/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 NUM_VARIABLES --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 01:55:11,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:55:11,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:55:11,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 01:55:11,543 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 01:55:11,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 01:55:11,548 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 01:55:11,554 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 01:55:11,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 01:55:11,557 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 01:55:11,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 01:55:11,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 01:55:11,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:55:11,567 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:55:11,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:55:11,570 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:55:11,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:55:11,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:55:11,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:55:11,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:55:11,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:55:11,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:55:11,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:55:11,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:55:11,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 01:55:11,612 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:55:11,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:55:11,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:55:11,616 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 01:55:11,647 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:55:11,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:55:11,649 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:55:11,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:55:11,650 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:55:11,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:55:11,651 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:55:11,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:55:11,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:55:11,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:55:11,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:55:11,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:55:11,653 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:55:11,654 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:55:11,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:55:11,654 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:55:11,654 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:55:11,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:55:11,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:55:11,655 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:55:11,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:55:11,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:55:11,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:55:11,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:55:11,656 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:55:11,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:55:11,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:55:11,657 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:55:11,657 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:55:11,657 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 01:55:11,966 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:55:11,985 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:55:11,989 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:55:11,990 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:55:11,991 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:55:11,992 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/fermat2.c [2020-07-20 01:55:12,071 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3ea73df9/5f9516e729fe4873b40f12e4fbd7a442/FLAG8b4b48e60 [2020-07-20 01:55:12,560 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:55:12,563 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/fermat2.c [2020-07-20 01:55:12,571 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3ea73df9/5f9516e729fe4873b40f12e4fbd7a442/FLAG8b4b48e60 [2020-07-20 01:55:12,939 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3ea73df9/5f9516e729fe4873b40f12e4fbd7a442 [2020-07-20 01:55:12,949 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:55:12,952 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:55:12,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:55:12,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:55:12,957 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:55:12,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:55:12" (1/1) ... [2020-07-20 01:55:12,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@420d4668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:12, skipping insertion in model container [2020-07-20 01:55:12,961 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:55:12" (1/1) ... [2020-07-20 01:55:12,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:55:12,989 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:55:13,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:55:13,221 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:55:13,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:55:13,251 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:55:13,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:13 WrapperNode [2020-07-20 01:55:13,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:55:13,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:55:13,253 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:55:13,253 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:55:13,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:13" (1/1) ... [2020-07-20 01:55:13,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:13" (1/1) ... [2020-07-20 01:55:13,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:13" (1/1) ... [2020-07-20 01:55:13,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:13" (1/1) ... [2020-07-20 01:55:13,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:13" (1/1) ... [2020-07-20 01:55:13,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:13" (1/1) ... [2020-07-20 01:55:13,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:13" (1/1) ... [2020-07-20 01:55:13,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:55:13,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:55:13,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:55:13,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:55:13,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:13" (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 01:55:13,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:55:13,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:55:13,416 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 01:55:13,416 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 01:55:13,416 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:55:13,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:55:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-07-20 01:55:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 01:55:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 01:55:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 01:55:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:55:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:55:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:55:13,648 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:55:13,648 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 01:55:13,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:55:13 BoogieIcfgContainer [2020-07-20 01:55:13,655 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:55:13,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:55:13,670 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:55:13,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:55:13,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:55:12" (1/3) ... [2020-07-20 01:55:13,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19435e9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:55:13, skipping insertion in model container [2020-07-20 01:55:13,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:13" (2/3) ... [2020-07-20 