/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:44:30,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:44:30,623 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:44:30,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:44:30,650 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:44:30,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:44:30,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:44:30,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:44:30,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:44:30,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:44:30,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:44:30,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:44:30,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:44:30,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:44:30,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:44:30,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:44:30,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:44:30,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:44:30,668 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:44:30,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:44:30,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:44:30,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:44:30,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:44:30,676 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:44:30,678 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:44:30,682 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 13:44:30,683 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 13:44:30,684 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 13:44:30,685 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 13:44:30,686 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 13:44:30,686 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 13:44:30,687 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 13:44:30,687 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 13:44:30,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:44:30,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:44:30,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:44:30,691 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:44:30,728 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:44:30,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:44:30,731 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:44:30,732 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:44:30,732 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:44:30,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:44:30,732 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:44:30,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:44:30,733 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:44:30,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:44:30,733 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:44:30,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:44:30,734 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:44:30,735 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:44:30,736 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:44:30,736 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:44:30,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:44:30,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:44:30,737 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:44:30,737 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:44:30,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:44:30,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:44:30,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:44:30,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:44:30,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:44:30,738 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:44:30,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:44:30,738 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:44:30,739 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:44:30,739 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:44:31,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:44:31,245 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:44:31,249 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:44:31,251 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:44:31,252 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:44:31,253 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2020-09-04 13:44:31,347 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/41a13fc42/41b46cf18cdf4df79fee59233a4b5909/FLAGd542bcaeb [2020-09-04 13:44:31,945 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:44:31,946 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2020-09-04 13:44:31,959 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/41a13fc42/41b46cf18cdf4df79fee59233a4b5909/FLAGd542bcaeb [2020-09-04 13:44:32,253 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/41a13fc42/41b46cf18cdf4df79fee59233a4b5909 [2020-09-04 13:44:32,271 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:44:32,274 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:44:32,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:44:32,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:44:32,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:44:32,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:44:32" (1/1) ... [2020-09-04 13:44:32,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d3c0a05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:32, skipping insertion in model container [2020-09-04 13:44:32,291 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:44:32" (1/1) ... [2020-09-04 13:44:32,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:44:32,366 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:44:32,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:44:32,852 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:44:32,960 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:44:32,988 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:44:32,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:32 WrapperNode [2020-09-04 13:44:32,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:44:32,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:44:32,990 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:44:32,990 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:44:33,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:32" (1/1) ... [2020-09-04 13:44:33,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:32" (1/1) ... [2020-09-04 13:44:33,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:32" (1/1) ... [2020-09-04 13:44:33,028 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:32" (1/1) ... [2020-09-04 13:44:33,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:32" (1/1) ... [2020-09-04 13:44:33,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:32" (1/1) ... [2020-09-04 13:44:33,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:32" (1/1) ... [2020-09-04 13:44:33,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:44:33,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:44:33,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:44:33,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:44:33,101 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:44:33,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:44:33,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:44:33,220 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:44:33,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:44:33,221 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-09-04 13:44:33,221 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-09-04 13:44:33,222 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:44:33,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 13:44:33,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 13:44:33,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 13:44:33,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-04 13:44:33,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-04 13:44:33,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 13:44:33,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:44:33,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:44:33,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-04 13:44:33,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 13:44:36,376 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:44:36,376 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 13:44:36,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:44:36 BoogieIcfgContainer [2020-09-04 13:44:36,382 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:44:36,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:44:36,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:44:36,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:44:36,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:44:32" (1/3) ... [2020-09-04 13:44:36,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a5f668f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:44:36, skipping insertion in model container [2020-09-04 13:44:36,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:32" (2/3) ... [2020-09-04 13:44:36,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a5f668f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:44:36, skipping insertion in model container [2020-09-04 13:44:36,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:44:36" (3/3) ... [2020-09-04 13:44:36,392 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lhb-reducer.c [2020-09-04 13:44:36,405 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:44:36,416 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:44:36,440 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:44:36,473 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:44:36,474 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:44:36,474 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:44:36,474 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:44:36,474 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:44:36,474 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:44:36,474 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:44:36,475 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:44:36,500 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-09-04 13:44:36,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-04 13:44:36,510 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:44:36,511 