/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/array-examples/standard_copy9_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:42:38,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:42:38,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:42:38,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:42:38,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:42:38,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:42:38,775 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:42:38,787 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:42:38,789 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:42:38,790 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:42:38,791 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:42:38,792 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:42:38,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:42:38,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:42:38,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:42:38,795 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:42:38,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:42:38,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:42:38,798 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:42:38,800 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:42:38,801 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:42:38,802 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:42:38,803 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:42:38,804 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:42:38,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:42:38,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:42:38,809 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:42:38,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:42:38,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:42:38,812 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:42:38,812 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:42:38,812 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:42:38,813 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:42:38,813 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:42:38,814 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:42:38,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:42:38,815 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 [2019-11-06 18:42:38,829 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:42:38,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:42:38,830 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:42:38,830 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:42:38,831 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:42:38,831 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:42:38,831 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:42:38,831 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:42:38,831 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:42:38,832 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:42:38,832 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:42:38,832 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:42:38,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:42:38,832 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:42:38,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:42:38,833 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:42:38,833 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:42:38,833 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:42:38,833 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:42:38,833 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:42:38,834 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:42:38,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:42:38,834 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:42:38,834 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:42:38,834 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:42:38,835 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:42:38,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:42:38,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:42:38,835 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:42:39,107 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:42:39,120 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:42:39,123 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:42:39,125 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:42:39,125 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:42:39,126 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy9_ground-2.i [2019-11-06 18:42:39,195 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/835dc0316/a342c183ec2c4577a0b8ae8ae7a3d349/FLAG0a9f8686d [2019-11-06 18:42:39,718 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:42:39,719 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy9_ground-2.i [2019-11-06 18:42:39,725 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/835dc0316/a342c183ec2c4577a0b8ae8ae7a3d349/FLAG0a9f8686d [2019-11-06 18:42:40,124 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/835dc0316/a342c183ec2c4577a0b8ae8ae7a3d349 [2019-11-06 18:42:40,132 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:42:40,134 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:42:40,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:42:40,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:42:40,139 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:42:40,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:42:40" (1/1) ... [2019-11-06 18:42:40,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eaa6467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:40, skipping insertion in model container [2019-11-06 18:42:40,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:42:40" (1/1) ... [2019-11-06 18:42:40,150 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:42:40,170 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:42:40,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:42:40,402 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:42:40,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:42:40,579 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:42:40,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:40 WrapperNode [2019-11-06 18:42:40,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:42:40,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:42:40,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:42:40,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:42:40,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:40" (1/1) ... [2019-11-06 18:42:40,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:40" (1/1) ... [2019-11-06 18:42:40,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:40" (1/1) ... [2019-11-06 18:42:40,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:40" (1/1) ... [2019-11-06 18:42:40,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:40" (1/1) ... [2019-11-06 18:42:40,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:40" (1/1) ... [2019-11-06 18:42:40,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:40" (1/1) ... [2019-11-06 18:42:40,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:42:40,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:42:40,635 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:42:40,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:42:40,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:40" (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 [2019-11-06 18:42:40,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:42:40,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:42:40,687 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:42:40,687 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:42:40,688 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:42:40,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:42:40,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:42:40,689 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:42:40,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:42:40,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:42:40,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:42:40,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:42:40,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:42:40,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:42:41,185 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:42:41,185 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-06 18:42:41,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:42:41 BoogieIcfgContainer [2019-11-06 18:42:41,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:42:41,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:42:41,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:42:41,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:42:41,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:42:40" (1/3) ... [2019-11-06 18:42:41,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ec84ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:42:41, skipping insertion in model container [2019-11-06 18:42:41,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:40" (2/3) ... [2019-11-06 18:42:41,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ec84ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:42:41, skipping insertion in model container [2019-11-06 18:42:41,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:42:41" (3/3) ... [2019-11-06 18:42:41,196 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-2.i [2019-11-06 18:42:41,207 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:42:41,216 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:42:41,229 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:42:41,254 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:42:41,254 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:42:41,255 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:42:41,255 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:42:41,255 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:42:41,255 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:42:41,255 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:42:41,255 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:42:41,272 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2019-11-06 