01:55:13,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19435e9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:55:13, skipping insertion in model container [2020-07-20 01:55:13,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:55:13" (3/3) ... [2020-07-20 01:55:13,691 INFO L109 eAbstractionObserver]: Analyzing ICFG fermat2.c [2020-07-20 01:55:13,717 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:55:13,731 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:55:13,754 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:55:13,785 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:55:13,785 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:55:13,785 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:55:13,786 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:55:13,786 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:55:13,786 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:55:13,786 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:55:13,786 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:55:13,802 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-07-20 01:55:13,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 01:55:13,807 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:55:13,808 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 01:55:13,809 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:55:13,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:55:13,814 INFO L82 PathProgramCache]: Analyzing trace with hash -849943384, now seen corresponding path program 1 times [2020-07-20 01:55:13,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:55:13,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758002282] [2020-07-20 01:55:13,822 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6b438b2f [2020-07-20 01:55:13,895 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:55:13,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998358819] [2020-07-20 01:55:13,898 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@44f5e4ab 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 01:55:14,055 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@44f5e4ab issued 2 check-sat command(s) [2020-07-20 01:55:14,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:55:14,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 01:55:14,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:55:14,085 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 01:55:14,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758002282] [2020-07-20 01:55:14,086 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 01:55:14,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998358819] [2020-07-20 01:55:14,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:55:14,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 01:55:14,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030994597] [2020-07-20 01:55:14,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 01:55:14,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:55:14,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 01:55:14,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 01:55:14,111 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-07-20 01:55:14,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:55:14,141 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2020-07-20 01:55:14,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 01:55:14,143 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-20 01:55:14,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:55:14,153 INFO L225 Difference]: With dead ends: 50 [2020-07-20 01:55:14,154 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 01:55:14,157 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 01:55:14,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 01:55:14,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-20 01:55:14,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 01:55:14,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-07-20 01:55:14,205 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 21 [2020-07-20 01:55:14,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:55:14,206 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-07-20 01:55:14,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 01:55:14,206 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-07-20 01:55:14,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 01:55:14,209 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:55:14,209 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 01:55:14,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-07-20 01:55:14,423 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:55:14,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:55:14,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1193991140, now seen corresponding path program 1 times [2020-07-20 01:55:14,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:55:14,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806549921] [2020-07-20 01:55:14,427 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6b438b2f [2020-07-20 01:55:14,435 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:55:14,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885358307] [2020-07-20 01:55:14,438 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@592990d2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:55:14,505 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@592990d2 issued 4 check-sat command(s) [2020-07-20 01:55:14,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:55:14,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 01:55:14,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:55:14,585 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:55:28,970 WARN L193 SmtUtils]: Spent 8.17 s on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 01:55:28,974 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:55:47,060 WARN L193 SmtUtils]: Spent 9.11 s on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 01:55:49,139 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:55:57,405 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 01:55:59,430 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 01:55:59,434 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 01:55:59,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806549921] [2020-07-20 01:55:59,435 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 01:55:59,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885358307] [2020-07-20 01:55:59,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:55:59,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 01:55:59,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004606080] [2020-07-20 01:55:59,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 01:55:59,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:55:59,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 01:55:59,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=4, NotChecked=6, Total=30 [2020-07-20 01:55:59,444 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 6 states. [2020-07-20 01:56:38,305 WARN L193 SmtUtils]: Spent 34.61 s on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 01:56:49,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:56:49,086 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-07-20 01:56:49,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 01:56:49,090 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-07-20 01:56:49,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:56:49,093 INFO L225 Difference]: With dead ends: 34 [2020-07-20 01:56:49,093 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 01:56:49,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=4, NotChecked=8, Total=42 [2020-07-20 01:56:49,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 01:56:49,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-07-20 01:56:49,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 01:56:49,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-20 01:56:49,105 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 21 [2020-07-20 01:56:49,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:56:49,108 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-20 01:56:49,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 01:56:49,108 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-20 01:56:49,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 01:56:49,109 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:56:49,109 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 01:56:49,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:56:49,312 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:56:49,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:56:49,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1415100442, now