/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/gcd_4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 03:19:59,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 03:19:59,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 03:19:59,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 03:19:59,125 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 03:19:59,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 03:19:59,127 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 03:19:59,129 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 03:19:59,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 03:19:59,131 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 03:19:59,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 03:19:59,133 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 03:19:59,134 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 03:19:59,135 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 03:19:59,136 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 03:19:59,137 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 03:19:59,138 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 03:19:59,139 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 03:19:59,140 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 03:19:59,142 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 03:19:59,143 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 03:19:59,144 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 03:19:59,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 03:19:59,146 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 03:19:59,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 03:19:59,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 03:19:59,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 03:19:59,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 03:19:59,158 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 03:19:59,173 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 03:19:59,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 03:19:59,174 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 03:19:59,175 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 03:19:59,175 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 03:19:59,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 03:19:59,175 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 03:19:59,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 03:19:59,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 03:19:59,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 03:19:59,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 03:19:59,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 03:19:59,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 03:19:59,176 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 03:19:59,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 03:19:59,177 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 03:19:59,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 03:19:59,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 03:19:59,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 03:19:59,178 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 03:19:59,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 03:19:59,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:19:59,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 03:19:59,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 03:19:59,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 03:19:59,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 03:19:59,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 03:19:59,179 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 03:19:59,179 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 03:19:59,180 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 03:19:59,477 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 03:19:59,491 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 03:19:59,494 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 03:19:59,495 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 03:19:59,496 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 03:19:59,497 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/gcd_4.c [2020-07-20 03:19:59,557 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/defeb1f77/2a3ed4f0ac374f039ba7df993010a234/FLAGe6912a311 [2020-07-20 03:20:00,000 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 03:20:00,001 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/gcd_4.c [2020-07-20 03:20:00,007 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/defeb1f77/2a3ed4f0ac374f039ba7df993010a234/FLAGe6912a311 [2020-07-20 03:20:00,385 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/defeb1f77/2a3ed4f0ac374f039ba7df993010a234 [2020-07-20 03:20:00,393 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 03:20:00,396 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 03:20:00,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 03:20:00,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 03:20:00,400 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 03:20:00,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:20:00" (1/1) ... [2020-07-20 03:20:00,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c8e9f1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:00, skipping insertion in model container [2020-07-20 03:20:00,404 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:20:00" (1/1) ... [2020-07-20 03:20:00,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 03:20:00,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 03:20:00,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:20:00,611 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 03:20:00,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:20:00,645 INFO L208 MainTranslator]: Completed translation [2020-07-20 03:20:00,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:00 WrapperNode [2020-07-20 03:20:00,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 03:20:00,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 03:20:00,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 03:20:00,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 03:20:00,660 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:00" (1/1) ... [2020-07-20 03:20:00,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:00" (1/1) ... [2020-07-20 03:20:00,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:00" (1/1) ... [2020-07-20 03:20:00,667 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:00" (1/1) ... [2020-07-20 03:20:00,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:00" (1/1) ... [2020-07-20 03:20:00,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:00" (1/1) ... [2020-07-20 03:20:00,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:00" (1/1) ... [2020-07-20 03:20:00,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 03:20:00,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 03:20:00,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 03:20:00,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 03:20:00,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:20:00,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 03:20:00,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 03:20:00,826 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 03:20:00,826 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd_test [2020-07-20 03:20:00,826 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 03:20:00,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 03:20:00,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 03:20:00,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 03:20:00,827 INFO L130 BoogieDeclarations]: Found specification of procedure gcd_test [2020-07-20 03:20:00,827 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 03:20:00,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 03:20:00,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 03:20:01,034 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 03:20:01,034 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 03:20:01,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:20:01 BoogieIcfgContainer [2020-07-20 03:20:01,038 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 03:20:01,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 03:20:01,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 03:20:01,043 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 03:20:01,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:20:00" (1/3) ... [2020-07-20 03:20:01,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2706c697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:20:01, skipping insertion in model container [2020-07-20 03:20:01,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:00" (2/3) ... [2020-07-20 