/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/bitvector/gcd_4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 11:44:01,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 11:44:01,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 11:44:01,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 11:44:01,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 11:44:01,872 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 11:44:01,874 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 11:44:01,875 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 11:44:01,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 11:44:01,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 11:44:01,879 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 11:44:01,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 11:44:01,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 11:44:01,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 11:44:01,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 11:44:01,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 11:44:01,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 11:44:01,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 11:44:01,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 11:44:01,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 11:44:01,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 11:44:01,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 11:44:01,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 11:44:01,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 11:44:01,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 11:44:01,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 11:44:01,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 11:44:01,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 11:44:01,905 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-17 11:44:01,927 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 11:44:01,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 11:44:01,930 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 11:44:01,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 11:44:01,930 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 11:44:01,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 11:44:01,930 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 11:44:01,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 11:44:01,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 11:44:01,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 11:44:01,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 11:44:01,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 11:44:01,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 11:44:01,933 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 11:44:01,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 11:44:01,933 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 11:44:01,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 11:44:01,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 11:44:01,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 11:44:01,934 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 11:44:01,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 11:44:01,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 11:44:01,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 11:44:01,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 11:44:01,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 11:44:01,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 11:44:01,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 11:44:01,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 11:44:01,936 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 11:44:01,936 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 11:44:02,195 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 11:44:02,211 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 11:44:02,214 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 11:44:02,215 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 11:44:02,215 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 11:44:02,216 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/gcd_4.c [2020-07-17 11:44:02,289 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4fb4d944/8164db69d58f4ad0ad70346e8c3f3590/FLAG66c301e8a [2020-07-17 11:44:02,718 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 11:44:02,719 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/gcd_4.c [2020-07-17 11:44:02,725 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4fb4d944/8164db69d58f4ad0ad70346e8c3f3590/FLAG66c301e8a [2020-07-17 11:44:03,115 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4fb4d944/8164db69d58f4ad0ad70346e8c3f3590 [2020-07-17 11:44:03,124 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 11:44:03,127 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 11:44:03,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 11:44:03,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 11:44:03,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 11:44:03,133 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 11:44:03" (1/1) ... [2020-07-17 11:44:03,136 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13d4feeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:03, skipping insertion in model container [2020-07-17 11:44:03,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 11:44:03" (1/1) ... [2020-07-17 11:44:03,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 11:44:03,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 11:44:03,352 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 11:44:03,357 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 11:44:03,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 11:44:03,386 INFO L208 MainTranslator]: Completed translation [2020-07-17 11:44:03,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:03 WrapperNode [2020-07-17 11:44:03,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 11:44:03,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 11:44:03,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 11:44:03,388 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 11:44:03,399 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:03" (1/1) ... [2020-07-17 11:44:03,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:03" (1/1) ... [2020-07-17 11:44:03,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:03" (1/1) ... [2020-07-17 11:44:03,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:03" (1/1) ... [2020-07-17 11:44:03,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:03" (1/1) ... [2020-07-17 11:44:03,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:03" (1/1) ... [2020-07-17 11:44:03,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:03" (1/1) ... [2020-07-17 11:44:03,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 11:44:03,493 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 11:44:03,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 11:44:03,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 11:44:03,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 11:44:03,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 11:44:03,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 11:44:03,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 11:44:03,558 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd_test [2020-07-17 11:44:03,558 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 11:44:03,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 11:44:03,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 11:44:03,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 11:44:03,559 INFO L130 BoogieDeclarations]: Found specification of procedure gcd_test [2020-07-17 11:44:03,559 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 11:44:03,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 11:44:03,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 11:44:03,751 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 11:44:03,751 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-17 11:44:03,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 11:44:03 BoogieIcfgContainer [2020-07-17 11:44:03,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 11:44:03,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 11:44:03,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 11:44:03,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 11:44:03,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 11:44:03" (1/3) ... [2020-07-17 11:44:03,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7321b2a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 11:44:03, skipping insertion in model container [2020-07-17 11:44:03,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:03" (2/3) ... [2020-07-17 