/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 BIGGEST_EQUIVALENCE_CLASS --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 06:13:07,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 06:13:07,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 06:13:07,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 06:13:07,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 06:13:07,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 06:13:07,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 06:13:07,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 06:13:07,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 06:13:07,833 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 06:13:07,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 06:13:07,837 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 06:13:07,837 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 06:13:07,840 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 06:13:07,843 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 06:13:07,844 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 06:13:07,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 06:13:07,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 06:13:07,848 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 06:13:07,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 06:13:07,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 06:13:07,867 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 06:13:07,868 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 06:13:07,869 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 06:13:07,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 06:13:07,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 06:13:07,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 06:13:07,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 06:13:07,887 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 06:13:07,927 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 06:13:07,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 06:13:07,932 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 06:13:07,933 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 06:13:07,933 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 06:13:07,933 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 06:13:07,933 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 06:13:07,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 06:13:07,934 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 06:13:07,934 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 06:13:07,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 06:13:07,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 06:13:07,937 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 06:13:07,937 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 06:13:07,937 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 06:13:07,938 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 06:13:07,938 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 06:13:07,938 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 06:13:07,938 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 06:13:07,939 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 06:13:07,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 06:13:07,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:13:07,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 06:13:07,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 06:13:07,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 06:13:07,942 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 06:13:07,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 06:13:07,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 06:13:07,943 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 06:13:07,943 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 06:13:08,277 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 06:13:08,291 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 06:13:08,295 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 06:13:08,297 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 06:13:08,297 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 06:13:08,298 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/fermat2.c [2020-07-20 06:13:08,380 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fbecf4ba/be123cbba6304102a84cfc23b7c647a3/FLAG6500404dd [2020-07-20 06:13:08,909 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 06:13:08,910 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/fermat2.c [2020-07-20 06:13:08,917 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fbecf4ba/be123cbba6304102a84cfc23b7c647a3/FLAG6500404dd [2020-07-20 06:13:09,254 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fbecf4ba/be123cbba6304102a84cfc23b7c647a3 [2020-07-20 06:13:09,265 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 06:13:09,268 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 06:13:09,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 06:13:09,270 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 06:13:09,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 06:13:09,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:13:09" (1/1) ... [2020-07-20 06:13:09,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e3904fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:09, skipping insertion in model container [2020-07-20 06:13:09,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:13:09" (1/1) ... [2020-07-20 06:13:09,288 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 06:13:09,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 06:13:09,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:13:09,536 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 06:13:09,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:13:09,574 INFO L208 MainTranslator]: Completed translation [2020-07-20 06:13:09,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:09 WrapperNode [2020-07-20 06:13:09,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 06:13:09,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 06:13:09,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 06:13:09,576 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 06:13:09,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:09" (1/1) ... [2020-07-20 06:13:09,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:09" (1/1) ... [2020-07-20 06:13:09,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:09" (1/1) ... [2020-07-20 06:13:09,688 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:09" (1/1) ... [2020-07-20 06:13:09,693 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:09" (1/1) ... [2020-07-20 06:13:09,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:09" (1/1) ... [2020-07-20 06:13:09,705 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:09" (1/1) ... [2020-07-20 06:13:09,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 06:13:09,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 06:13:09,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 06:13:09,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 06:13:09,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:09" (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 06:13:09,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 06:13:09,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 06:13:09,773 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 06:13:09,773 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 06:13:09,773 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 06:13:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 06:13:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-07-20 06:13:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 06:13:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 06:13:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 06:13:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 06:13:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 06:13:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 06:13:10,020 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 06:13:10,021 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 06:13:10,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:13:10 BoogieIcfgContainer [2020-07-20 06:13:10,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 06:13:10,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 