seen corresponding path program 1 times [2020-07-20 01:56:49,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:56:49,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600019840] [2020-07-20 01:56:49,315 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6b438b2f [2020-07-20 01:56:49,319 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:56:49,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264809124] [2020-07-20 01:56:49,320 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@429ee9a3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:56:49,366 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@429ee9a3 issued 4 check-sat command(s) [2020-07-20 01:56:49,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:56:49,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 01:56:49,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:56:49,473 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:56:49,640 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 01:56:49,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600019840] [2020-07-20 01:56:49,641 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 01:56:49,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264809124] [2020-07-20 01:56:49,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:56:49,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 01:56:49,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405722884] [2020-07-20 01:56:49,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 01:56:49,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:56:49,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 01:56:49,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-20 01:56:49,643 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 8 states. [2020-07-20 01:56:57,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:56:57,630 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-07-20 01:56:57,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 01:56:57,637 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-07-20 01:56:57,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:56:57,640 INFO L225 Difference]: With dead ends: 35 [2020-07-20 01:56:57,641 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 01:56:57,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-20 01:56:57,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 01:56:57,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 01:56:57,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 01:56:57,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-07-20 01:56:57,650 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 27 [2020-07-20 01:56:57,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:56:57,650 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-07-20 01:56:57,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 01:56:57,650 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-07-20 01:56:57,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 01:56:57,651 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:56:57,651 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 01:56:57,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:56:57,856 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:56:57,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:56:57,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1831429119, now seen corresponding path program 1 times [2020-07-20 01:56:57,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:56:57,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886010952] [2020-07-20 01:56:57,858 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6b438b2f [2020-07-20 01:56:57,861 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:56:57,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718247345] [2020-07-20 01:56:57,862 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@997ee73 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 01:56:57,914 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@997ee73 issued 4 check-sat command(s) [2020-07-20 01:56:57,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:56:57,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 01:56:57,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:57:08,637 WARN L193 SmtUtils]: Spent 8.43 s on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 01:57:17,425 WARN L193 SmtUtils]: Spent 8.57 s on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 01:57:17,437 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:57:17,683 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 01:57:17,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886010952] [2020-07-20 01:57:17,684 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 01:57:17,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718247345] [2020-07-20 01:57:17,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:57:17,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 01:57:17,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126701861] [2020-07-20 01:57:17,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 01:57:17,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:57:17,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 01:57:17,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=54, Unknown=1, NotChecked=0, Total=72 [2020-07-20 01:57:17,691 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-07-20 01:57:33,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:57:33,259 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-07-20 01:57:33,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 01:57:33,271 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-20 01:57:33,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:57:33,272 INFO L225 Difference]: With dead ends: 40 [2020-07-20 01:57:33,272 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 01:57:33,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=28, Invalid=81, Unknown=1, NotChecked=0, Total=110 [2020-07-20 01:57:33,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 01:57:33,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-07-20 01:57:33,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 01:57:33,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-07-20 01:57:33,282 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 29 [2020-07-20 01:57:33,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:57:33,282 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-07-20 01:57:33,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 01:57:33,282 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-07-20 01:57:33,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 01:57:33,283 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:57:33,284 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 01:57:33,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:57:33,485 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:57:33,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:57:33,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1774170817, now seen corresponding path program 1 times [2020-07-20 01:57:33,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:57:33,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659137773] [2020-07-20 01:57:33,487 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6b438b2f [2020-07-20 01:57:33,491 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:57:33,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383304927] [2020-07-20 01:57:33,491 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@a241485 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:57:33,539 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@a241485 issued 4 check-sat command(s) [2020-07-20 01:57:33,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:57:33,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 01:57:33,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:57:44,326 WARN L193 SmtUtils]: Spent 8.39 s on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 01:58:01,265 WARN L193 SmtUtils]: Spent 8.58 s on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 01:58:01,274 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:58:01,622 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 01:58:01,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659137773] [2020-07-20 01:58:01,622 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 01:58:01,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383304927] [2020-07-20 01:58:01,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:58:01,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 01:58:01,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102394396] [2020-07-20 