/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/array-fpi/eqn5f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:46:15,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:46:15,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:46:15,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 01:46:15,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 01:46:15,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 01:46:15,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 01:46:15,331 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 01:46:15,335 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 01:46:15,340 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 01:46:15,341 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 01:46:15,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 01:46:15,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:46:15,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:46:15,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:46:15,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:46:15,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:46:15,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:46:15,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:46:15,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:46:15,367 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:46:15,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:46:15,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:46:15,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:46:15,376 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 01:46:15,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:46:15,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:46:15,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:46:15,391 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 01:46:15,436 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:46:15,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:46:15,438 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:46:15,438 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:46:15,438 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:46:15,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:46:15,439 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:46:15,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:46:15,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:46:15,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:46:15,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:46:15,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:46:15,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:46:15,442 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:46:15,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:46:15,443 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:46:15,443 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:46:15,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:46:15,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:46:15,444 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:46:15,444 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:46:15,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:46:15,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:46:15,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:46:15,445 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:46:15,445 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:46:15,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:46:15,445 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:46:15,445 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:46:15,446 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 01:46:15,756 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:46:15,777 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:46:15,781 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:46:15,783 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:46:15,783 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:46:15,784 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/eqn5f.c [2020-07-20 01:46:15,880 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acfde37cc/5eb5118ef1a64ff087d5ec2a209de5aa/FLAGd36a8a399 [2020-07-20 01:46:16,378 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:46:16,378 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/eqn5f.c [2020-07-20 01:46:16,386 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acfde37cc/5eb5118ef1a64ff087d5ec2a209de5aa/FLAGd36a8a399 [2020-07-20 01:46:16,747 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acfde37cc/5eb5118ef1a64ff087d5ec2a209de5aa [2020-07-20 01:46:16,757 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:46:16,760 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:46:16,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:46:16,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:46:16,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:46:16,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:46:16" (1/1) ... [2020-07-20 01:46:16,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15b386b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:16, skipping insertion in model container [2020-07-20 01:46:16,770 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:46:16" (1/1) ... [2020-07-20 01:46:16,777 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:46:16,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:46:16,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:46:17,003 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:46:17,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:46:17,045 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:46:17,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:17 WrapperNode [2020-07-20 01:46:17,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:46:17,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:46:17,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:46:17,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:46:17,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:17" (1/1) ... [2020-07-20 01:46:17,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:17" (1/1) ... [2020-07-20 01:46:17,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:17" (1/1) ... [2020-07-20 01:46:17,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:17" (1/1) ... [2020-07-20 01:46:17,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:17" (1/1) ... [2020-07-20 01:46:17,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:17" (1/1) ... [2020-07-20 01:46:17,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:17" (1/1) ... [2020-07-20 01:46:17,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:46:17,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:46:17,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:46:17,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:46:17,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:46:17,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:46:17,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:46:17,266 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 01:46:17,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 01:46:17,266 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:46:17,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:46:17,266 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 01:46:17,266 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 01:46:17,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 01:46:17,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 01:46:17,267 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 01:46:17,267 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:46:17,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 01:46:17,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 01:46:17,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 01:46:17,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:46:17,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:46:17,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 01:46:17,592 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:46:17,592 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 01:46:17,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:46:17 BoogieIcfgContainer [2020-07-20 01:46:17,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:46:17,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:46:17,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:46:17,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:46:17,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:46:16" (1/3) ... [2020-07-20 01:46:17,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f12bb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:46:17, skipping insertion in model container [2020-07-20 01:46:17,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:17" (2/3) ... [2020-07-20 01:46:17,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f12bb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:46:17, skipping insertion in model container [2020-07-20 01:46:17,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:46:17" (3/3) ... [2020-07-20 01:46:17,606 INFO L109 eAbstractionObserver]: Analyzing ICFG eqn5f.c [2020-07-20 01:46:17,617 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:46:17,625 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:46:17,637 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:46:17,662 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:46:17,662 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:46:17,662 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:46:17,662 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:46:17,663 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:46:17,663 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:46:17,663 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:46:17,663 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:46:17,681 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-07-20 01:46:17,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 01:46:17,688 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:46:17,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:46:17,690 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:46:17,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:46:17,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1314760119, now seen corresponding path program 1 times [2020-07-20 01:46:17,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:46:17,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465347214] [2020-07-20 01:46:17,706 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6168f446 [2020-07-20 01:46:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:46:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:46:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:46:17,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:46:17,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465347214] [2020-07-20 01:46:17,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:46:17,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:46:17,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59003268] [2020-07-20 01:46:17,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:46:17,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:46:17,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:46:17,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:46:17,926 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-07-20 01:46:18,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:46:18,058 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-07-20 01:46:18,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:46:18,061 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 01:46:18,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:46:18,073 INFO L225 Difference]: With dead ends: 58 [2020-07-20 01:46:18,074 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 01:46:18,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:46:18,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 01:46:18,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-20 01:46:18,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 01:46:18,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-07-20 01:46:18,134 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-07-20 01:46:18,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:46:18,135 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-07-20 01:46:18,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:46:18,135 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-07-20 01:46:18,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 01:46:18,137 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:46:18,137 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:46:18,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:46:18,138 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:46:18,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:46:18,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1901566133, now seen corresponding path program 1 times [2020-07-20 01:46:18,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:46:18,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885505536] [2020-07-20 01:46:18,140 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6168f446 [2020-07-20 01:46:18,169 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:46:18,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8823261] [2020-07-20 01:46:18,171 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@399f4127 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:18,297 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@399f4127 issued 4 check-sat command(s) [2020-07-20 01:46:18,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:46:18,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 01:46:18,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:46:18,473 INFO L350 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2020-07-20 01:46:18,474 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2020-07-20 01:46:18,475 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:18,486 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:46:18,488 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-20 01:46:18,489 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:18 [2020-07-20 01:46:18,582 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:46:18,583 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-07-20 01:46:18,585 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 01:46:18,601 INFO L624 ElimStorePlain]: treesize reduction 12, result has 36.8 percent of original size [2020-07-20 01:46:18,602 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:46:18,603 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:7 [2020-07-20 01:46:18,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:46:18,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885505536] [2020-07-20 01:46:18,652 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 01:46:18,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8823261] [2020-07-20 01:46:18,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:46:18,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 01:46:18,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361999866] [2020-07-20 01:46:18,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 01:46:18,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:46:18,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 01:46:18,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 01:46:18,659 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 8 states. [2020-07-20 01:46:18,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:46:18,927 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-07-20 01:46:18,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 01:46:18,928 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-07-20 01:46:18,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:46:18,933 INFO L225 Difference]: With dead ends: 48 [2020-07-20 01:46:18,933 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 01:46:18,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-20 01:46:18,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 01:46:18,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2020-07-20 01:46:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 01:46:18,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-07-20 01:46:18,953 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 22 [2020-07-20 01:46:18,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:46:18,954 