11:44:03,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7321b2a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 11:44:03, skipping insertion in model container [2020-07-17 11:44:03,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 11:44:03" (3/3) ... [2020-07-17 11:44:03,766 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd_4.c [2020-07-17 11:44:03,786 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 11:44:03,793 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 11:44:03,809 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 11:44:03,836 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 11:44:03,837 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 11:44:03,837 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 11:44:03,837 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 11:44:03,837 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 11:44:03,838 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 11:44:03,838 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 11:44:03,838 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 11:44:03,860 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-07-17 11:44:03,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-17 11:44:03,867 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:03,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:03,869 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:03,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:03,875 INFO L82 PathProgramCache]: Analyzing trace with hash 876608673, now seen corresponding path program 1 times [2020-07-17 11:44:03,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:03,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733473729] [2020-07-17 11:44:03,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:04,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:44:04,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733473729] [2020-07-17 11:44:04,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 11:44:04,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 11:44:04,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999902034] [2020-07-17 11:44:04,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 11:44:04,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:04,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 11:44:04,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 11:44:04,146 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 4 states. [2020-07-17 11:44:04,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:04,209 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2020-07-17 11:44:04,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 11:44:04,211 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-07-17 11:44:04,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:04,221 INFO L225 Difference]: With dead ends: 55 [2020-07-17 11:44:04,221 INFO L226 Difference]: Without dead ends: 32 [2020-07-17 11:44:04,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 11:44:04,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-17 11:44:04,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-07-17 11:44:04,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-17 11:44:04,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-07-17 11:44:04,265 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 17 [2020-07-17 11:44:04,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:04,266 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-07-17 11:44:04,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 11:44:04,266 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-07-17 11:44:04,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-17 11:44:04,268 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:04,268 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:04,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 11:44:04,269 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:04,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:04,270 INFO L82 PathProgramCache]: Analyzing trace with hash 483581663, now seen corresponding path program 1 times [2020-07-17 11:44:04,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:04,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357603472] [2020-07-17 11:44:04,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:04,284 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 11:44:04,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [171199681] [2020-07-17 11:44:04,285 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 [2020-07-17 11:44:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:04,325 INFO L264 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-17 11:44:04,332 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:04,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:44:04,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357603472] [2020-07-17 11:44:04,406 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 11:44:04,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171199681] [2020-07-17 11:44:04,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 11:44:04,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 11:44:04,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269207904] [2020-07-17 11:44:04,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 11:44:04,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:04,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 11:44:04,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 11:44:04,414 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 5 states. [2020-07-17 11:44:04,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:04,488 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-07-17 11:44:04,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 11:44:04,489 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-17 11:44:04,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:04,490 INFO L225 Difference]: With dead ends: 47 [2020-07-17 11:44:04,490 INFO L226 Difference]: Without dead ends: 30 [2020-07-17 11:44:04,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 11:44:04,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-17 11:44:04,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2020-07-17 11:44:04,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-17 11:44:04,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-07-17 11:44:04,499 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 17 [2020-07-17 11:44:04,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:04,500 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-07-17 11:44:04,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 11:44:04,500 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-07-17 11:44:04,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-17 11:44:04,501 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:04,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:04,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-17 11:44:04,709 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:04,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:04,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1158269966, now seen corresponding path program 1 times [2020-07-17 11:44:04,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:04,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366120242] [2020-07-17 11:44:04,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:04,723 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 11:44:04,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1370296286] [2020-07-17 11:44:04,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:04,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-17 11:44:04,765 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:04,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:44:04,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366120242] [2020-07-17 11:44:04,795 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 11:44:04,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370296286] [2020-07-17 11:44:04,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 11:44:04,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 11:44:04,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529304227] [2020-07-17 11:44:04,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 11:44:04,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:04,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 11:44:04,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 11:44:04,798 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 5 states. [2020-07-17 11:44:04,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:04,850 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-07-17 11:44:04,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 11:44:04,850 