06:13:10,031 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 06:13:10,035 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 06:13:10,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:13:09" (1/3) ... [2020-07-20 06:13:10,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e1daa45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:13:10, skipping insertion in model container [2020-07-20 06:13:10,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:09" (2/3) ... [2020-07-20 06:13:10,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e1daa45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:13:10, skipping insertion in model container [2020-07-20 06:13:10,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:13:10" (3/3) ... [2020-07-20 06:13:10,039 INFO L109 eAbstractionObserver]: Analyzing ICFG fermat2.c [2020-07-20 06:13:10,053 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 06:13:10,065 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 06:13:10,083 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 06:13:10,117 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 06:13:10,118 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 06:13:10,118 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 06:13:10,118 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 06:13:10,119 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 06:13:10,119 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 06:13:10,119 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 06:13:10,119 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 06:13:10,146 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-07-20 06:13:10,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 06:13:10,154 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:13:10,155 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 06:13:10,156 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:13:10,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:13:10,163 INFO L82 PathProgramCache]: Analyzing trace with hash -849943384, now seen corresponding path program 1 times [2020-07-20 06:13:10,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:13:10,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645219356] [2020-07-20 06:13:10,174 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@211968dd [2020-07-20 06:13:10,273 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:13:10,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360887848] [2020-07-20 06:13:10,274 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@627bff50 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 06:13:10,442 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@627bff50 issued 2 check-sat command(s) [2020-07-20 06:13:10,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:13:10,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 06:13:10,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:13:10,474 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 06:13:10,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645219356] [2020-07-20 06:13:10,475 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:13:10,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360887848] [2020-07-20 06:13:10,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:13:10,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 06:13:10,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310408476] [2020-07-20 06:13:10,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 06:13:10,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:13:10,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 06:13:10,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 06:13:10,502 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-07-20 06:13:10,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:13:10,532 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2020-07-20 06:13:10,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 06:13:10,534 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-20 06:13:10,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:13:10,545 INFO L225 Difference]: With dead ends: 50 [2020-07-20 06:13:10,545 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 06:13:10,549 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 06:13:10,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 06:13:10,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-20 06:13:10,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 06:13:10,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-07-20 06:13:10,601 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 21 [2020-07-20 06:13:10,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:13:10,602 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-07-20 06:13:10,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 06:13:10,602 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-07-20 06:13:10,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 06:13:10,605 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:13:10,605 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 06:13:10,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-07-20 06:13:10,810 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:13:10,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:13:10,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1193991140, now seen corresponding path program 1 times [2020-07-20 06:13:10,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:13:10,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350563044] [2020-07-20 06:13:10,816 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@211968dd [2020-07-20 06:13:10,827 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:13:10,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946964264] [2020-07-20 06:13:10,828 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@699b9f78 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:13:10,929 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@699b9f78 issued 4 check-sat command(s) [2020-07-20 06:13:10,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:13:10,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 06:13:10,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:13:11,066 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:13:23,775 WARN L193 SmtUtils]: Spent 8.58 s on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 06:13:23,780 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:13:43,792 WARN L193 SmtUtils]: Spent 12.34 s on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 06:13:45,834 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:13:54,030 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 06:13:56,052 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 06:13:56,056 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 06:13:56,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350563044] [2020-07-20 06:13:56,057 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:13:56,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946964264] [2020-07-20 06:13:56,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:13:56,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 06:13:56,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211993502] [2020-07-20 06:13:56,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 06:13:56,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:13:56,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 06:13:56,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=13, Unknown=2, NotChecked=6, Total=30 [2020-07-20 06:13:56,061 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 6 states. [2020-07-20 06:14:33,454 WARN L193 SmtUtils]: Spent 34.59 s on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 06:14:42,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:14:42,925 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-07-20 06:14:42,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 06:14:42,954 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-07-20 06:14:42,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:14:42,957 INFO L225 Difference]: With dead ends: 31 [2020-07-20 06:14:42,957 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 06:14:42,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.0s TimeCoverageRelationStatistics Valid=13, Invalid=19, Unknown=2, NotChecked=8, Total=42 [2020-07-20 06:14:42,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 