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-07-20 01:46:18,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 01:46:18,954 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-07-20 01:46:18,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 01:46:18,956 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:46:18,956 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:46:19,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 01:46:19,172 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:46:19,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:46:19,173 INFO L82 PathProgramCache]: Analyzing trace with hash -2104565367, now seen corresponding path program 1 times [2020-07-20 01:46:19,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:46:19,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584037343] [2020-07-20 01:46:19,174 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6168f446 [2020-07-20 01:46:19,202 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:46:19,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [196390888] [2020-07-20 01:46:19,203 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7cc5b286 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 01:46:19,282 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7cc5b286 issued 4 check-sat command(s) [2020-07-20 01:46:19,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:46:19,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 01:46:19,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:46:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:46:19,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584037343] [2020-07-20 01:46:19,317 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 01:46:19,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196390888] [2020-07-20 01:46:19,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:46:19,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 01:46:19,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316783496] [2020-07-20 01:46:19,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:46:19,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:46:19,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:46:19,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:46:19,321 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 5 states. [2020-07-20 01:46:19,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:46:19,431 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2020-07-20 01:46:19,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 01:46:19,432 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-07-20 01:46:19,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:46:19,437 INFO L225 Difference]: With dead ends: 71 [2020-07-20 01:46:19,437 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 01:46:19,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:46:19,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 01:46:19,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2020-07-20 01:46:19,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 01:46:19,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-07-20 01:46:19,450 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 24 [2020-07-20 01:46:19,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:46:19,450 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-07-20 01:46:19,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:46:19,451 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-07-20 01:46:19,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 01:46:19,452 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:46:19,452 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:46:19,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:19,667 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:46:19,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:46:19,668 INFO L82 PathProgramCache]: Analyzing trace with hash -2011180599, now seen corresponding path program 1 times [2020-07-20 01:46:19,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:46:19,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739905539] [2020-07-20 01:46:19,669 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6168f446 [2020-07-20 01:46:19,695 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:46:19,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352844383] [2020-07-20 01:46:19,696 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@17716cbf No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:19,769 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@17716cbf issued 4 check-sat command(s) [2020-07-20 01:46:19,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:46:19,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 01:46:19,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:46:19,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:46:19,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739905539] [2020-07-20 01:46:19,808 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 01:46:19,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352844383] [2020-07-20 01:46:19,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:46:19,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-07-20 01:46:19,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036642049] [2020-07-20 01:46:19,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:46:19,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:46:19,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:46:19,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:46:19,811 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 5 states. [2020-07-20 01:46:19,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:46:19,936 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2020-07-20 01:46:19,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 01:46:19,937 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-07-20 01:46:19,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:46:19,938 INFO L225 Difference]: With dead ends: 66 [2020-07-20 01:46:19,939 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 01:46:19,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:46:19,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 01:46:19,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2020-07-20 01:46:19,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 01:46:19,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-07-20 01:46:19,951 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 24 [2020-07-20 01:46:19,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:46:19,951 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-07-20 01:46:19,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:46:19,952 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-07-20 01:46:19,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 01:46:19,953 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:46:19,953 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:46:20,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:20,155 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:46:20,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:46:20,156 INFO L82 PathProgramCache]: Analyzing trace with hash -69884793, now seen corresponding path program 1 times [2020-07-20 01:46:20,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:46:20,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378496318] [2020-07-20 01:46:20,158 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6168f446 [2020-07-20 01:46:20,178 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:46:20,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343794596] [2020-07-20 01:46:20,179 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@12a9d0b4 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 01:46:20,290 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@12a9d0b4 issued 4 check-sat command(s) [2020-07-20 01:46:20,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:46:20,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 01:46:20,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:46:20,333 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-07-20 01:46:20,335 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:20,351 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:46:20,361 