18:42:41,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 18:42:41,279 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:41,280 INFO L410 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] [2019-11-06 18:42:41,282 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:41,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:41,286 INFO L82 PathProgramCache]: Analyzing trace with hash -178932642, now seen corresponding path program 1 times [2019-11-06 18:42:41,293 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:41,294 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970595354] [2019-11-06 18:42:41,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:41,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:41,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:41,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:42:41,501 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970595354] [2019-11-06 18:42:41,502 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:42:41,502 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:42:41,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576301566] [2019-11-06 18:42:41,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:42:41,509 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:41,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:42:41,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:42:41,527 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 3 states. [2019-11-06 18:42:41,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:41,738 INFO L93 Difference]: Finished difference Result 94 states and 137 transitions. [2019-11-06 18:42:41,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:42:41,740 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2019-11-06 18:42:41,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:41,753 INFO L225 Difference]: With dead ends: 94 [2019-11-06 18:42:41,753 INFO L226 Difference]: Without dead ends: 46 [2019-11-06 18:42:41,760 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:42:41,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-06 18:42:41,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-11-06 18:42:41,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-06 18:42:41,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2019-11-06 18:42:41,812 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 31 [2019-11-06 18:42:41,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:41,813 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2019-11-06 18:42:41,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:42:41,813 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2019-11-06 18:42:41,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 18:42:41,815 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:41,818 INFO L410 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] [2019-11-06 18:42:41,818 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:41,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:41,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1311438022, now seen corresponding path program 1 times [2019-11-06 18:42:41,819 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:41,820 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556733458] [2019-11-06 18:42:41,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:41,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:42:41,920 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556733458] [2019-11-06 18:42:41,921 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:42:41,921 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:42:41,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43259904] [2019-11-06 18:42:41,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:42:41,923 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:41,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:42:41,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:42:41,924 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 4 states. [2019-11-06 18:42:42,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:42,108 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2019-11-06 18:42:42,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:42:42,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2019-11-06 18:42:42,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:42,110 INFO L225 Difference]: With dead ends: 86 [2019-11-06 18:42:42,111 INFO L226 Difference]: Without dead ends: 48 [2019-11-06 18:42:42,113 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:42:42,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-06 18:42:42,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2019-11-06 18:42:42,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-06 18:42:42,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2019-11-06 18:42:42,129 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 31 [2019-11-06 18:42:42,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:42,130 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2019-11-06 18:42:42,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:42:42,130 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2019-11-06 18:42:42,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-06 18:42:42,132 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:42,132 INFO L410 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] [2019-11-06 18:42:42,132 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:42,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:42,133 INFO L82 PathProgramCache]: Analyzing trace with hash -953933084, now seen corresponding path program 1 times [2019-11-06 18:42:42,133 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:42,133 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262730732] [2019-11-06 18:42:42,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:42:42,228 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262730732] [2019-11-06 18:42:42,229 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:42:42,229 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:42:42,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727331754] [2019-11-06 18:42:42,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:42:42,230 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:42,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:42:42,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:42:42,231 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 4 states. [2019-11-06 18:42:42,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:42,474 INFO L93 Difference]: Finished difference Result 100 states and 127 transitions. [2019-11-06 18:42:42,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:42:42,475 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2019-11-06 18:42:42,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:42,476 INFO L225 Difference]: With dead ends: 100 [2019-11-06 18:42:42,477 INFO L226 Difference]: Without dead ends: 65 [2019-11-06 18:42:42,477 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:42:42,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-06 18:42:42,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2019-11-06 18:42:42,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-06 18:42:42,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2019-11-06 18:42:42,487 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 33 [2019-11-06 18:42:42,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:42,487 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2019-11-06 18:42:42,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:42:42,487 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2019-11-06 18:42:42,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 18:42:42,489 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:42,489 INFO L410 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, 1, 1, 1] [2019-11-06 18:42:42,489 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:42,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:42,490 INFO L82 PathProgramCache]: Analyzing trace with hash -753251022, now seen corresponding path program 1 times [2019-11-06 18:42:42,490 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:42,490 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371252178] [2019-11-06 18:42:42,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:42,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:42,642 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:42:42,642 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371252178] [2019-11-06 18:42:42,643 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619284668] [2019-11-06 18:42:42,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 18:42:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:42,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:42:42,749 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:42,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:42:42,786 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:42,787 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:42:42,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832206058] [2019-11-06 18:42:42,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:42:42,788 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:42,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:42:42,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:42:42,789 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 6 states. [2019-11-06 18:42:42,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:42,932 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2019-11-06 18:42:42,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:42:42,932 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2019-11-06 18:42:42,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:42,933 INFO L225 Difference]: With dead ends: 106 [2019-11-06 18:42:42,933 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 18:42:42,934 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:42:42,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 18:42:42,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2019-11-06 18:42:42,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-06 18:42:42,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2019-11-06 18:42:42,942 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 51 [2019-11-06 18:42:42,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:42,943 