01:58:01,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 01:58:01,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:58:01,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 01:58:01,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=50, Unknown=5, NotChecked=0, Total=72 [2020-07-20 01:58:01,625 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 9 states. [2020-07-20 01:58:29,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:58:29,959 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-07-20 01:58:29,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 01:58:29,961 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-20 01:58:29,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:58:29,963 INFO L225 Difference]: With dead ends: 46 [2020-07-20 01:58:29,963 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 01:58:29,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=28, Invalid=77, Unknown=5, NotChecked=0, Total=110 [2020-07-20 01:58:29,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 01:58:29,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2020-07-20 01:58:29,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 01:58:29,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-07-20 01:58:29,982 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 29 [2020-07-20 01:58:29,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:58:29,982 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-07-20 01:58:29,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 01:58:29,982 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-07-20 01:58:29,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 01:58:29,983 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:58:29,984 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 01:58:30,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:58:30,187 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:58:30,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:58:30,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1286102758, now seen corresponding path program 2 times [2020-07-20 01:58:30,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:58:30,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723032832] [2020-07-20 01:58:30,189 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6b438b2f [2020-07-20 01:58:30,192 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:58:30,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087676257] [2020-07-20 01:58:30,193 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1efa4fd7 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 01:58:30,231 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1efa4fd7 issued 4 check-sat command(s) [2020-07-20 01:58:30,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:58:30,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 01:58:30,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:58:31,060 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 01:58:31,718 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-20 01:58:31,730 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:58:32,194 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 01:58:32,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723032832] [2020-07-20 01:58:32,194 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 01:58:32,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087676257] [2020-07-20 01:58:32,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:58:32,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-20 01:58:32,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150231830] [2020-07-20 01:58:32,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 01:58:32,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:58:32,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 01:58:32,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-20 01:58:32,197 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 10 states. [2020-07-20 01:58:41,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:58:41,774 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-07-20 01:58:41,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 01:58:41,788 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-07-20 01:58:41,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:58:41,789 INFO L225 Difference]: With dead ends: 60 [2020-07-20 01:58:41,789 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 01:58:41,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 01:58:41,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 01:58:41,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-07-20 01:58:41,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 01:58:41,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2020-07-20 01:58:41,803 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 37 [2020-07-20 01:58:41,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:58:41,803 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2020-07-20 01:58:41,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 01:58:41,803 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2020-07-20 01:58:41,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 01:58:41,805 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:58:41,805 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 01:58:42,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:58:42,006 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:58:42,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:58:42,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1343361060, now seen corresponding path program 1 times [2020-07-20 01:58:42,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:58:42,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935991146] [2020-07-20 01:58:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6b438b2f [2020-07-20 01:58:42,012 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:58:42,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [144042145] [2020-07-20 01:58:42,012 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2b200b52 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:58:42,045 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2b200b52 issued 2 check-sat command(s) [2020-07-20 01:58:42,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:58:42,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 01:58:42,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:58:42,092 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 01:58:42,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935991146] [2020-07-20 01:58:42,093 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 01:58:42,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144042145] [2020-07-20 01:58:42,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:58:42,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-07-20 01:58:42,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351615534] [2020-07-20 01:58:42,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:58:42,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:58:42,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:58:42,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:58:42,097 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 5 states. [2020-07-20 01:58:42,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:58:42,211 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-07-20 01:58:42,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 01:58:42,216 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-07-20 01:58:42,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:58:42,218 INFO L225 Difference]: With dead ends: 66 [2020-07-20 01:58:42,218 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 01:58:42,220 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 01:58:42,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 01:58:42,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-07-20 01:58:42,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 01:58:42,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-07-20 01:58:42,242 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 37 [2020-07-20 01:58:42,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:58:42,243 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-07-20 01:58:42,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:58:42,243 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-07-20 01:58:42,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 01:58:42,248 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:58:42,252 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 01:58:42,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:58:42,467 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:58:42,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:58:42,467 