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-17 11:44:04,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:04,852 INFO L225 Difference]: With dead ends: 46 [2020-07-17 11:44:04,852 INFO L226 Difference]: Without dead ends: 30 [2020-07-17 11:44:04,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 11:44:04,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-17 11:44:04,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2020-07-17 11:44:04,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-17 11:44:04,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-07-17 11:44:04,860 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2020-07-17 11:44:04,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:04,860 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-07-17 11:44:04,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 11:44:04,861 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-07-17 11:44:04,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-17 11:44:04,862 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:04,862 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:05,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:05,077 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:05,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:05,077 INFO L82 PathProgramCache]: Analyzing trace with hash -457205388, now seen corresponding path program 1 times [2020-07-17 11:44:05,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:05,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879091579] [2020-07-17 11:44:05,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:05,089 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 11:44:05,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624946182] [2020-07-17 11:44:05,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:05,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:05,133 INFO L264 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-17 11:44:05,135 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:05,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:44:05,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879091579] [2020-07-17 11:44:05,158 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 11:44:05,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624946182] [2020-07-17 11:44:05,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 11:44:05,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 11:44:05,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932900730] [2020-07-17 11:44:05,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 11:44:05,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:05,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 11:44:05,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 11:44:05,161 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-07-17 11:44:05,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:05,201 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-17 11:44:05,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 11:44:05,202 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-17 11:44:05,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:05,203 INFO L225 Difference]: With dead ends: 40 [2020-07-17 11:44:05,203 INFO L226 Difference]: Without dead ends: 27 [2020-07-17 11:44:05,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 11:44:05,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-17 11:44:05,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-17 11:44:05,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-17 11:44:05,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-07-17 11:44:05,210 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2020-07-17 11:44:05,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:05,210 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-07-17 11:44:05,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 11:44:05,211 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-07-17 11:44:05,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-17 11:44:05,212 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:05,212 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] [2020-07-17 11:44:05,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:05,428 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:05,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:05,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1431348209, now seen corresponding path program 1 times [2020-07-17 11:44:05,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:05,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277313929] [2020-07-17 11:44:05,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:05,442 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 11:44:05,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [308488485] [2020-07-17 11:44:05,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:05,486 INFO L264 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-17 11:44:05,488 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:44:05,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277313929] [2020-07-17 11:44:05,544 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 11:44:05,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308488485] [2020-07-17 11:44:05,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 11:44:05,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-17 11:44:05,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117682300] [2020-07-17 11:44:05,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 11:44:05,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:05,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 11:44:05,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-17 11:44:05,547 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2020-07-17 11:44:05,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:05,628 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2020-07-17 11:44:05,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 11:44:05,629 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-07-17 11:44:05,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:05,629 INFO L225 Difference]: With dead ends: 46 [2020-07-17 11:44:05,630 INFO L226 Difference]: Without dead ends: 29 [2020-07-17 11:44:05,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-17 11:44:05,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-17 11:44:05,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-17 11:44:05,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-17 11:44:05,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-07-17 11:44:05,646 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 21 [2020-07-17 11:44:05,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:05,646 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-07-17 11:44:05,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 11:44:05,646 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-07-17 11:44:05,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-17 11:44:05,647 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:05,649 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:05,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:05,863 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:05,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:05,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1537894100, now seen corresponding path program 1 times [2020-07-17 11:44:05,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:05,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161733296] [2020-07-17 11:44:05,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:05,876 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 11:44:05,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1277619690] [2020-07-17 11:44:05,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) [2020-07-17 11:44:05,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:05,905 INFO L264 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-17 11:44:05,906 INFO L287 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:44:05,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161733296] [2020-07-17 11:44:05,973 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 11:44:05,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277619690] [2020-07-17 11:44:05,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 11:44:05,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 11:44:05,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928746925] [2020-07-17 11:44:05,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 11:44:05,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:05,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 11:44:05,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-17 11:44:05,975 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2020-07-17 