03:20:01,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2706c697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:20:01, skipping insertion in model container [2020-07-20 03:20:01,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:20:01" (3/3) ... [2020-07-20 03:20:01,048 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd_4.c [2020-07-20 03:20:01,060 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 03:20:01,068 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 03:20:01,089 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 03:20:01,137 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 03:20:01,137 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 03:20:01,137 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 03:20:01,137 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 03:20:01,138 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 03:20:01,138 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 03:20:01,138 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 03:20:01,138 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 03:20:01,162 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-07-20 03:20:01,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 03:20:01,170 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:01,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:20:01,172 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:01,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:01,178 INFO L82 PathProgramCache]: Analyzing trace with hash 876608673, now seen corresponding path program 1 times [2020-07-20 03:20:01,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:01,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459533066] [2020-07-20 03:20:01,189 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b71dd [2020-07-20 03:20:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:20:01,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459533066] [2020-07-20 03:20:01,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:20:01,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 03:20:01,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048788151] [2020-07-20 03:20:01,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 03:20:01,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:01,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 03:20:01,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 03:20:01,419 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 4 states. [2020-07-20 03:20:01,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:01,488 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2020-07-20 03:20:01,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 03:20:01,490 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-07-20 03:20:01,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:01,502 INFO L225 Difference]: With dead ends: 55 [2020-07-20 03:20:01,503 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 03:20:01,506 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 [2020-07-20 03:20:01,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 03:20:01,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-07-20 03:20:01,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 03:20:01,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-07-20 03:20:01,552 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 17 [2020-07-20 03:20:01,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:01,553 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-07-20 03:20:01,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 03:20:01,554 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-07-20 03:20:01,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 03:20:01,556 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:01,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:20:01,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 03:20:01,558 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:01,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:01,559 INFO L82 PathProgramCache]: Analyzing trace with hash 483581663, now seen corresponding path program 1 times [2020-07-20 03:20:01,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:01,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680248888] [2020-07-20 03:20:01,559 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b71dd [2020-07-20 03:20:01,575 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 03:20:01,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1370700200] [2020-07-20 03:20:01,576 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ba861cb No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:01,646 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ba861cb issued 2 check-sat command(s) [2020-07-20 03:20:01,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:20:01,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 03:20:01,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:20:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:20:01,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680248888] [2020-07-20 03:20:01,713 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 03:20:01,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370700200] [2020-07-20 03:20:01,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:20:01,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:20:01,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177332077] [2020-07-20 03:20:01,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:20:01,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:01,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:20:01,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:20:01,718 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 5 states. [2020-07-20 03:20:01,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:01,804 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-07-20 03:20:01,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:20:01,805 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-20 03:20:01,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:01,807 INFO L225 Difference]: With dead ends: 47 [2020-07-20 03:20:01,807 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 03:20:01,808 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 [2020-07-20 03:20:01,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 03:20:01,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2020-07-20 03:20:01,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 03:20:01,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-07-20 03:20:01,816 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 17 [2020-07-20 03:20:01,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:01,816 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-07-20 03:20:01,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:20:01,817 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-07-20 03:20:01,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 03:20:01,818 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:01,818 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:20:02,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 03:20:02,033 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:02,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:02,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1158269966, now seen corresponding path program 1 times [2020-07-20 03:20:02,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:02,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755610208] [2020-07-20 03:20:02,035 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b71dd [2020-07-20 03:20:02,050 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 03:20:02,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808170993] [2020-07-20 03:20:02,051 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@772723de No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:02,104 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@772723de issued 2 check-sat command(s) [2020-07-20 03:20:02,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:20:02,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 03:20:02,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:20:02,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:20:02,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755610208] [2020-07-20 03:20:02,143 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 03:20:02,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808170993] [2020-07-20 03:20:02,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:20:02,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:20:02,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119264867] [2020-07-20 03:20:02,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:20:02,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:02,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:20:02,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:20:02,146 