INFO L82 PathProgramCache]: Analyzing trace with hash 332243810, now seen corresponding path program 2 times [2020-07-20 01:58:42,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:58:42,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222671769] [2020-07-20 01:58:42,468 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6b438b2f [2020-07-20 01:58:42,471 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:58:42,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701406781] [2020-07-20 01:58:42,472 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2619e4b1 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 01:58:42,518 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2619e4b1 issued 4 check-sat command(s) [2020-07-20 01:58:42,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:58:42,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 01:58:42,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:58:47,045 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 01:58:55,576 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 01:58:55,580 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:59:18,897 WARN L193 SmtUtils]: Spent 13.59 s on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 01:59:18,900 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:59:27,198 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 01:59:29,276 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:59:37,574 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 01:59:39,606 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 01:59:39,610 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 01:59:39,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222671769] [2020-07-20 01:59:39,611 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 01:59:39,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701406781] [2020-07-20 01:59:39,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:59:39,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-20 01:59:39,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319736241] [2020-07-20 01:59:39,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 01:59:39,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:59:39,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 01:59:39,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=15, Unknown=10, NotChecked=18, Total=56 [2020-07-20 01:59:39,613 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 8 states. [2020-07-20 02:01:11,109 WARN L193 SmtUtils]: Spent 38.08 s on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 02:01:29,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:29,730 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2020-07-20 02:01:29,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 02:01:29,746 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-07-20 02:01:29,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:29,747 INFO L225 Difference]: With dead ends: 66 [2020-07-20 02:01:29,748 INFO L226 Difference]: Without dead ends: 64 [2020-07-20 02:01:29,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 82.0s TimeCoverageRelationStatistics Valid=16, Invalid=22, Unknown=12, NotChecked=22, Total=72 [2020-07-20 02:01:29,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-20 02:01:29,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-07-20 02:01:29,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-20 02:01:29,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2020-07-20 02:01:29,760 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 37 [2020-07-20 02:01:29,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:29,760 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2020-07-20 02:01:29,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 02:01:29,761 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2020-07-20 02:01:29,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 02:01:29,762 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:29,762 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 02:01:29,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-07-20 02:01:29,963 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:29,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:29,964 INFO L82 PathProgramCache]: Analyzing trace with hash 584019147, now seen corresponding path program 3 times [2020-07-20 02:01:29,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:29,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027242644] [2020-07-20 02:01:29,965 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6b438b2f [2020-07-20 02:01:29,972 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:29,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170146532] [2020-07-20 02:01:29,972 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4a44900e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:30,026 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4a44900e issued 4 check-sat command(s) [2020-07-20 02:01:30,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:30,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 02:01:30,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:30,228 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 02:01:30,731 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 02:01:31,230 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 02:01:31,945 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 02:01:31,948 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 02:01:38,112 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_#in~cond|)) (<= 1 |c___VERIFIER_assert_#in~cond|)) is different from false [2020-07-20 02:01:38,115 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 02:01:46,398 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 02:01:48,418 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 02:01:56,568 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 02:01:58,601 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 02:01:58,607 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 02:01:58,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027242644] [2020-07-20 02:01:58,608 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:58,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170146532] [2020-07-20 02:01:58,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:58,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 02:01:58,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801726946] [2020-07-20 02:01:58,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 02:01:58,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:58,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 02:01:58,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=23, Unknown=4, NotChecked=30, Total=72 [2020-07-20 02:01:58,611 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 9 states. [2020-07-20 02:02:32,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:02:32,193 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-07-20 02:02:32,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 02:02:32,313 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-07-20 02:02:32,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:02:32,314 INFO L225 Difference]: With dead ends: 76 [2020-07-20 02:02:32,314 INFO L226 Difference]: Without dead ends: 74 [2020-07-20 02:02:32,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=15, Invalid=23, Unknown=4, NotChecked=30, Total=72 [2020-07-20 02:02:32,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-20 02:02:32,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2020-07-20 02:02:32,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 02:02:32,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-07-20 02:02:32,332 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 45 [2020-07-20 02:02:32,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:02:32,333 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-07-20 02:02:32,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 02:02:32,333 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-07-20 02:02:32,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 02:02:32,334 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:02:32,334 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 02:02:32,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:02:32,537 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:02:32,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:02:32,538 INFO L82 PathProgramCache]: Analyzing trace with hash 641277449, now seen corresponding path program 2 times [2020-07-20 02:02:32,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:02:32,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806465449] [2020-07-20 