11:44:06,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:06,071 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-07-17 11:44:06,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 11:44:06,071 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-07-17 11:44:06,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:06,072 INFO L225 Difference]: With dead ends: 48 [2020-07-17 11:44:06,072 INFO L226 Difference]: Without dead ends: 31 [2020-07-17 11:44:06,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-17 11:44:06,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-17 11:44:06,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-17 11:44:06,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-17 11:44:06,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-17 11:44:06,079 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 23 [2020-07-17 11:44:06,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:06,079 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-17 11:44:06,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 11:44:06,079 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-17 11:44:06,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-17 11:44:06,080 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:06,080 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:06,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-17 11:44:06,294 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:06,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:06,295 INFO L82 PathProgramCache]: Analyzing trace with hash -849280247, now seen corresponding path program 2 times [2020-07-17 11:44:06,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:06,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962735404] [2020-07-17 11:44:06,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:06,310 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 11:44:06,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815092749] [2020-07-17 11:44:06,310 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:06,353 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 11:44:06,353 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:44:06,354 INFO L264 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-17 11:44:06,356 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:08,446 WARN L860 $PredicateComparison]: unable to prove that (exists ((gcd_test_~b Int)) (and (<= (div (+ (* gcd_test_~b (- 1)) (* |c_gcd_test_#in~a| (- 1))) (- 3)) |c_gcd_test_#in~b|) (<= 0 gcd_test_~b))) is different from true [2020-07-17 11:44:08,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:44:08,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962735404] [2020-07-17 11:44:08,484 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 11:44:08,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815092749] [2020-07-17 11:44:08,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 11:44:08,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-17 11:44:08,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359478611] [2020-07-17 11:44:08,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 11:44:08,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:08,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 11:44:08,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=32, Unknown=1, NotChecked=10, Total=56 [2020-07-17 11:44:08,486 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-07-17 11:44:10,634 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 15 [2020-07-17 11:44:10,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:10,673 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-17 11:44:10,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 11:44:10,678 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-07-17 11:44:10,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:10,680 INFO L225 Difference]: With dead ends: 48 [2020-07-17 11:44:10,680 INFO L226 Difference]: Without dead ends: 35 [2020-07-17 11:44:10,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=26, Invalid=67, Unknown=1, NotChecked=16, Total=110 [2020-07-17 11:44:10,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-17 11:44:10,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-07-17 11:44:10,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-17 11:44:10,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-07-17 11:44:10,686 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 25 [2020-07-17 11:44:10,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:10,687 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-07-17 11:44:10,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 11:44:10,687 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-07-17 11:44:10,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-17 11:44:10,688 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:10,688 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:10,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:10,903 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:10,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:10,904 INFO L82 PathProgramCache]: Analyzing trace with hash -516331098, now seen corresponding path program 3 times [2020-07-17 11:44:10,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:10,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192088861] [2020-07-17 11:44:10,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:44:11,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192088861] [2020-07-17 11:44:11,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285269254] [2020-07-17 11:44:11,066 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:11,108 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-07-17 11:44:11,108 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:44:11,109 INFO L264 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-17 11:44:11,111 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:17,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:44:17,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:44:17,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-17 11:44:17,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011538024] [2020-07-17 11:44:17,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-17 11:44:17,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:17,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-17 11:44:17,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=176, Unknown=1, NotChecked=0, Total=210 [2020-07-17 11:44:17,402 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 15 states. [2020-07-17 11:44:17,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:17,692 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2020-07-17 11:44:17,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 11:44:17,694 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-07-17 11:44:17,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:17,695 INFO L225 Difference]: With dead ends: 54 [2020-07-17 11:44:17,696 INFO L226 Difference]: Without dead ends: 37 [2020-07-17 11:44:17,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=44, Invalid=227, Unknown=1, NotChecked=0, Total=272 [2020-07-17 11:44:17,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-17 11:44:17,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-17 11:44:17,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-17 11:44:17,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-07-17 11:44:17,708 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 27 [2020-07-17 11:44:17,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:17,709 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-07-17 11:44:17,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-17 11:44:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-07-17 11:44:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-17 11:44:17,710 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:17,710 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:17,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:17,928 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:17,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:17,928 INFO L82 PathProgramCache]: Analyzing trace with hash -258165660, now seen corresponding path program 4 times [2020-07-17 11:44:17,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:17,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685820312] [2020-07-17 11:44:17,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:44:18,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685820312] [2020-07-17 11:44:18,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548233190] [2020-07-17 11:44:18,059 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:18,087 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 11:44:18,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:44:18,088 