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:44:36,511 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:44:36,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:44:36,519 INFO L82 PathProgramCache]: Analyzing trace with hash 377540282, now seen corresponding path program 1 times [2020-09-04 13:44:36,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:44:36,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892386928] [2020-09-04 13:44:36,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:44:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:37,561 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-09-04 13:44:37,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:44:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:44:37,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892386928] [2020-09-04 13:44:37,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:44:37,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-09-04 13:44:37,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386484319] [2020-09-04 13:44:37,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 13:44:37,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:44:37,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 13:44:37,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:44:37,641 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 14 states. [2020-09-04 13:44:37,967 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-09-04 13:44:59,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:44:59,122 INFO L93 Difference]: Finished difference Result 92 states and 136 transitions. [2020-09-04 13:44:59,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 13:44:59,125 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-09-04 13:44:59,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:44:59,144 INFO L225 Difference]: With dead ends: 92 [2020-09-04 13:44:59,144 INFO L226 Difference]: Without dead ends: 57 [2020-09-04 13:44:59,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-09-04 13:44:59,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-04 13:44:59,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-09-04 13:44:59,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-04 13:44:59,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-09-04 13:44:59,211 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 48 [2020-09-04 13:44:59,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:44:59,212 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-09-04 13:44:59,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 13:44:59,212 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-09-04 13:44:59,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-04 13:44:59,214 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:44:59,214 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, 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] [2020-09-04 13:44:59,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:44:59,215 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:44:59,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:44:59,215 INFO L82 PathProgramCache]: Analyzing trace with hash -849330057, now seen corresponding path program 1 times [2020-09-04 13:44:59,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:44:59,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737306610] [2020-09-04 13:44:59,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:44:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:59,754 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-09-04 13:44:59,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:44:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:44:59,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737306610] [2020-09-04 13:44:59,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716837917] [2020-09-04 13:44:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:45:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:45:00,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-04 13:45:00,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:45:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:45:00,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:45:00,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2020-09-04 13:45:00,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945515356] [2020-09-04 13:45:00,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 13:45:00,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:45:00,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 13:45:00,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-04 13:45:00,182 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 16 states. [2020-09-04 13:45:00,474 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-09-04 13:45:25,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:45:25,330 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-09-04 13:45:25,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 13:45:25,333 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-09-04 13:45:25,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:45:25,335 INFO L225 Difference]: With dead ends: 65 [2020-09-04 13:45:25,338 INFO L226 Difference]: Without dead ends: 62 [2020-09-04 13:45:25,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2020-09-04 13:45:25,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-04 13:45:25,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-09-04 13:45:25,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-04 13:45:25,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-09-04 13:45:25,354 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 53 [2020-09-04 13:45:25,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:45:25,355 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-09-04 13:45:25,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 13:45:25,355 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-09-04 13:45:25,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-04 13:45:25,357 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:45:25,358 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:45:25,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-09-04 13:45:25,560 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:45:25,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:45:25,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1610392358, now seen corresponding path program 2 times [2020-09-04 13:45:25,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:45:25,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544879763] [2020-09-04 13:45:25,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:45:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:45:26,155 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-09-04 13:45:26,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:45:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:45:26,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:45:26,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544879763] [2020-09-04 13:45:26,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002620327] [2020-09-04 13:45:26,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:45:48,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:45:48,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:45:48,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-04 13:45:48,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:45:48,511 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:45:48,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:45:48,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2020-09-04 13:45:48,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063087673] [2020-09-04 13:45:48,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 13:45:48,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:45:48,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 13:45:48,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-09-04 13:45:48,514 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 17 states. [2020-09-04 13:45:48,806 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-09-04 13:46:15,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:46:15,920 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-09-04 13:46:15,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 13:46:15,921 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2020-09-04 13:46:15,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:46:15,924 INFO L225 Difference]: With dead ends: 70 [2020-09-04 13:46:15,924 INFO L226 Difference]: Without dead ends: 67 [2020-09-04 13:46:15,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2020-09-04 13:46:15,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-04 13:46:15,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-09-04 13:46:15,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-04 13:46:15,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-09-04 13:46:15,934 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 58 [2020-09-04 13:46:15,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:46:15,935 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-09-04 13:46:15,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 13:46:15,935 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-09-04 13:46:15,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-04 13:46:15,937 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:46:15,938 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:46:16,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:46:16,152 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:46:16,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:46:16,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1809942103, now seen corresponding path program 3 times [2020-09-04 13:46:16,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:46:16,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052965398] [2020-09-04 13:46:16,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:46:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:46:16,767 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-09-04 13:46:16,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:46:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:46:16,802 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:46:16,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052965398] [2020-09-04 13:46:16,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96900983] [2020-09-04 13:46:16,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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