06:14:42,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-20 06:14:42,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 06:14:42,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-20 06:14:42,969 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 21 [2020-07-20 06:14:42,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:14:42,971 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-20 06:14:42,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 06:14:42,971 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-20 06:14:42,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 06:14:42,972 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:14:42,972 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 06:14:43,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:14:43,174 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:14:43,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:14:43,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1415100442, now seen corresponding path program 1 times [2020-07-20 06:14:43,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:14:43,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184491185] [2020-07-20 06:14:43,181 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@211968dd [2020-07-20 06:14:43,189 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:14:43,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799537648] [2020-07-20 06:14:43,190 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@21704772 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:14:43,248 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@21704772 issued 4 check-sat command(s) [2020-07-20 06:14:43,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:14:43,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 06:14:43,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:14:43,482 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:14:43,695 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 06:14:43,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184491185] [2020-07-20 06:14:43,697 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:14:43,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799537648] [2020-07-20 06:14:43,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:14:43,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 06:14:43,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599073184] [2020-07-20 06:14:43,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 06:14:43,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:14:43,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 06:14:43,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-20 06:14:43,699 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 8 states. [2020-07-20 06:14:50,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:14:50,874 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-07-20 06:14:50,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 06:14:50,875 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-07-20 06:14:50,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:14:50,877 INFO L225 Difference]: With dead ends: 35 [2020-07-20 06:14:50,877 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 06:14:50,878 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 06:14:50,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 06:14:50,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 06:14:50,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 06:14:50,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-07-20 06:14:50,886 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 27 [2020-07-20 06:14:50,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:14:50,887 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-07-20 06:14:50,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 06:14:50,887 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-07-20 06:14:50,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 06:14:50,888 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:14:50,888 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 06:14:51,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:14:51,089 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:14:51,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:14:51,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1831429119, now seen corresponding path program 1 times [2020-07-20 06:14:51,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:14:51,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640567590] [2020-07-20 06:14:51,091 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@211968dd [2020-07-20 06:14:51,094 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:14:51,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022137715] [2020-07-20 06:14:51,095 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4043230d 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 06:14:51,154 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4043230d issued 4 check-sat command(s) [2020-07-20 06:14:51,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:14:51,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 06:14:51,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:15:01,929 WARN L193 SmtUtils]: Spent 8.42 s on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 06:15:10,682 WARN L193 SmtUtils]: Spent 8.54 s on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 06:15:10,692 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 06:15:10,929 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 06:15:10,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640567590] [2020-07-20 06:15:10,930 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:15:10,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022137715] [2020-07-20 06:15:10,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:15:10,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 06:15:10,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120661520] [2020-07-20 06:15:10,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 06:15:10,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:15:10,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 06:15:10,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=54, Unknown=1, NotChecked=0, Total=72 [2020-07-20 06:15:10,939 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-07-20 06:15:24,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:15:24,574 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-07-20 06:15:24,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 06:15:24,584 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-20 06:15:24,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:15:24,586 INFO L225 Difference]: With dead ends: 40 [2020-07-20 06:15:24,586 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 06:15:24,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=28, Invalid=81, Unknown=1, NotChecked=0, Total=110 [2020-07-20 06:15:24,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 06:15:24,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-07-20 06:15:24,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 06:15:24,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-07-20 06:15:24,597 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 29 [2020-07-20 06:15:24,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:15:24,597 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-07-20 06:15:24,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 06:15:24,598 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-07-20 06:15:24,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 06:15:24,599 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:15:24,599 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 06:15:24,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:15:24,808 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:15:24,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:15:24,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1774170817, now seen corresponding path program 1 times [2020-07-20 06:15:24,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:15:24,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709395232] [2020-07-20 06:15:24,812 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@211968dd [2020-07-20 06:15:24,817 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:15:24,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1163221391] [2020-07-20 06:15:24,818 