20 04:16:41,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:16:41,419 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2020-07-20 04:16:41,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 04:16:41,427 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-07-20 04:16:41,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:16:41,429 INFO L225 Difference]: With dead ends: 86 [2020-07-20 04:16:41,429 INFO L226 Difference]: Without dead ends: 84 [2020-07-20 04:16:41,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 67.6s TimeCoverageRelationStatistics Valid=32, Invalid=105, Unknown=19, NotChecked=0, Total=156 [2020-07-20 04:16:41,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-20 04:16:41,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2020-07-20 04:16:41,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-20 04:16:41,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2020-07-20 04:16:41,448 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 45 [2020-07-20 04:16:41,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:16:41,449 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2020-07-20 04:16:41,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 04:16:41,449 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2020-07-20 04:16:41,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 04:16:41,450 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:16:41,451 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:16:41,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-07-20 04:16:41,669 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:16:41,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:16:41,670 INFO L82 PathProgramCache]: Analyzing trace with hash -53426768, now seen corresponding path program 4 times [2020-07-20 04:16:41,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:16:41,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649606802] [2020-07-20 04:16:41,671 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b85d0fe [2020-07-20 04:16:41,674 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 04:16:41,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278667367] [2020-07-20 04:16:41,675 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@43e76b0b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:16:41,738 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@43e76b0b issued 4 check-sat command(s) [2020-07-20 04:16:41,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 04:16:41,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 04:16:41,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 04:16:41,958 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 04:16:42,547 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 04:16:43,239 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 04:16:44,091 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 04:16:45,108 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 04:16:45,111 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 04:17:14,556 WARN L193 SmtUtils]: Spent 14.47 s on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 04:17:14,558 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 04:17:47,853 WARN L193 SmtUtils]: Spent 14.26 s on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 04:17:49,991 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 04:17:58,291 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~u~0_BEFORE_CALL_28 Int)) (and (not (= (+ (* 2 v_main_~u~0_BEFORE_CALL_28) (* 4 (let ((.cse0 (div (+ (* v_main_~u~0_BEFORE_CALL_28 (- 1)) 1) (- 2)))) (* .cse0 .cse0)))) (+ (* v_main_~u~0_BEFORE_CALL_28 v_main_~u~0_BEFORE_CALL_28) 1))) (= 0 (mod (+ v_main_~u~0_BEFORE_CALL_28 1) (- 2))))) is different from false [2020-07-20 04:18:00,335 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~u~0_BEFORE_CALL_28 Int)) (and (not (= (+ (* 2 v_main_~u~0_BEFORE_CALL_28) (* 4 (let ((.cse0 (div (+ (* v_main_~u~0_BEFORE_CALL_28 (- 1)) 1) (- 2)))) (* .cse0 .cse0)))) (+ (* v_main_~u~0_BEFORE_CALL_28 v_main_~u~0_BEFORE_CALL_28) 1))) (= 0 (mod (+ v_main_~u~0_BEFORE_CALL_28 1) (- 2))))) is different from true [2020-07-20 04:18:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-20 04:18:00,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649606802] [2020-07-20 04:18:00,342 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 04:18:00,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278667367] [2020-07-20 04:18:00,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 04:18:00,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 04:18:00,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711479029] [2020-07-20 04:18:00,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 04:18:00,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:18:00,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 04:18:00,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=49, Unknown=10, NotChecked=14, Total=90 [2020-07-20 04:18:00,344 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand 10 states. [2020-07-20 04:19:30,272 WARN L193 SmtUtils]: Spent 43.43 s on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 04:19:49,332 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (exists ((v_main_~u~0_BEFORE_CALL_28 Int)) (and (not (= (+ (* 2 v_main_~u~0_BEFORE_CALL_28) (* 4 (let ((.cse1 (div (+ (* v_main_~u~0_BEFORE_CALL_28 (- 1)) 1) (- 2)))) (* .cse1 .cse1)))) (+ (* v_main_~u~0_BEFORE_CALL_28 v_main_~u~0_BEFORE_CALL_28) 1))) (= 0 (mod (+ v_main_~u~0_BEFORE_CALL_28 1) (- 2))))))) (and (or (and .cse0 (<= 0 |c___VERIFIER_assert_#in~cond|)) (<= 1 |c___VERIFIER_assert_#in~cond|)) .cse0)) is different from false [2020-07-20 04:19:54,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:19:54,241 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2020-07-20 04:19:54,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 04:19:54,265 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-07-20 04:19:54,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:19:54,267 INFO L225 Difference]: With dead ends: 96 [2020-07-20 04:19:54,267 INFO L226 Difference]: Without dead ends: 94 [2020-07-20 04:19:54,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 114.2s TimeCoverageRelationStatistics Valid=23, Invalid=61, Unknown=14, NotChecked=34, Total=132 [2020-07-20 04:19:54,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-20 04:19:54,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2020-07-20 04:19:54,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-07-20 04:19:54,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2020-07-20 04:19:54,279 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 53 [2020-07-20 04:19:54,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:19:54,279 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2020-07-20 04:19:54,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 04:19:54,279 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2020-07-20 04:19:54,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 04:19:54,281 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:19:54,281 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:19:54,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:19:54,482 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:19:54,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:19:54,482 INFO L82 PathProgramCache]: Analyzing trace with hash 3831534, now seen corresponding path program 3 times [2020-07-20 04:19:54,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:19:54,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881111578] [2020-07-20 04:19:54,484 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b85d0fe [2020-07-20 04:19:54,487 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 04:19:54,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [177141767] [2020-07-20 04:19:54,487 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@32b15ff5 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:19:54,572 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@32b15ff5 issued 4 check-sat command(s) [2020-07-20 04:19:54,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 04:19:54,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-20 04:19:54,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 04:19:57,233 WARN L193 SmtUtils]: Spent 2.55 s on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 04:20:00,993 WARN L193 SmtUtils]: Spent 3.23 s on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 04:20:04,388 WARN L193 SmtUtils]: Spent 2.54 s on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 04:20:08,666 WARN L193 SmtUtils]: Spent 3.19 s on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 04:20:15,656 WARN L193 SmtUtils]: Spent 5.51 s on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-07-20 04:20:27,101 WARN L193 SmtUtils]: Spent 3.38 s on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 04:20:27,109 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 04:20:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 12 proven. 38 refuted. 2 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 04:20:28,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881111578] [2020-07-20 04:20:28,871 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 04:20:28,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177141767] [2020-07-20 04:20:28,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 04:20:28,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-20 04:20:28,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655474168] [2020-07-20 04:20:28,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 04:20:28,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:20:28,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 04:20:28,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=127, Unknown=3, NotChecked=0, Total=156 [2020-07-20 04:20:28,873 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand 13 states.