INFO L264 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-17 11:44:18,092 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:44:20,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:44:20,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2020-07-17 11:44:20,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878794472] [2020-07-17 11:44:20,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-17 11:44:20,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:20,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-17 11:44:20,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=176, Unknown=1, NotChecked=0, Total=210 [2020-07-17 11:44:20,350 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 15 states. [2020-07-17 11:44:22,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:22,721 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2020-07-17 11:44:22,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 11:44:22,723 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-07-17 11:44:22,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:22,724 INFO L225 Difference]: With dead ends: 59 [2020-07-17 11:44:22,724 INFO L226 Difference]: Without dead ends: 37 [2020-07-17 11:44:22,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=60, Invalid=281, Unknown=1, NotChecked=0, Total=342 [2020-07-17 11:44:22,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-17 11:44:22,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-07-17 11:44:22,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-17 11:44:22,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-07-17 11:44:22,731 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 27 [2020-07-17 11:44:22,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:22,731 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-07-17 11:44:22,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-17 11:44:22,731 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-07-17 11:44:22,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-17 11:44:22,732 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:22,732 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:22,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-17 11:44:22,936 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:22,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:22,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1878386625, now seen corresponding path program 5 times [2020-07-17 11:44:22,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:22,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356214802] [2020-07-17 11:44:22,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:22,949 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 11:44:22,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754663425] [2020-07-17 11:44:22,949 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:22,988 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-07-17 11:44:22,988 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:44:22,989 INFO L264 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-17 11:44:22,991 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:44:23,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356214802] [2020-07-17 11:44:23,197 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 11:44:23,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754663425] [2020-07-17 11:44:23,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 11:44:23,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-17 11:44:23,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444114274] [2020-07-17 11:44:23,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-17 11:44:23,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:23,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-17 11:44:23,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-07-17 11:44:23,199 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 15 states. [2020-07-17 11:44:23,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:23,569 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-07-17 11:44:23,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 11:44:23,570 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-07-17 11:44:23,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:23,571 INFO L225 Difference]: With dead ends: 54 [2020-07-17 11:44:23,571 INFO L226 Difference]: Without dead ends: 51 [2020-07-17 11:44:23,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-07-17 11:44:23,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-17 11:44:23,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-07-17 11:44:23,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-17 11:44:23,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-07-17 11:44:23,581 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 29 [2020-07-17 11:44:23,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:23,581 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-07-17 11:44:23,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-17 11:44:23,581 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-07-17 11:44:23,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-17 11:44:23,582 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:23,583 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:23,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:23,784 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:23,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:23,785 INFO L82 PathProgramCache]: Analyzing trace with hash 609103937, now seen corresponding path program 6 times [2020-07-17 11:44:23,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:23,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459865478] [2020-07-17 11:44:23,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:23,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:44:23,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459865478] [2020-07-17 11:44:23,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981969118] [2020-07-17 11:44:23,917 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:23,944 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-07-17 11:44:23,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:44:23,945 INFO L264 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-17 11:44:23,947 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-17 11:44:24,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:44:24,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2020-07-17 11:44:24,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504455420] [2020-07-17 11:44:24,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-17 11:44:24,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:24,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-17 11:44:24,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-07-17 11:44:24,202 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 17 states. [2020-07-17 11:44:24,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:24,969 INFO L93 Difference]: Finished difference Result 85 states and 108 transitions. [2020-07-17 11:44:24,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-17 11:44:24,973 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2020-07-17 11:44:24,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:24,974 INFO L225 Difference]: With dead ends: 85 [2020-07-17 11:44:24,974 INFO L226 Difference]: Without dead ends: 48 [2020-07-17 11:44:24,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2020-07-17 11:44:24,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-17 11:44:24,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-17 11:44:24,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-17 11:44:24,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-07-17 11:44:24,981 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 29 [2020-07-17 11:44:24,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:24,982 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-07-17 11:44:24,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-17 11:44:24,982 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-07-17 11:44:24,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-17 11:44:24,983 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:24,983 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:25,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:25,191 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:25,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:25,192 INFO L82 PathProgramCache]: Analyzing trace with hash 841482334, now seen corresponding path program 7 times [2020-07-17 11:44:25,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:25,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254911046] [2020-07-17 