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e390b31 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:15:24,871 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e390b31 issued 4 check-sat command(s) [2020-07-20 06:15:24,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:15:24,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 06:15:24,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:15:35,497 WARN L193 SmtUtils]: Spent 8.25 s on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 06:15:52,268 WARN L193 SmtUtils]: Spent 8.43 s on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 06:15:52,275 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 06:15:52,559 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 06:15:52,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709395232] [2020-07-20 06:15:52,560 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:15:52,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163221391] [2020-07-20 06:15:52,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:15:52,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 06:15:52,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428374038] [2020-07-20 06:15:52,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 06:15:52,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:15:52,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 06:15:52,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=50, Unknown=5, NotChecked=0, Total=72 [2020-07-20 06:15:52,562 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 9 states. [2020-07-20 06:16:20,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:16:20,857 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-07-20 06:16:20,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 06:16:20,858 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-20 06:16:20,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:16:20,859 INFO L225 Difference]: With dead ends: 46 [2020-07-20 06:16:20,860 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 06:16:20,860 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 06:16:20,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 06:16:20,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2020-07-20 06:16:20,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 06:16:20,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-07-20 06:16:20,870 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 29 [2020-07-20 06:16:20,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:16:20,870 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-07-20 06:16:20,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 06:16:20,871 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-07-20 06:16:20,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 06:16:20,872 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:16:20,872 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 06:16:21,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:16:21,074 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:16:21,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:16:21,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1286102758, now seen corresponding path program 2 times [2020-07-20 06:16:21,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:16:21,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334966981] [2020-07-20 06:16:21,076 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@211968dd [2020-07-20 06:16:21,083 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:16:21,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338303354] [2020-07-20 06:16:21,083 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@118674b4 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 06:16:21,128 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@118674b4 issued 4 check-sat command(s) [2020-07-20 06:16:21,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:16:21,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 06:16:21,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:16:23,601 WARN L193 SmtUtils]: Spent 2.38 s on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 06:16:26,145 WARN L193 SmtUtils]: Spent 2.26 s on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 06:16:26,714 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-20 06:16:26,724 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:16:27,319 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 06:16:27,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334966981] [2020-07-20 06:16:27,319 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:16:27,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338303354] [2020-07-20 06:16:27,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:16:27,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-20 06:16:27,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683972182] [2020-07-20 06:16:27,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 06:16:27,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:16:27,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 06:16:27,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-20 06:16:27,330 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 10 states. [2020-07-20 06:16:36,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:16:36,482 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-07-20 06:16:36,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 06:16:36,554 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-07-20 06:16:36,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:16:36,555 INFO L225 Difference]: With dead ends: 60 [2020-07-20 06:16:36,555 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 06:16:36,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 06:16:36,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 06:16:36,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-07-20 06:16:36,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 06:16:36,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2020-07-20 06:16:36,572 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 37 [2020-07-20 06:16:36,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:16:36,572 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2020-07-20 06:16:36,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 06:16:36,573 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2020-07-20 06:16:36,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 06:16:36,574 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:16:36,575 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 06:16:36,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:16:36,777 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:16:36,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:16:36,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1343361060, now seen corresponding path program 1 times [2020-07-20 06:16:36,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:16:36,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134799413] [2020-07-20 06:16:36,779 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@211968dd [2020-07-20 06:16:36,783 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:16:36,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572777431] [2020-07-20 06:16:36,784 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7303d107 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:16:36,821 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7303d107 issued 2 check-sat command(s) [2020-07-20 06:16:36,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:16:36,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 06:16:36,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:16:36,875 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 06:16:36,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134799413] [2020-07-20 06:16:36,875 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:16:36,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572777431] [2020-07-20 06:16:36,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:16:36,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-07-20 06:16:36,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795007630] [2020-07-20 06:16:36,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 06:16:36,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:16:36,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 06:16:36,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:16:36,878 