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-07-20 01:46:20,362 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:20,371 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:46:20,372 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:46:20,373 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:22 [2020-07-20 01:46:20,478 INFO L350 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2020-07-20 01:46:20,480 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 72 [2020-07-20 01:46:20,485 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:20,529 INFO L624 ElimStorePlain]: treesize reduction 32, result has 59.5 percent of original size [2020-07-20 01:46:20,533 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:46:20,533 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:47 [2020-07-20 01:46:20,745 INFO L350 Elim1Store]: treesize reduction 64, result has 53.6 percent of original size [2020-07-20 01:46:20,747 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 126 [2020-07-20 01:46:20,751 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:20,839 INFO L624 ElimStorePlain]: treesize reduction 92, result has 45.2 percent of original size [2020-07-20 01:46:20,845 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-20 01:46:20,845 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:76 [2020-07-20 01:46:21,102 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2020-07-20 01:46:21,108 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:46:21,365 INFO L350 Elim1Store]: treesize reduction 28, result has 78.3 percent of original size [2020-07-20 01:46:21,366 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 67 treesize of output 118 [2020-07-20 01:46:21,372 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-07-20 01:46:21,373 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:46:21,375 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-07-20 01:46:21,376 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:46:21,377 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-20 01:46:21,378 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:46:21,380 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2020-07-20 01:46:21,380 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:46:21,382 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-07-20 01:46:21,383 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:46:21,385 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-07-20 01:46:21,385 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:46:21,387 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-20 01:46:21,387 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:46:21,389 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 2, 3, 1] term [2020-07-20 01:46:21,390 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:46:21,391 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 3, 1] term [2020-07-20 01:46:21,392 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:46:21,393 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-20 01:46:21,394 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:46:21,398 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:21,482 INFO L624 ElimStorePlain]: treesize reduction 390, result has 4.2 percent of original size [2020-07-20 01:46:21,485 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:46:21,485 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:80, output treesize:7 [2020-07-20 01:46:21,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:46:21,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378496318] [2020-07-20 01:46:21,566 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 01:46:21,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343794596] [2020-07-20 01:46:21,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:46:21,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-20 01:46:21,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854194044] [2020-07-20 01:46:21,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 01:46:21,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:46:21,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 01:46:21,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-07-20 01:46:21,570 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 13 states. [2020-07-20 01:46:22,043 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2020-07-20 01:46:22,286 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-07-20 01:46:22,800 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-07-20 01:46:23,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:46:23,668 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2020-07-20 01:46:23,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 01:46:23,669 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-07-20 01:46:23,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:46:23,671 INFO L225 Difference]: With dead ends: 80 [2020-07-20 01:46:23,671 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 01:46:23,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-07-20 01:46:23,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 01:46:23,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 48. [2020-07-20 01:46:23,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 01:46:23,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-07-20 01:46:23,690 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 26 [2020-07-20 01:46:23,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:46:23,693 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-07-20 01:46:23,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 01:46:23,694 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-07-20 01:46:23,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 01:46:23,695 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:46:23,695 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:46:23,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:23,897 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:46:23,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:46:23,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1048027141, now seen corresponding path program 2 times [2020-07-20 01:46:23,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:46:23,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927559350] [2020-07-20 01:46:23,899 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6168f446 [2020-07-20 01:46:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:46:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:46:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:46:24,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:46:24,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927559350] [2020-07-20 01:46:24,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400906089] [2020-07-20 01:46:24,090 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@189c910 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:24,165 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@189c910 issued 4 check-sat command(s) [2020-07-20 01:46:24,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:46:24,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 01:46:24,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:46:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:46:24,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:46:24,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-07-20 01:46:24,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67605689] [2020-07-20 01:46:24,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 01:46:24,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:46:24,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 01:46:24,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-20 01:46:24,215 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 10 states. [2020-07-20 01:46:24,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:46:24,599 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2020-07-20 01:46:24,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 01:46:24,600 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-07-20 01:46:24,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:46:24,602 INFO L225 Difference]: With dead ends: 88 [2020-07-20 01:46:24,602 INFO L226 Difference]: Without dead ends: 77 [2020-07-20 01:46:24,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-07-20 01:46:24,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-20 01:46:24,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 50. [2020-07-20 01:46:24,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 01:46:24,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2020-07-20 01:46:24,644 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 28 [2020-07-20 01:46:24,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:46:24,644 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2020-07-20 01:46:24,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 01:46:24,645 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2020-07-20 01:46:24,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 01:46:24,646 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:46:24,646 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:46:24,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 01:46:24,862 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:46:24,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:46:24,862 INFO L82 PathProgramCache]: Analyzing trace with hash 913238305, now seen corresponding path program 1 times [2020-07-20 01:46:24,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:46:24,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598584581] [2020-07-20 01:46:24,864 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6168f446 [2020-07-20 01:46:24,877 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:46:24,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324198444] [2020-07-20 01:46:24,877 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31eada86 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 01:46:24,922 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31eada86 issued 3 check-sat command(s) [2020-07-20 01:46:24,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:46:24,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 01:46:24,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:46:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:46:24,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598584581] [2020-07-20 01:46:24,960 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 01:46:24,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324198444] [2020-07-20 01:46:24,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:46:24,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 01:46:24,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820504649] [2020-07-20 01:46:24,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 01:46:24,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:46:24,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 01:46:24,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:46:24,963 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 6 states. [2020-07-20 01:46:25,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:46:25,056 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2020-07-20 01:46:25,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 01:46:25,056 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-07-20 01:46:25,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:46:25,057 INFO L225 Difference]: With dead ends: 74 [2020-07-20 01:46:25,058 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 01:46:25,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:46:25,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 01:46:25,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-07-20 01:46:25,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 01:46:25,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-07-20 01:46:25,070 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 30 [2020-07-20 01:46:25,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:46:25,070 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-07-20 01:46:25,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 01:46:25,070 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-07-20 01:46:25,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 01:46:25,071 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:46:25,072 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:46:25,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:25,285 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:46:25,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:46:25,286 INFO L82 PathProgramCache]: Analyzing trace with hash -2074868861, now seen corresponding path program 3 times [2020-07-20 01:46:25,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:46:25,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073521678] [2020-07-20 01:46:25,287 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6168f446 [2020-07-20 01:46:25,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:46:25,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:46:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:46:25,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:46:25,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073521678] [2020-07-20 01:46:25,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161019600] [2020-07-20 01:46:25,406 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7ed3d316 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:25,522 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7ed3d316 issued 4 check-sat command(s) [2020-07-20 01:46:25,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:46:25,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 01:46:25,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:46:25,590 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:46:25,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:46:25,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2020-07-20 01:46:25,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807025378] [2020-07-20 01:46:25,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 01:46:25,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:46:25,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 01:46:25,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-07-20 01:46:25,593 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 13 states. [2020-07-20 01:46:25,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:46:25,876 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-07-20 01:46:25,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 01:46:25,877 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-07-20 01:46:25,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:46:25,879 INFO L225 Difference]: With dead ends: 88 [2020-07-20 01:46:25,879 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 01:46:25,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-07-20 01:46:25,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 01:46:25,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-07-20 01:46:25,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 01:46:25,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-07-20 01:46:25,889 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 30 [2020-07-20 01:46:25,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:46:25,890 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-07-20 01:46:25,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 01:46:25,890 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-07-20 01:46:25,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 01:46:25,891 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:46:25,891 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:46:26,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:26,106 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:46:26,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:46:26,107 INFO L82 PathProgramCache]: Analyzing trace with hash 2071122883, now seen corresponding path program 4 times [2020-07-20 01:46:26,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:46:26,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600249886] [2020-07-20 01:46:26,108 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6168f446 [2020-07-20 01:46:26,127 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:46:26,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359852250] [2020-07-20 01:46:26,128 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7dcb425c 