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 5 states. [2020-07-20 03:20:02,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:02,205 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-07-20 03:20:02,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:20:02,206 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-20 03:20:02,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:02,207 INFO L225 Difference]: With dead ends: 46 [2020-07-20 03:20:02,207 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 03:20:02,208 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 [2020-07-20 03:20:02,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 03:20:02,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2020-07-20 03:20:02,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 03:20:02,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-07-20 03:20:02,215 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2020-07-20 03:20:02,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:02,216 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-07-20 03:20:02,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:20:02,216 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-07-20 03:20:02,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 03:20:02,217 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:02,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:20:02,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:02,433 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:02,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:02,435 INFO L82 PathProgramCache]: Analyzing trace with hash -457205388, now seen corresponding path program 1 times [2020-07-20 03:20:02,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:02,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551787439] [2020-07-20 03:20:02,437 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b71dd [2020-07-20 03:20:02,447 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 03:20:02,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589532412] [2020-07-20 03:20:02,448 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4d162643 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:02,500 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4d162643 issued 3 check-sat command(s) [2020-07-20 03:20:02,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:20:02,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 03:20:02,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:20:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:20:02,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551787439] [2020-07-20 03:20:02,544 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 03:20:02,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589532412] [2020-07-20 03:20:02,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:20:02,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:20:02,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4432235] [2020-07-20 03:20:02,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:20:02,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:02,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:20:02,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:20:02,550 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-07-20 03:20:02,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:02,600 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-20 03:20:02,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:20:02,604 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-20 03:20:02,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:02,605 INFO L225 Difference]: With dead ends: 40 [2020-07-20 03:20:02,606 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 03:20:02,607 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 [2020-07-20 03:20:02,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 03:20:02,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 03:20:02,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 03:20:02,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-07-20 03:20:02,620 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2020-07-20 03:20:02,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:02,623 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-07-20 03:20:02,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:20:02,623 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-07-20 03:20:02,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 03:20:02,624 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:02,624 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] [2020-07-20 03:20:02,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:02,838 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:02,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:02,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1431348209, now seen corresponding path program 1 times [2020-07-20 03:20:02,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:02,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994815543] [2020-07-20 03:20:02,841 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b71dd [2020-07-20 03:20:02,854 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 03:20:02,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1273655898] [2020-07-20 03:20:02,855 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@69384916 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:02,900 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@69384916 issued 1 check-sat command(s) [2020-07-20 03:20:02,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:20:02,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 03:20:02,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:20:02,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:20:02,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994815543] [2020-07-20 03:20:02,941 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 03:20:02,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273655898] [2020-07-20 03:20:02,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 03:20:02,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-07-20 03:20:02,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119200475] [2020-07-20 03:20:02,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:20:02,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:02,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:20:02,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:20:02,943 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2020-07-20 03:20:02,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:02,986 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-07-20 03:20:02,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:20:02,986 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-20 03:20:02,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:02,988 INFO L225 Difference]: With dead ends: 44 [2020-07-20 03:20:02,988 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 03:20:02,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:20:02,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 03:20:02,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-20 03:20:02,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 03:20:02,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-07-20 03:20:02,995 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 21 [2020-07-20 03:20:02,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:02,995 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-07-20 03:20:02,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:20:02,996 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-07-20 03:20:02,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 03:20:02,997 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:02,997 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] [2020-07-20 03:20:03,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:03,210 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:03,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:03,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1537894100, now seen corresponding path program 1 times [2020-07-20 03:20:03,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:03,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335248489] [2020-07-20 03:20:03,212 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b71dd [2020-07-20 03:20:03,227 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 03:20:03,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347630986] [2020-07-20 03:20:03,228 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1d78ac44 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:03,273 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1d78ac44 issued 2 check-sat