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 5 states. [2020-07-20 06:16:36,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:16:36,955 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-07-20 06:16:36,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 06:16:36,960 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-07-20 06:16:36,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:16:36,961 INFO L225 Difference]: With dead ends: 66 [2020-07-20 06:16:36,961 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 06:16:36,962 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 06:16:36,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 06:16:36,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-07-20 06:16:36,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 06:16:36,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-07-20 06:16:36,974 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 37 [2020-07-20 06:16:36,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:16:36,975 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-07-20 06:16:36,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 06:16:36,975 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-07-20 06:16:36,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 06:16:36,976 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:16:36,977 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 06:16:37,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:16:37,192 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:16:37,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:16:37,193 INFO L82 PathProgramCache]: Analyzing trace with hash 332243810, now seen corresponding path program 2 times [2020-07-20 06:16:37,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:16:37,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898364633] [2020-07-20 06:16:37,194 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@211968dd [2020-07-20 06:16:37,198 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:16:37,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399360887] [2020-07-20 06:16:37,199 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3a24331f 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 06:16:37,250 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3a24331f issued 4 check-sat command(s) [2020-07-20 06:16:37,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:16:37,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 06:16:37,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:16:41,693 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 06:16:50,141 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 06:16:50,144 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:16:56,470 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 06:16:56,474 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:17:04,880 WARN L838 $PredicateComparison]: unable to prove that (or (and (<= 0 c___VERIFIER_assert_~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)))))) (<= 1 c___VERIFIER_assert_~cond)) is different from false [2020-07-20 06:17:06,955 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:17:15,203 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 06:17:17,253 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 06:17:17,258 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 06:17:17,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898364633] [2020-07-20 06:17:17,259 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:17:17,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399360887] [2020-07-20 06:17:17,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:17:17,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-20 06:17:17,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432728162] [2020-07-20 06:17:17,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 06:17:17,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:17:17,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 06:17:17,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=9, Unknown=10, NotChecked=24, Total=56 [2020-07-20 06:17:17,261 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 8 states. [2020-07-20 06:18:11,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:18:11,104 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2020-07-20 06:18:11,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 06:18:11,154 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-07-20 06:18:11,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:18:11,155 INFO L225 Difference]: With dead ends: 66 [2020-07-20 06:18:11,155 INFO L226 Difference]: Without dead ends: 64 [2020-07-20 06:18:11,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=13, Invalid=9, Unknown=10, NotChecked=24, Total=56 [2020-07-20 06:18:11,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-20 06:18:11,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-07-20 06:18:11,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-20 06:18:11,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2020-07-20 06:18:11,169 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 37 [2020-07-20 06:18:11,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:18:11,169 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2020-07-20 06:18:11,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 06:18:11,170 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2020-07-20 06:18:11,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 06:18:11,171 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:18:11,171 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 06:18:11,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-07-20 06:18:11,374 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:18:11,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:18:11,375 INFO L82 PathProgramCache]: Analyzing trace with hash 584019147, now seen corresponding path program 3 times [2020-07-20 06:18:11,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:18:11,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172717945] [2020-07-20 06:18:11,376 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@211968dd [2020-07-20 06:18:11,380 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:18:11,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1676186236] [2020-07-20 06:18:11,381 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@606c6802 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:18:11,427 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@606c6802 issued 4 check-sat command(s) [2020-07-20 06:18:11,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:18:11,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 06:18:11,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:18:11,593 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 06:18:11,916 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 06:18:12,408 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 06:18:13,008 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 06:18:13,012 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:18:38,634 WARN L193 SmtUtils]: Spent 13.76 s on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 06:18:38,638 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:18:46,852 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 06:18:48,967 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:18:57,202 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 06:18:59,233 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 06:18:59,238 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 06:18:59,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172717945] [2020-07-20 06:18:59,239 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:18:59,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676186236] [2020-07-20 06:18:59,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:18:59,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 06:18:59,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705118433] [2020-07-20 06:18:59,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 06:18:59,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:18:59,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 06:18:59,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=30, Unknown=5, NotChecked=22, Total=72 [2020-07-20 06:18:59,241 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 9 states. [2020-07-20 06:20:16,109 WARN L193 SmtUtils]: Spent 36.16 s