02:02:32,540 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6b438b2f [2020-07-20 02:02:32,544 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:02:32,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372400180] [2020-07-20 02:02:32,544 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2da8641 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:02:32,605 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2da8641 issued 4 check-sat command(s) [2020-07-20 02:02:32,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:02:32,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 02:02:32,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:02:32,811 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 02:02:33,349 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 02:02:34,008 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 02:02:38,830 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 02:02:38,834 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 02:02:45,139 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 02:02:45,142 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 02:02:53,350 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 02:02:55,441 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 02:03:03,741 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 02:03:05,777 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 02:03:05,781 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 02:03:05,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806465449] [2020-07-20 02:03:05,782 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:03:05,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372400180] [2020-07-20 02:03:05,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:03:05,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 02:03:05,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638915874] [2020-07-20 02:03:05,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 02:03:05,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:03:05,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 02:03:05,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=21, Unknown=6, NotChecked=30, Total=72 [2020-07-20 02:03:05,783 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 9 states. [2020-07-20 02:03:46,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:03:46,745 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2020-07-20 02:03:46,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 02:03:46,778 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-07-20 02:03:46,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:03:46,780 INFO L225 Difference]: With dead ends: 78 [2020-07-20 02:03:46,780 INFO L226 Difference]: Without dead ends: 76 [2020-07-20 02:03:46,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=15, Invalid=21, Unknown=6, NotChecked=30, Total=72 [2020-07-20 02:03:46,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-20 02:03:46,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-07-20 02:03:46,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 02:03:46,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-07-20 02:03:46,793 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 45 [2020-07-20 02:03:46,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:03:46,793 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-07-20 02:03:46,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 02:03:46,793 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-07-20 02:03:46,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 02:03:46,794 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:03:46,795 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 02:03:46,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:03:46,996 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:03:46,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:03:46,997 INFO L82 PathProgramCache]: Analyzing trace with hash -150985083, now seen corresponding path program 3 times [2020-07-20 02:03:46,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:03:46,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079280510] [2020-07-20 02:03:46,998 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6b438b2f [2020-07-20 02:03:47,001 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:03:47,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468269466] [2020-07-20 02:03:47,001 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@793bd40a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:03:47,093 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@793bd40a issued 4 check-sat command(s) [2020-07-20 02:03:47,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:03:47,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 02:03:47,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:03:47,298 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 02:03:51,685 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 02:04:06,970 WARN L193 SmtUtils]: Spent 8.58 s on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 02:04:28,332 WARN L193 SmtUtils]: Spent 8.71 s on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 02:04:53,302 WARN L193 SmtUtils]: Spent 7.05 s on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 02:04:53,307 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 02:04:54,189 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 02:04:54,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079280510] [2020-07-20 02:04:54,190 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:04:54,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468269466] [2020-07-20 02:04:54,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:04:54,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-20 02:04:54,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402893692] [2020-07-20 02:04:54,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 02:04:54,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:04:54,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 02:04:54,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=70, Unknown=19, NotChecked=0, Total=110 [2020-07-20 02:04:54,192 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 11 states. [2020-07-20 02:06:53,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:06:53,856 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2020-07-20 02:06:53,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 02:06:53,929 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-07-20 02:06:53,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:06:53,930 INFO L225 Difference]: With dead ends: 84 [2020-07-20 02:06:53,930 INFO L226 Difference]: Without dead ends: 82 [2020-07-20 02:06:53,931 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 02:06:53,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-20 02:06:53,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2020-07-20 02:06:53,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-20 02:06:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2020-07-20 02:06:53,943 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 45 [2020-07-20 02:06:53,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:06:53,944 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2020-07-20 02:06:53,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 02:06:53,944 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2020-07-20 02:06:53,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 02:06:53,945 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:06:53,945 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 02:06:54,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-07-20 02:06:54,148 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:06:54,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:06:54,149 INFO L82 PathProgramCache]: Analyzing trace with hash -53426768, now seen corresponding path program 4 times [2020-07-20 02:06:54,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:06:54,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037832326] [2020-07-20 02:06:54,150 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6b438b2f [2020-07-20 02:06:54,153 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:06:54,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [898282563] [2020-07-20 02:06:54,154 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31dca602 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 02:06:54,220 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31dca602 issued 4 check-sat command(s) [2020-07-20 02:06:54,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:06:54,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 