11:44:25,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:25,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:44:25,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254911046] [2020-07-17 11:44:25,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120799481] [2020-07-17 11:44:25,431 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:25,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:25,450 INFO L264 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-17 11:44:25,453 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:31,758 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 11:44:31,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:44:31,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2020-07-17 11:44:31,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752159408] [2020-07-17 11:44:31,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-17 11:44:31,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:31,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-17 11:44:31,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=321, Unknown=2, NotChecked=0, Total=380 [2020-07-17 11:44:31,761 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 20 states. [2020-07-17 11:44:32,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:32,123 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2020-07-17 11:44:32,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 11:44:32,125 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-07-17 11:44:32,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:32,126 INFO L225 Difference]: With dead ends: 65 [2020-07-17 11:44:32,126 INFO L226 Difference]: Without dead ends: 46 [2020-07-17 11:44:32,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=85, Invalid=465, Unknown=2, NotChecked=0, Total=552 [2020-07-17 11:44:32,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-17 11:44:32,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-07-17 11:44:32,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-17 11:44:32,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-07-17 11:44:32,133 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 31 [2020-07-17 11:44:32,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:32,134 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-07-17 11:44:32,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-17 11:44:32,134 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-07-17 11:44:32,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-17 11:44:32,135 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:32,135 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:32,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-17 11:44:32,349 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:32,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:32,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1492674782, now seen corresponding path program 8 times [2020-07-17 11:44:32,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:32,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233697872] [2020-07-17 11:44:32,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:32,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:32,387 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-07-17 11:44:32,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233697872] [2020-07-17 11:44:32,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 11:44:32,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 11:44:32,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101770762] [2020-07-17 11:44:32,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 11:44:32,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:32,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 11:44:32,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 11:44:32,392 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 3 states. [2020-07-17 11:44:32,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:32,408 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-07-17 11:44:32,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 11:44:32,409 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-07-17 11:44:32,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:32,410 INFO L225 Difference]: With dead ends: 60 [2020-07-17 11:44:32,410 INFO L226 Difference]: Without dead ends: 47 [2020-07-17 11:44:32,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 11:44:32,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-17 11:44:32,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-07-17 11:44:32,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-17 11:44:32,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-07-17 11:44:32,417 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 31 [2020-07-17 11:44:32,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:32,417 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-07-17 11:44:32,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 11:44:32,417 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-07-17 11:44:32,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-17 11:44:32,418 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:32,419 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:32,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-17 11:44:32,419 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:32,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:32,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1099647772, now seen corresponding path program 9 times [2020-07-17 11:44:32,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:32,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858401924] [2020-07-17 11:44:32,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:32,583 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:44:32,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858401924] [2020-07-17 11:44:32,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036963106] [2020-07-17 11:44:32,584 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:32,628 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-07-17 11:44:32,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:44:32,629 INFO L264 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-17 11:44:32,631 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:44:34,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:44:34,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2020-07-17 11:44:34,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393447961] [2020-07-17 11:44:34,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-17 11:44:34,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:34,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-17 11:44:34,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=298, Unknown=1, NotChecked=0, Total=342 [2020-07-17 11:44:34,131 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 19 states. [2020-07-17 11:44:36,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:36,784 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2020-07-17 11:44:36,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 11:44:36,786 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 31 [2020-07-17 11:44:36,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:36,786 INFO L225 Difference]: With dead ends: 73 [2020-07-17 11:44:36,787 INFO L226 Difference]: Without dead ends: 48 [2020-07-17 11:44:36,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=98, Invalid=551, Unknown=1, NotChecked=0, Total=650 [2020-07-17 11:44:36,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-17 11:44:36,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-17 11:44:36,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-17 11:44:36,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-07-17 11:44:36,794 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 31 [2020-07-17 11:44:36,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:36,794 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-07-17 11:44:36,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-17 11:44:36,795 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-07-17 11:44:36,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-17 11:44:36,795 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:36,796 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:36,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-17 11:44:36,997 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:36,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:36,997 INFO L82 PathProgramCache]: Analyzing trace with hash -202245895, now seen corresponding path program 10 times [2020-07-17 11:44:36,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:36,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125761942] [2020-07-17 11:44:36,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:37,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:44:37,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125761942] [2020-07-17 