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2019-11-06 18:42:42,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:42:42,943 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2019-11-06 18:42:42,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-06 18:42:42,944 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:42,945 INFO L410 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] [2019-11-06 18:42:43,150 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:43,151 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:43,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:43,151 INFO L82 PathProgramCache]: Analyzing trace with hash 194854992, now seen corresponding path program 2 times [2019-11-06 18:42:43,151 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:43,152 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217757054] [2019-11-06 18:42:43,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:42:43,314 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217757054] [2019-11-06 18:42:43,314 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423700631] [2019-11-06 18:42:43,315 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-11-06 18:42:43,400 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:42:43,400 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:43,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:42:43,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:42:43,436 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:43,437 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-06 18:42:43,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724463282] [2019-11-06 18:42:43,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:42:43,438 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:43,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:42:43,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:42:43,439 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 8 states. [2019-11-06 18:42:43,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:43,732 INFO L93 Difference]: Finished difference Result 135 states and 164 transitions. [2019-11-06 18:42:43,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:42:43,735 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2019-11-06 18:42:43,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:43,736 INFO L225 Difference]: With dead ends: 135 [2019-11-06 18:42:43,736 INFO L226 Difference]: Without dead ends: 88 [2019-11-06 18:42:43,738 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:42:43,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-06 18:42:43,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2019-11-06 18:42:43,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-06 18:42:43,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2019-11-06 18:42:43,757 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 53 [2019-11-06 18:42:43,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:43,758 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2019-11-06 18:42:43,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:42:43,758 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2019-11-06 18:42:43,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-06 18:42:43,759 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:43,760 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:43,961 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:43,962 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:43,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:43,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1331683396, now seen corresponding path program 3 times [2019-11-06 18:42:43,963 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:43,964 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901601512] [2019-11-06 18:42:43,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:44,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:44,084 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 18:42:44,085 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901601512] [2019-11-06 18:42:44,085 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835680850] [2019-11-06 18:42:44,085 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-06 18:42:44,178 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:42:44,179 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:44,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:42:44,184 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-11-06 18:42:44,217 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:44,218 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-06 18:42:44,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629778734] [2019-11-06 18:42:44,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:42:44,219 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:44,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:42:44,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:42:44,220 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand 10 states. [2019-11-06 18:42:44,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:44,538 INFO L93 Difference]: Finished difference Result 173 states and 202 transitions. [2019-11-06 18:42:44,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:42:44,539 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2019-11-06 18:42:44,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:44,540 INFO L225 Difference]: With dead ends: 173 [2019-11-06 18:42:44,540 INFO L226 Difference]: Without dead ends: 108 [2019-11-06 18:42:44,541 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:42:44,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-11-06 18:42:44,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 98. [2019-11-06 18:42:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-06 18:42:44,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2019-11-06 18:42:44,555 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 73 [2019-11-06 18:42:44,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:44,556 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2019-11-06 18:42:44,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:42:44,557 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2019-11-06 18:42:44,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-06 18:42:44,559 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:44,559 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 18:42:44,760 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:44,761 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:44,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:44,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1977892568, now seen corresponding path program 4 times [2019-11-06 18:42:44,762 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:44,762 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149861407] [2019-11-06 18:42:44,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:44,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:44,905 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-06 18:42:44,905 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149861407] [2019-11-06 18:42:44,906 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980596861] [2019-11-06 18:42:44,906 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-11-06 18:42:44,988 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:42:44,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:44,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:42:44,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-06 18:42:45,035 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:45,036 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:42:45,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695208483] [2019-11-06 18:42:45,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:42:45,038 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:45,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:42:45,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:42:45,039 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 9 states. [2019-11-06 18:42:45,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:45,183 INFO L93 Difference]: Finished difference Result 184 states and 204 transitions. [2019-11-06 18:42:45,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:42:45,184 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2019-11-06 18:42:45,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:45,185 INFO L225 Difference]: With dead ends: 184 [2019-11-06 18:42:45,185 INFO L226 Difference]: Without dead ends: 101 [2019-11-06 18:42:45,186 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:42:45,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-06 18:42:45,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2019-11-06 18:42:45,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-06 18:42:45,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2019-11-06 18:42:45,196 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 93 [2019-11-06 18:42:45,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:45,197 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2019-11-06 18:42:45,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:42:45,197 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2019-11-06 18:42:45,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-06 18:42:45,198 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:45,199 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 18:42:45,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:45,402 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:45,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:45,402 INFO L82 PathProgramCache]: Analyzing trace with hash -102109498, now seen corresponding path program 5 times [2019-11-06 18:42:45,403 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:45,403 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806066084] [2019-11-06 18:42:45,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:45,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-06 18:42:45,576 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806066084] [2019-11-06 18:42:45,577 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561278951] [2019-11-06 18:42:45,577 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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