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 01:46:26,227 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7dcb425c issued 4 check-sat command(s) [2020-07-20 01:46:26,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:46:26,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-20 01:46:26,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:46:26,248 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-07-20 01:46:26,249 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:26,262 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:46:26,269 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-07-20 01:46:26,269 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:26,281 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:46:26,282 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:46:26,282 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:28 [2020-07-20 01:46:26,312 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 01:46:26,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:26,315 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2020-07-20 01:46:26,317 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:26,339 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:46:26,340 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:46:26,340 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:55 [2020-07-20 01:46:26,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:26,408 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 01:46:26,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:26,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:26,414 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 51 [2020-07-20 01:46:26,418 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:26,456 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:46:26,457 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:46:26,457 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:72, output treesize:74 [2020-07-20 01:46:26,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:26,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:26,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:26,701 INFO L350 Elim1Store]: treesize reduction 54, result has 62.2 percent of original size [2020-07-20 01:46:26,703 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 155 [2020-07-20 01:46:26,705 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:26,812 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-07-20 01:46:26,816 INFO L624 ElimStorePlain]: treesize reduction 128, result has 44.8 percent of original size [2020-07-20 01:46:26,816 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:46:26,817 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:100, output treesize:104 [2020-07-20 01:46:26,963 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-20 01:46:26,965 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-20 01:46:26,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:27,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:27,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:27,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:27,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:27,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:27,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:27,114 INFO L244 Elim1Store]: Index analysis took 128 ms [2020-07-20 01:46:27,155 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:46:27,157 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 197 [2020-07-20 01:46:27,161 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:27,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:27,173 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 01:46:27,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:27,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:27,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:27,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:27,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:27,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:27,185 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 92 [2020-07-20 01:46:27,188 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:27,465 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2020-07-20 01:46:27,466 INFO L624 ElimStorePlain]: treesize reduction 159, result has 61.6 percent of original size [2020-07-20 01:46:27,469 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2020-07-20 01:46:27,469 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:243, output treesize:255 [2020-07-20 01:46:27,613 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:46:27,615 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:46:28,044 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 94 [2020-07-20 01:46:28,049 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-20 01:46:28,192 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-07-20 01:46:28,473 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 01:46:28,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:28,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:28,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:28,481 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 01:46:28,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:28,484 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 01:46:28,488 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 01:46:28,546 INFO L350 Elim1Store]: treesize reduction 51, result has 42.0 percent of original size [2020-07-20 01:46:28,547 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 113 treesize of output 67 [2020-07-20 01:46:28,550 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:28,561 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:46:28,562 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:46:28,563 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:122, output treesize:7 [2020-07-20 01:46:28,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:46:28,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600249886] [2020-07-20 01:46:28,742 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 01:46:28,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359852250] [2020-07-20 01:46:28,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:46:28,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-20 01:46:28,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617005607] [2020-07-20 01:46:28,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 01:46:28,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:46:28,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 01:46:28,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-07-20 01:46:28,745 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 17 states. [2020-07-20 01:46:31,675 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-07-20 01:46:31,907 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-07-20 01:46:32,378 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 76 [2020-07-20 01:46:33,086 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 97 [2020-07-20 01:46:33,637 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 73 [2020-07-20 01:46:34,053 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 68 [2020-07-20 01:46:35,506 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 119 DAG size of output: 80 [2020-07-20 01:46:35,987 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 70 [2020-07-20 01:46:36,641 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 77 [2020-07-20 01:46:37,101 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 55 [2020-07-20 01:46:37,494 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 57 [2020-07-20 01:46:38,114 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 71 [2020-07-20 01:46:39,228 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-07-20 01:46:39,868 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 88 [2020-07-20 01:46:39,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:46:39,940 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2020-07-20 01:46:39,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 01:46:39,945 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2020-07-20 01:46:39,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:46:39,947 INFO L225 Difference]: With dead ends: 98 [2020-07-20 