11:44:37,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224900398] [2020-07-17 11:44:37,354 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:37,406 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 11:44:37,406 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:44:37,407 INFO L264 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-17 11:44:37,408 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:44:39,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:44:39,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2020-07-17 11:44:39,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825571655] [2020-07-17 11:44:39,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-17 11:44:39,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:39,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-17 11:44:39,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=438, Unknown=1, NotChecked=0, Total=506 [2020-07-17 11:44:39,230 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 23 states. [2020-07-17 11:44:45,147 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-17 11:44:50,533 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-17 11:44:52,705 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 28 [2020-07-17 11:44:54,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:54,787 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2020-07-17 11:44:54,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-17 11:44:54,789 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 33 [2020-07-17 11:44:54,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:54,789 INFO L225 Difference]: With dead ends: 80 [2020-07-17 11:44:54,789 INFO L226 Difference]: Without dead ends: 35 [2020-07-17 11:44:54,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=150, Invalid=1038, Unknown=2, NotChecked=0, Total=1190 [2020-07-17 11:44:54,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-17 11:44:54,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-17 11:44:54,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-17 11:44:54,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 34 transitions. [2020-07-17 11:44:54,795 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 34 transitions. Word has length 33 [2020-07-17 11:44:54,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:54,795 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 34 transitions. [2020-07-17 11:44:54,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-17 11:44:54,796 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 34 transitions. [2020-07-17 11:44:54,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-17 11:44:54,796 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:54,797 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:55,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-17 11:44:55,009 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:55,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:55,010 INFO L82 PathProgramCache]: Analyzing trace with hash -825201876, now seen corresponding path program 1 times [2020-07-17 11:44:55,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:55,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996909033] [2020-07-17 11:44:55,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:55,018 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 11:44:55,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662394236] [2020-07-17 11:44:55,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:55,046 INFO L264 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-17 11:44:55,048 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:55,241 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-17 11:44:55,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996909033] [2020-07-17 11:44:55,242 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 11:44:55,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662394236] [2020-07-17 11:44:55,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 11:44:55,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-17 11:44:55,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435087436] [2020-07-17 11:44:55,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 11:44:55,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:55,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 11:44:55,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-07-17 11:44:55,244 INFO L87 Difference]: Start difference. First operand 35 states and 34 transitions. Second operand 12 states. [2020-07-17 11:44:55,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:55,568 INFO L93 Difference]: Finished difference Result 35 states and 34 transitions. [2020-07-17 11:44:55,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 11:44:55,571 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-07-17 11:44:55,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:55,571 INFO L225 Difference]: With dead ends: 35 [2020-07-17 11:44:55,572 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 11:44:55,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-07-17 11:44:55,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 11:44:55,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 11:44:55,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 11:44:55,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 11:44:55,574 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2020-07-17 11:44:55,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:55,574 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 11:44:55,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 11:44:55,575 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 11:44:55,575 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 11:44:55,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:55,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 11:47:33,084 WARN L193 SmtUtils]: Spent 2.62 m on a formula simplification. DAG size of input: 164 DAG size of output: 86 [2020-07-17 11:47:33,092 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-17 11:47:33,093 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-17 11:47:33,093 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-17 11:47:33,093 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 11:47:33,093 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 11:47:33,093 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-17 11:47:33,093 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 30 46) the Hoare annotation is: true [2020-07-17 11:47:33,093 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 30 46) no Hoare annotation was computed. [2020-07-17 11:47:33,093 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-07-17 11:47:33,093 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: (and (<= main_~y~0 18) (<= 18 main_~y~0) (= main_~x~0 (* main_~g~0 7)) (= 63 main_~x~0)) [2020-07-17 11:47:33,094 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (= 18 main_~y~0) (= main_~x~0 (* main_~g~0 7)) (= 63 main_~x~0)) [2020-07-17 11:47:33,094 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 30 46) no Hoare annotation was computed. [2020-07-17 11:47:33,094 INFO L264 CegarLoopResult]: At program point L41-1(line 41) the Hoare annotation is: (and (= 18 main_~y~0) (= main_~x~0 (* main_~g~0 7)) (= 63 main_~x~0)) [2020-07-17 11:47:33,094 INFO L264 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (= 18 main_~y~0) (= 63 main_~x~0)) [2020-07-17 11:47:33,094 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-07-17 11:47:33,094 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 4 9) the Hoare annotation is: true [2020-07-17 11:47:33,094 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 4 9) no Hoare annotation was computed. [2020-07-17 11:47:33,094 INFO L268 CegarLoopResult]: For program point L6(line 6) no Hoare annotation was computed. [2020-07-17 11:47:33,094 INFO L268 CegarLoopResult]: For program point L5(lines 5 7) no Hoare annotation was computed. [2020-07-17 11:47:33,094 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2020-07-17 11:47:33,095 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 9) no Hoare annotation was computed. [2020-07-17 11:47:33,095 INFO L268 CegarLoopResult]: For program point gcd_testEXIT(lines 10 27) no Hoare annotation was computed. [2020-07-17 11:47:33,095 INFO L268 CegarLoopResult]: For program point L19-2(lines 19 25) no Hoare annotation was computed. [2020-07-17 11:47:33,095 INFO L268 CegarLoopResult]: For program point L13-1(lines 11 27) no Hoare annotation was computed. [2020-07-17 11:47:33,095 INFO L271 CegarLoopResult]: At program point gcd_testENTRY(lines 10 27) the Hoare annotation is: true [2020-07-17 11:47:33,095 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-17 11:47:33,095 INFO L264 CegarLoopResult]: At program