command(s) [2020-07-20 03:20:03,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:20:03,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 03:20:03,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:20:03,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:20:03,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335248489] [2020-07-20 03:20:03,345 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 03:20:03,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347630986] [2020-07-20 03:20:03,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 03:20:03,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-20 03:20:03,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562013490] [2020-07-20 03:20:03,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 03:20:03,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:03,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 03:20:03,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:20:03,347 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 6 states. [2020-07-20 03:20:03,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:03,405 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-07-20 03:20:03,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 03:20:03,406 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-07-20 03:20:03,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:03,407 INFO L225 Difference]: With dead ends: 46 [2020-07-20 03:20:03,408 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 03:20:03,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 03:20:03,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 03:20:03,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-20 03:20:03,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 03:20:03,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-20 03:20:03,415 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 23 [2020-07-20 03:20:03,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:03,415 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-20 03:20:03,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 03:20:03,415 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-20 03:20:03,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 03:20:03,416 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:03,416 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] [2020-07-20 03:20:03,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 03:20:03,618 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:03,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:03,618 INFO L82 PathProgramCache]: Analyzing trace with hash -849280247, now seen corresponding path program 2 times [2020-07-20 03:20:03,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:03,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054648035] [2020-07-20 03:20:03,620 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b71dd [2020-07-20 03:20:03,630 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 03:20:03,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322821504] [2020-07-20 03:20:03,631 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b8ac975 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:03,671 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b8ac975 issued 2 check-sat command(s) [2020-07-20 03:20:03,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:20:03,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 03:20:03,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:20:05,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:20:05,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054648035] [2020-07-20 03:20:05,303 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 03:20:05,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322821504] [2020-07-20 03:20:05,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 03:20:05,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-20 03:20:05,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570352686] [2020-07-20 03:20:05,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 03:20:05,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:05,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 03:20:05,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 03:20:05,306 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2020-07-20 03:20:08,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:08,173 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-20 03:20:08,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 03:20:08,180 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-07-20 03:20:08,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:08,181 INFO L225 Difference]: With dead ends: 48 [2020-07-20 03:20:08,181 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 03:20:08,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:20:08,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 03:20:08,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 03:20:08,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 03:20:08,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-20 03:20:08,190 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 25 [2020-07-20 03:20:08,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:08,191 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-20 03:20:08,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 03:20:08,191 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-20 03:20:08,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 03:20:08,192 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:08,192 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] [2020-07-20 03:20:08,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:08,408 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:08,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:08,409 INFO L82 PathProgramCache]: Analyzing trace with hash -516331098, now seen corresponding path program 3 times [2020-07-20 03:20:08,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:08,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764427198] [2020-07-20 03:20:08,410 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b71dd [2020-07-20 03:20:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:08,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:20:08,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764427198] [2020-07-20 03:20:08,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728172310] [2020-07-20 03:20:08,572 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@dfd0f37 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:08,630 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@dfd0f37 issued 3 check-sat command(s) [2020-07-20 03:20:08,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:20:08,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 03:20:08,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:20:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:20:10,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:20:10,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-20 03:20:10,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528574927] [2020-07-20 03:20:10,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 03:20:10,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:10,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 03:20:10,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=176, Unknown=1, NotChecked=0, Total=210 [2020-07-20 03:20:10,903 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 15 states. [2020-07-20 03:20:15,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:15,265 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-07-20 03:20:15,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 03:20:15,268 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-07-20 03:20:15,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:15,271 INFO L225 Difference]: With dead ends: 52 [2020-07-20 03:20:15,271 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 03:20:15,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=44, Invalid=227, Unknown=1, NotChecked=0, Total=272 [2020-07-20 03:20:15,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 03:20:15,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-20 03:20:15,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 03:20:15,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-20 03:20:15,284 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2020-07-20 03:20:15,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:15,285 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-20 03:20:15,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 03:20:15,285 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-20 03:20:15,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 03:20:15,294 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:15,295 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] [2020-07-20 