on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 06:20:28,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:20:28,835 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-07-20 06:20:28,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 06:20:28,864 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-07-20 06:20:28,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:20:28,865 INFO L225 Difference]: With dead ends: 76 [2020-07-20 06:20:28,865 INFO L226 Difference]: Without dead ends: 74 [2020-07-20 06:20:28,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 73.2s TimeCoverageRelationStatistics Valid=18, Invalid=39, Unknown=7, NotChecked=26, Total=90 [2020-07-20 06:20:28,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-20 06:20:28,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2020-07-20 06:20:28,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 06:20:28,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-07-20 06:20:28,880 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 45 [2020-07-20 06:20:28,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:20:28,880 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-07-20 06:20:28,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 06:20:28,881 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-07-20 06:20:28,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 06:20:28,882 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:20:28,882 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 06:20:29,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:20:29,085 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:20:29,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:20:29,086 INFO L82 PathProgramCache]: Analyzing trace with hash 641277449, now seen corresponding path program 2 times [2020-07-20 06:20:29,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:20:29,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413245529] [2020-07-20 06:20:29,087 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@211968dd [2020-07-20 06:20:29,090 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:20:29,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689662270] [2020-07-20 06:20:29,091 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6877694f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:20:29,153 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6877694f issued 4 check-sat command(s) [2020-07-20 06:20:29,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:20:29,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 06:20:29,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:20:29,334 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 06:20:29,745 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 06:20:30,374 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 06:20:35,101 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 06:20:35,106 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:20:41,434 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 06:20:41,438 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:20:49,747 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 06:20:51,806 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:21:00,281 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 06:21:02,315 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 06:21:02,320 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 06:21:02,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413245529] [2020-07-20 06:21:02,320 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:21:02,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689662270] [2020-07-20 06:21:02,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:21:02,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 06:21:02,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198323870] [2020-07-20 06:21:02,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 06:21:02,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:21:02,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 06:21:02,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=21, Unknown=6, NotChecked=30, Total=72 [2020-07-20 06:21:02,322 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 9 states. [2020-07-20 06:21:44,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:21:44,769 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2020-07-20 06:21:44,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 06:21:44,791 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-07-20 06:21:44,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:21:44,793 INFO L225 Difference]: With dead ends: 78 [2020-07-20 06:21:44,793 INFO L226 Difference]: Without dead ends: 76 [2020-07-20 06:21:44,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=15, Invalid=21, Unknown=6, NotChecked=30, Total=72 [2020-07-20 06:21:44,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-20 06:21:44,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-07-20 06:21:44,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 06:21:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-07-20 06:21:44,807 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 45 [2020-07-20 06:21:44,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:21:44,807 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-07-20 06:21:44,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 06:21:44,807 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-07-20 06:21:44,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 06:21:44,809 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:21:44,809 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 06:21:45,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:21:45,019 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:21:45,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:21:45,020 INFO L82 PathProgramCache]: Analyzing trace with hash -150985083, now seen corresponding path program 3 times [2020-07-20 06:21:45,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:21:45,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279886176] [2020-07-20 06:21:45,021 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@211968dd [2020-07-20 06:21:45,024 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:21:45,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611364614] [2020-07-20 06:21:45,025 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@708ce7da No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:21:45,098 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@708ce7da issued 4 check-sat command(s) [2020-07-20 06:21:45,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:21:45,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 06:21:45,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:21:45,287 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 06:21:49,685 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 06:22:05,377 WARN L193 SmtUtils]: Spent 8.88 s on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 06:22:26,937 WARN L193 SmtUtils]: Spent 8.90 s on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 06:22:51,096 WARN L193 SmtUtils]: Spent 6.91 s on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 06:22:51,101 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 06:22:52,114 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 06:22:52,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279886176] [2020-07-20 06:22:52,115 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:22:52,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611364614] [2020-07-20 06:22:52,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:22:52,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-20 06:22:52,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995631112] [2020-07-20 06:22:52,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 06:22:52,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:22:52,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 06:22:52,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=70, Unknown=19, NotChecked=0, Total=110 [2020-07-20 06:22:52,117 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 11 states. [2020-07-20 06:25:26,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:25:26,463 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2020-07-20 06:25:26,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 06:25:26,493 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-07-20 