point L20-2(lines 19 25) the Hoare annotation is: (let ((.cse0 (* 2 gcd_test_~b)) (.cse1 (= gcd_test_~b |gcd_test_#in~b|))) (or (and (<= (+ (* 21 |gcd_test_#in~b|) 1) (+ .cse0 (* 6 |gcd_test_#in~a|))) (exists ((v_gcd_test_~a_27 Int)) (and (<= (+ |gcd_test_#in~b| 1) (* 2 v_gcd_test_~a_27)) (<= |gcd_test_#in~b| (div (+ (* v_gcd_test_~a_27 (- 1)) |gcd_test_#in~a|) 3))))) (let ((.cse2 (+ .cse0 gcd_test_~a))) (and .cse1 (<= .cse2 |gcd_test_#in~a|) (<= |gcd_test_#in~a| .cse2))) (and (<= |gcd_test_#in~a| 0) (<= |gcd_test_#in~a| gcd_test_~a)) (let ((.cse3 (+ gcd_test_~b gcd_test_~a))) (and .cse1 (<= |gcd_test_#in~a| .cse3) (<= .cse3 |gcd_test_#in~a|))) (and (<= (+ gcd_test_~b (* 2 gcd_test_~a)) |gcd_test_#in~b|) (exists ((v_gcd_test_~a_34 Int)) (and (<= v_gcd_test_~a_34 (+ gcd_test_~b gcd_test_~a)) (<= (+ (* 2 v_gcd_test_~a_34) gcd_test_~b) |gcd_test_#in~b|) (<= (div (+ v_gcd_test_~a_34 (* |gcd_test_#in~a| (- 1))) (- 3)) |gcd_test_#in~b|)))) (let ((.cse4 (+ (* 3 gcd_test_~b) gcd_test_~a))) (and (= |gcd_test_#in~a| (+ gcd_test_~a (* |gcd_test_#in~b| 3))) (<= .cse4 |gcd_test_#in~a|) (<= |gcd_test_#in~a| .cse4))) (and (= |gcd_test_#in~a| (+ (* gcd_test_~b 3) (* gcd_test_~a 4))) (<= |gcd_test_#in~b| (div (+ (* gcd_test_~a (- 1)) |gcd_test_#in~a|) 3)) (<= (div (+ gcd_test_~a (* |gcd_test_#in~a| (- 1))) (- 3)) |gcd_test_#in~b|)) (<= (+ (* 2 |gcd_test_#in~a|) 1) (* 7 |gcd_test_#in~b|)) (<= |gcd_test_#in~a| |gcd_test_#in~b|) (and .cse1 (= gcd_test_~a |gcd_test_#in~a|)))) [2020-07-17 11:47:33,096 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-07-17 11:47:33,096 INFO L268 CegarLoopResult]: For program point L12-2(lines 11 27) no Hoare annotation was computed. [2020-07-17 11:47:33,096 INFO L268 CegarLoopResult]: For program point gcd_testFINAL(lines 10 27) no Hoare annotation was computed. [2020-07-17 11:47:33,110 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_27,QUANTIFIED] [2020-07-17 11:47:33,111 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_27,QUANTIFIED] [2020-07-17 11:47:33,112 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_34,QUANTIFIED] [2020-07-17 11:47:33,113 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_34,QUANTIFIED] [2020-07-17 11:47:33,113 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_34,QUANTIFIED] [2020-07-17 11:47:33,124 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_27,QUANTIFIED] [2020-07-17 11:47:33,124 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_27,QUANTIFIED] [2020-07-17 11:47:33,124 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_34,QUANTIFIED] [2020-07-17 11:47:33,125 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_34,QUANTIFIED] [2020-07-17 11:47:33,125 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_34,QUANTIFIED] [2020-07-17 11:47:33,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 11:47:33 BoogieIcfgContainer [2020-07-17 11:47:33,129 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 11:47:33,130 INFO L168 Benchmark]: Toolchain (without parser) took 210005.05 ms. Allocated memory was 137.9 MB in the beginning and 288.9 MB in the end (delta: 151.0 MB). Free memory was 102.4 MB in the beginning and 201.6 MB in the end (delta: -99.2 MB). Peak memory consumption was 159.6 MB. Max. memory is 7.1 GB. [2020-07-17 11:47:33,131 INFO L168 Benchmark]: CDTParser took 0.47 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-17 11:47:33,131 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.39 ms. Allocated memory is still 137.9 MB. Free memory was 102.0 MB in the beginning and 92.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-17 11:47:33,132 INFO L168 Benchmark]: Boogie Preprocessor took 104.59 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 92.4 MB in the beginning and 181.0 MB in the end (delta: -88.6 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2020-07-17 11:47:33,132 INFO L168 Benchmark]: RCFGBuilder took 262.25 ms. Allocated memory is still 201.9 MB. Free memory was 181.0 MB in the beginning and 167.3 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-07-17 11:47:33,133 INFO L168 Benchmark]: TraceAbstraction took 209372.92 ms. Allocated memory was 201.9 MB in the beginning and 288.9 MB in the end (delta: 87.0 MB). Free memory was 166.6 MB in the beginning and 201.6 MB in the end (delta: -35.0 MB). Peak memory consumption was 159.8 MB. Max. memory is 7.1 GB. [2020-07-17 11:47:33,135 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 259.39 ms. Allocated memory is still 137.9 MB. Free memory was 102.0 MB in the beginning and 92.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 104.59 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 92.4 MB in the beginning and 181.0 MB in the end (delta: -88.6 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 262.25 ms. Allocated memory is still 201.9 MB. Free memory was 181.0 MB in the beginning and 167.3 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 209372.92 ms. Allocated memory was 201.9 MB in the beginning and 288.9 MB in the end (delta: 87.0 MB). Free memory was 166.6 MB in the beginning and 201.6 MB in the end (delta: -35.0 MB). Peak memory consumption was 159.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_27,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_27,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_34,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_34,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_34,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_27,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_27,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_34,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_34,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_34,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant [2020-07-17 11:47:33,141 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_27,QUANTIFIED] [2020-07-17 11:47:33,141 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_27,QUANTIFIED] [2020-07-17 11:47:33,142 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_34,QUANTIFIED] [2020-07-17 11:47:33,142 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_34,QUANTIFIED] [2020-07-17 11:47:33,142 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_34,QUANTIFIED] [2020-07-17 11:47:33,143 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_27,QUANTIFIED] [2020-07-17 11:47:33,144 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_27,QUANTIFIED] [2020-07-17 11:47:33,144 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_34,QUANTIFIED] [2020-07-17 11:47:33,144 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_34,QUANTIFIED] [2020-07-17 11:47:33,144 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_34,QUANTIFIED] Derived loop invariant: (((((((((21 * \old(b) + 1 <= 2 * b + 6 * \old(a) && (\exists v_gcd_test_~a_27 : int :: \old(b) + 1 <= 2 * v_gcd_test_~a_27 && \old(b) <= (v_gcd_test_~a_27 * -1 + \old(a)) / 3)) || ((b == \old(b) && 2 * b + a <= \old(a)) && \old(a) <= 2 * b + a)) || (\old(a) <= 0 && \old(a) <= a)) || ((b == \old(b) && \old(a) <= b + a) && b + a <= \old(a))) || (b + 2 * a <= \old(b) && (\exists v_gcd_test_~a_34 : int :: (v_gcd_test_~a_34 <= b + a && 2 * v_gcd_test_~a_34 + b <= \old(b)) && (v_gcd_test_~a_34 + \old(a) * -1) / -3 <= \old(b)))) || ((\old(a) == a + \old(b) * 3 && 3 * b + a <= \old(a)) && \old(a) <= 3 * b + a)) || ((\old(a) == b * 3 + a * 4 && \old(b) <= (a * -1 + \old(a)) / 3) && (a + \old(a) * -1) / -3 <= \old(b))) || 2 * \old(a) + 1 <= 7 * \old(b)) || \old(a) <= \old(b)) || (b == \old(b) && a == \old(a)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 51.9s, OverallIterations: 16, TraceHistogramMax: 7, AutomataDifference: 25.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 157.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 353 SDtfs, 281 SDslu, 2059 SDs, 0 SdLazy, 2194 SolverSat, 129 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 14.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 503 GetRequests, 299 SyntacticMatches, 2 SemanticMatches, 202 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 31.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 20 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 55 PreInvPairs, 102 NumberOfFragments, 224 HoareAnnotationTreeSize, 55 FomulaSimplifications, 1087 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 11 FomulaSimplificationsInter, 542 FormulaSimplificationTreeSizeReductionInter, 157.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 22.4s InterpolantComputationTime, 591 NumberOfCodeBlocks, 589 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 569 ConstructedInterpolants, 24 QuantifiedInterpolants, 93575 SizeOfPredicates, 50 NumberOfNonLiveVariables, 858 ConjunctsInSsa, 174 ConjunctsInUnsatCore, 22 InterpolantComputations, 5 PerfectInterpolantSequences, 51/458 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...