03:20:15,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:15,509 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:15,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:15,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1878386625, now seen corresponding path program 4 times [2020-07-20 03:20:15,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:15,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910452382] [2020-07-20 03:20:15,512 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b71dd [2020-07-20 03:20:15,523 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 03:20:15,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1755260331] [2020-07-20 03:20:15,524 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1896ebb2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:15,581 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1896ebb2 issued 4 check-sat command(s) [2020-07-20 03:20:15,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:20:15,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 03:20:15,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:20:15,784 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:20:15,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910452382] [2020-07-20 03:20:15,785 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 03:20:15,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755260331] [2020-07-20 03:20:15,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 03:20:15,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-20 03:20:15,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066193528] [2020-07-20 03:20:15,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 03:20:15,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:15,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 03:20:15,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:20:15,787 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 15 states. [2020-07-20 03:20:16,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:16,160 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-07-20 03:20:16,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 03:20:16,162 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-07-20 03:20:16,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:16,164 INFO L225 Difference]: With dead ends: 52 [2020-07-20 03:20:16,164 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 03:20:16,165 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 [2020-07-20 03:20:16,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 03:20:16,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-07-20 03:20:16,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 03:20:16,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-07-20 03:20:16,174 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 29 [2020-07-20 03:20:16,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:16,174 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-07-20 03:20:16,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 03:20:16,175 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-07-20 03:20:16,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 03:20:16,176 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:16,176 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] [2020-07-20 03:20:16,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-20 03:20:16,378 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:16,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:16,379 INFO L82 PathProgramCache]: Analyzing trace with hash 841482334, now seen corresponding path program 5 times [2020-07-20 03:20:16,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:16,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291419687] [2020-07-20 03:20:16,380 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b71dd [2020-07-20 03:20:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:20:16,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291419687] [2020-07-20 03:20:16,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151771944] [2020-07-20 03:20:16,625 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@51d2c63 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-07-20 03:20:16,654 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@51d2c63 issued 2 check-sat command(s) [2020-07-20 03:20:16,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:20:16,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 03:20:16,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 03:20:23,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:20:23,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2020-07-20 03:20:23,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030878661] [2020-07-20 03:20:23,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 03:20:23,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:23,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 03:20:23,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=321, Unknown=2, NotChecked=0, Total=380 [2020-07-20 03:20:23,047 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 20 states. [2020-07-20 03:20:23,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:23,413 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2020-07-20 03:20:23,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 03:20:23,416 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-07-20 03:20:23,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:23,417 INFO L225 Difference]: With dead ends: 65 [2020-07-20 03:20:23,417 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 03:20:23,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=85, Invalid=465, Unknown=2, NotChecked=0, Total=552 [2020-07-20 03:20:23,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 03:20:23,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-07-20 03:20:23,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 03:20:23,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-07-20 03:20:23,426 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 31 [2020-07-20 03:20:23,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:23,426 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-07-20 03:20:23,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 03:20:23,427 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-07-20 03:20:23,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 03:20:23,428 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:23,428 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] [2020-07-20 03:20:23,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:23,642 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:23,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:23,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1492674782, now seen corresponding path program 6 times [2020-07-20 03:20:23,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:23,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442986805] [2020-07-20 03:20:23,643 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b71dd [2020-07-20 03:20:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-07-20 03:20:23,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442986805] [2020-07-20 03:20:23,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:20:23,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 03:20:23,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732789444] [2020-07-20 03:20:23,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 03:20:23,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:23,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 03:20:23,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:20:23,681 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 3 states. [2020-07-20 03:20:23,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:23,710 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-07-20 03:20:23,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 03:20:23,711 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-07-20 03:20:23,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:23,713 INFO L225 Difference]: With dead ends: 60 [2020-07-20 03:20:23,713 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 03:20:23,714 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 [2020-07-20 03:20:23,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 03:20:23,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-07-20 03:20:23,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 03:20:23,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-07-20 03:20:23,729 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 31 [2020-07-20 03:20:23,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:23,729 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-07-20 03:20:23,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 03:20:23,733 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-07-20 