02:06:54,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:06:54,381 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 02:06:54,988 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 02:06:55,694 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 02:06:56,547 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 02:06:57,580 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 02:06:57,582 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 02:07:03,858 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 02:07:03,861 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 02:07:12,187 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 02:07:14,218 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 02:07:22,455 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 02:07:24,497 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 02:07:24,503 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 02:07:24,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037832326] [2020-07-20 02:07:24,504 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:07:24,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898282563] [2020-07-20 02:07:24,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:07:24,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 02:07:24,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603500972] [2020-07-20 02:07:24,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 02:07:24,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:07:24,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 02:07:24,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=33, Unknown=4, NotChecked=36, Total=90 [2020-07-20 02:07:24,505 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand 10 states. [2020-07-20 02:08:02,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:08:02,532 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2020-07-20 02:08:02,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 02:08:02,616 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-07-20 02:08:02,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:08:02,617 INFO L225 Difference]: With dead ends: 90 [2020-07-20 02:08:02,617 INFO L226 Difference]: Without dead ends: 88 [2020-07-20 02:08:02,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=17, Invalid=33, Unknown=4, NotChecked=36, Total=90 [2020-07-20 02:08:02,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-20 02:08:02,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2020-07-20 02:08:02,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-20 02:08:02,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2020-07-20 02:08:02,636 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 53 [2020-07-20 02:08:02,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:08:02,637 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2020-07-20 02:08:02,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 02:08:02,638 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2020-07-20 02:08:02,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 02:08:02,640 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:08:02,640 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 02:08:02,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:08:02,841 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:08:02,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:08:02,842 INFO L82 PathProgramCache]: Analyzing trace with hash 3831534, now seen corresponding path program 3 times [2020-07-20 02:08:02,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:08:02,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016307241] [2020-07-20 02:08:02,843 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6b438b2f [2020-07-20 02:08:02,846 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:08:02,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645557684] [2020-07-20 02:08:02,847 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@37fc9e84 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:08:02,930 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@37fc9e84 issued 4 check-sat command(s) [2020-07-20 02:08:02,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:08:02,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-20 02:08:02,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:08:05,189 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 02:08:08,614 WARN L193 SmtUtils]: Spent 2.90 s on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 02:08:12,029 WARN L193 SmtUtils]: Spent 2.51 s on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 02:08:16,295 WARN L193 SmtUtils]: Spent 3.21 s on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 02:08:23,871 WARN L193 SmtUtils]: Spent 6.02 s on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-07-20 02:08:35,731 WARN L193 SmtUtils]: Spent 2.99 s on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 02:08:35,737 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 02:08:37,548 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 02:08:37,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016307241] [2020-07-20 02:08:37,549 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:08:37,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645557684] [2020-07-20 02:08:37,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:08:37,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-20 02:08:37,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503493799] [2020-07-20 02:08:37,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 02:08:37,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:08:37,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 02:08:37,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=127, Unknown=3, NotChecked=0, Total=156 [2020-07-20 02:08:37,551 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand 13 states. [2020-07-20 02:09:12,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:09:12,420 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2020-07-20 02:09:12,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 02:09:12,472 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-07-20 02:09:12,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:09:12,473 INFO L225 Difference]: With dead ends: 92 [2020-07-20 02:09:12,473 INFO L226 Difference]: Without dead ends: 90 [2020-07-20 02:09:12,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 34.1s TimeCoverageRelationStatistics Valid=37, Invalid=170, Unknown=3, NotChecked=0, Total=210 [2020-07-20 02:09:12,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-20 02:09:12,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-07-20 02:09:12,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-20 02:09:12,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2020-07-20 02:09:12,487 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 53 [2020-07-20 02:09:12,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:09:12,488 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2020-07-20 02:09:12,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 02:09:12,488 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2020-07-20 02:09:12,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 02:09:12,489 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:09:12,489 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 02:09:12,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-20 02:09:12,703 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:09:12,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:09:12,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1064544018, now seen corresponding path program 4 times [2020-07-20 02:09:12,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:09:12,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687884831] [2020-07-20 02:09:12,705 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6b438b2f [2020-07-20 02:09:12,708 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:09:12,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626397908] [2020-07-20 02:09:12,709 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@341a9ea0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:09:12,791 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@341a9ea0 issued 4 check-sat command(s) [2020-07-20 02:09:12,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:09:12,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 02:09:12,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:09:13,013 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 02:09:13,654 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 02:09:14,493 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 02:09:26,730 WARN L193 SmtUtils]: Spent 8.71 s on a formula simplification that was a NOOP. DAG size: 33