06:25:26,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:25:26,495 INFO L225 Difference]: With dead ends: 84 [2020-07-20 06:25:26,495 INFO L226 Difference]: Without dead ends: 82 [2020-07-20 06:25:26,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 67.4s TimeCoverageRelationStatistics Valid=32, Invalid=105, Unknown=19, NotChecked=0, Total=156 [2020-07-20 06:25:26,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-20 06:25:26,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2020-07-20 06:25:26,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-20 06:25:26,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2020-07-20 06:25:26,515 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 45 [2020-07-20 06:25:26,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:25:26,515 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2020-07-20 06:25:26,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 06:25:26,515 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2020-07-20 06:25:26,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 06:25:26,517 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:25:26,517 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 06:25:26,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-07-20 06:25:26,735 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:25:26,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:25:26,735 INFO L82 PathProgramCache]: Analyzing trace with hash -53426768, now seen corresponding path program 4 times [2020-07-20 06:25:26,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:25:26,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393670273] [2020-07-20 06:25:26,737 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@211968dd [2020-07-20 06:25:26,747 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:25:26,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829360449] [2020-07-20 06:25:26,748 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@736f3067 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 06:25:26,811 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@736f3067 issued 4 check-sat command(s) [2020-07-20 06:25:26,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:25:26,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 06:25:26,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:25:27,033 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 06:25:27,506 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 06:25:28,224 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 06:25:29,152 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 06:25:30,232 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 06:25:30,234 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:25:36,519 WARN L838 $PredicateComparison]: unable to prove that (or (and (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))))) (<= 0 |c___VERIFIER_assert_#in~cond|)) (<= 1 |c___VERIFIER_assert_#in~cond|)) is different from false [2020-07-20 06:25:36,522 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:25:45,222 WARN L838 $PredicateComparison]: unable to prove that (or (and (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))))) (<= 0 c___VERIFIER_assert_~cond)) (<= 1 c___VERIFIER_assert_~cond)) is different from false [2020-07-20 06:25:47,265 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:25:55,598 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 06:25:57,640 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 06:25:57,647 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 06:25:57,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393670273] [2020-07-20 06:25:57,648 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:25:57,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829360449] [2020-07-20 06:25:57,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:25:57,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 06:25:57,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559990010] [2020-07-20 06:25:57,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 06:25:57,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:25:57,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 06:25:57,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=33, Unknown=4, NotChecked=36, Total=90 [2020-07-20 06:25:57,650 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand 10 states. [2020-07-20 06:26:48,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:26:48,456 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2020-07-20 06:26:48,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 06:26:48,480 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-07-20 06:26:48,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:26:48,482 INFO L225 Difference]: With dead ends: 90 [2020-07-20 06:26:48,482 INFO L226 Difference]: Without dead ends: 88 [2020-07-20 06:26:48,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=17, Invalid=33, Unknown=4, NotChecked=36, Total=90 [2020-07-20 06:26:48,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-20 06:26:48,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2020-07-20 06:26:48,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-20 06:26:48,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2020-07-20 06:26:48,494 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 53 [2020-07-20 06:26:48,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:26:48,495 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2020-07-20 06:26:48,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 06:26:48,495 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2020-07-20 06:26:48,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 06:26:48,496 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:26:48,496 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 06:26:48,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:26:48,709 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:26:48,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:26:48,710 INFO L82 PathProgramCache]: Analyzing trace with hash 3831534, now seen corresponding path program 3 times [2020-07-20 06:26:48,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:26:48,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626077263] [2020-07-20 06:26:48,711 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@211968dd [2020-07-20 06:26:48,719 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:26:48,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [774349935] [2020-07-20 06:26:48,721 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7a094af6 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:26:48,807 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7a094af6 issued 4 check-sat command(s) [2020-07-20 06:26:48,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:26:48,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-20 06:26:48,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:26:50,998 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 06:26:54,297 WARN L193 SmtUtils]: Spent 2.58 s on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 06:26:58,099 WARN L193 SmtUtils]: Spent 2.72 s on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 06:27:04,391 WARN L193 SmtUtils]: Spent 5.51 s on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 06:27:13,712 WARN L193 SmtUtils]: Spent 7.85 s on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-07-20 06:27:26,068 WARN L193 SmtUtils]: Spent 4.91 s on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 06:27:26,075 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:27:27,792 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 06:27:27,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626077263] [2020-07-20 06:27:27,793 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:27:27,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774349935] [2020-07-20 06:27:27,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:27:27,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-20 06:27:27,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465982877] [2020-07-20 06:27:27,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 06:27:27,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:27:27,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 06:27:27,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=127, Unknown=3, NotChecked=0, Total=156 [2020-07-20 06:27:27,795 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand 13 states.