01:46:39,947 INFO L226 Difference]: Without dead ends: 96 [2020-07-20 01:46:39,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 01:46:39,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-20 01:46:39,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 58. [2020-07-20 01:46:39,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-20 01:46:39,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2020-07-20 01:46:39,961 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 30 [2020-07-20 01:46:39,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:46:39,961 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2020-07-20 01:46:39,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 01:46:39,961 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2020-07-20 01:46:39,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-20 01:46:39,962 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:46:39,963 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:46:40,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-20 01:46:40,164 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:46:40,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:46:40,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1569644609, now seen corresponding path program 5 times [2020-07-20 01:46:40,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:46:40,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952798088] [2020-07-20 01:46:40,166 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6168f446 [2020-07-20 01:46:40,187 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:46:40,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678356772] [2020-07-20 01:46:40,190 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@581a4f7 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:40,299 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@581a4f7 issued 4 check-sat command(s) [2020-07-20 01:46:40,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:46:40,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 01:46:40,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:46:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:46:40,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952798088] [2020-07-20 01:46:40,398 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 01:46:40,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678356772] [2020-07-20 01:46:40,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:46:40,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 01:46:40,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377096872] [2020-07-20 01:46:40,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 01:46:40,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:46:40,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 01:46:40,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:46:40,400 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 9 states. [2020-07-20 01:46:40,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:46:40,873 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2020-07-20 01:46:40,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 01:46:40,875 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-07-20 01:46:40,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:46:40,877 INFO L225 Difference]: With dead ends: 102 [2020-07-20 01:46:40,877 INFO L226 Difference]: Without dead ends: 91 [2020-07-20 01:46:40,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 01:46:40,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-07-20 01:46:40,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 60. [2020-07-20 01:46:40,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 01:46:40,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-07-20 01:46:40,890 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 32 [2020-07-20 01:46:40,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:46:40,891 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-07-20 01:46:40,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 01:46:40,891 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-07-20 01:46:40,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 01:46:40,892 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:46:40,893 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:46:41,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:41,109 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:46:41,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:46:41,109 INFO L82 PathProgramCache]: Analyzing trace with hash 890841693, now seen corresponding path program 1 times [2020-07-20 01:46:41,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:46:41,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054304817] [2020-07-20 01:46:41,110 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6168f446 [2020-07-20 01:46:41,124 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:46:41,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926175016] [2020-07-20 01:46:41,127 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@17396d61 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 01:46:41,225 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@17396d61 issued 4 check-sat command(s) [2020-07-20 01:46:41,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 01:46:41,226 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 01:46:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 01:46:41,247 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 01:46:41,277 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 01:46:41,278 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 01:46:41,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:41,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:46:41 BoogieIcfgContainer [2020-07-20 01:46:41,533 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 01:46:41,536 INFO L168 Benchmark]: Toolchain (without parser) took 24777.07 ms. Allocated memory was 145.2 MB in the beginning and 308.3 MB in the end (delta: 163.1 MB). Free memory was 101.8 MB in the beginning and 179.1 MB in the end (delta: -77.4 MB). Peak memory consumption was 85.7 MB. Max. memory is 7.1 GB. [2020-07-20 01:46:41,537 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.2 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 01:46:41,538 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.45 ms. Allocated memory is still 145.2 MB. Free memory was 101.3 MB in the beginning and 90.6 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-07-20 01:46:41,538 INFO L168 Benchmark]: Boogie Preprocessor took 158.12 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 90.6 MB in the beginning and 180.4 MB in the end (delta: -89.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-20 01:46:41,539 INFO L168 Benchmark]: RCFGBuilder took 391.28 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 163.0 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. [2020-07-20 01:46:41,539 INFO L168 Benchmark]: TraceAbstraction took 23934.49 ms. Allocated memory was 202.4 MB in the beginning and 308.3 MB in the end (delta: 105.9 MB). Free memory was 163.0 MB in the beginning and 179.1 MB in the end (delta: -16.1 MB). Peak memory consumption was 89.8 MB. Max. memory is 7.1 GB. [2020-07-20 01:46:41,548 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 145.2 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 285.45 ms. Allocated memory is still 145.2 MB. Free memory was 101.3 MB in the beginning and 90.6 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 158.12 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 90.6 MB in the beginning and 180.4 MB in the end (delta: -89.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 391.28 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 163.0 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 23934.49 ms. Allocated memory was 202.4 MB in the beginning and 308.3 MB in the end (delta: 105.9 MB). Free memory was 163.0 MB in the beginning and 179.1 MB in the end (delta: -16.1 MB). Peak memory consumption was 89.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=3, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L29] a[0] = 1 [L30] b[0] = 1 [L31] i=1 VAL [\old(N)=0, a={-1:0}, b={-2:0}, i=1, malloc(sizeof(long long)*N)={-2:0}, malloc(sizeof(long long)*N)={-1:0}, N=2] [L31] COND TRUE i