03:20:23,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 03:20:23,735 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:23,735 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] [2020-07-20 03:20:23,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-20 03:20:23,736 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:23,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:23,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1099647772, now seen corresponding path program 7 times [2020-07-20 03:20:23,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:23,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039623258] [2020-07-20 03:20:23,741 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b71dd [2020-07-20 03:20:23,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:20:23,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039623258] [2020-07-20 03:20:23,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282792188] [2020-07-20 03:20:23,959 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@e09aa0d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:23,978 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@e09aa0d issued 2 check-sat command(s) [2020-07-20 03:20:23,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:20:23,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 03:20:23,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:20:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:20:26,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:20:26,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-20 03:20:26,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304962886] [2020-07-20 03:20:26,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 03:20:26,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:26,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 03:20:26,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=264, Unknown=1, NotChecked=0, Total=306 [2020-07-20 03:20:26,311 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 18 states. [2020-07-20 03:20:26,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:26,628 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-07-20 03:20:26,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 03:20:26,629 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 31 [2020-07-20 03:20:26,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:26,630 INFO L225 Difference]: With dead ends: 64 [2020-07-20 03:20:26,630 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 03:20:26,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=68, Invalid=351, Unknown=1, NotChecked=0, Total=420 [2020-07-20 03:20:26,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 03:20:26,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-20 03:20:26,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 03:20:26,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-07-20 03:20:26,641 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 31 [2020-07-20 03:20:26,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:26,641 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-07-20 03:20:26,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 03:20:26,641 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-07-20 03:20:26,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 03:20:26,644 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:26,644 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] [2020-07-20 03:20:26,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:26,855 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:26,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:26,856 INFO L82 PathProgramCache]: Analyzing trace with hash -202245895, now seen corresponding path program 8 times [2020-07-20 03:20:26,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:26,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843521721] [2020-07-20 03:20:26,857 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b71dd [2020-07-20 03:20:26,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:20:27,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843521721] [2020-07-20 03:20:27,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811971742] [2020-07-20 03:20:27,123 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6b1e3eff No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:27,147 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6b1e3eff issued 2 check-sat command(s) [2020-07-20 03:20:27,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:20:27,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 03:20:27,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:20:29,634 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:20:29,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:20:29,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2020-07-20 03:20:29,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484528046] [2020-07-20 03:20:29,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 03:20:29,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:29,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 03:20:29,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=396, Unknown=1, NotChecked=0, Total=462 [2020-07-20 03:20:29,636 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 22 states. [2020-07-20 03:20:43,969 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 03:20:45,300 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 03:20:47,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:47,747 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2020-07-20 03:20:47,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 03:20:47,751 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2020-07-20 03:20:47,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:47,752 INFO L225 Difference]: With dead ends: 78 [2020-07-20 03:20:47,752 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 03:20:47,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=138, Invalid=911, Unknown=7, NotChecked=0, Total=1056 [2020-07-20 03:20:47,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 03:20:47,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-20 03:20:47,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 03:20:47,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 34 transitions. [2020-07-20 03:20:47,760 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 34 transitions. Word has length 33 [2020-07-20 03:20:47,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:47,761 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 34 transitions. [2020-07-20 03:20:47,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 03:20:47,761 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 34 transitions. [2020-07-20 03:20:47,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 03:20:47,761 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:47,761 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] [2020-07-20 03:20:47,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-20 03:20:47,962 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:47,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:47,963 INFO L82 PathProgramCache]: Analyzing trace with hash -825201876, now seen corresponding path program 1 times [2020-07-20 03:20:47,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:47,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890262983] [2020-07-20 03:20:47,965 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b71dd [2020-07-20 03:20:47,971 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 03:20:47,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [619831785] [2020-07-20 03:20:47,972 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@692e29f1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:48,050 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@692e29f1 issued 4 check-sat command(s) [2020-07-20 03:20:48,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:20:48,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-20 03:20:48,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:20:48,307 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:20:48,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890262983] [2020-07-20 03:20:48,308 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 03:20:48,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619831785] [2020-07-20 03:20:48,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 03:20:48,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-20 03:20:48,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350478747] [2020-07-20 03:20:48,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 03:20:48,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:48,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 03:20:48,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:20:48,310 INFO L87 Difference]: Start difference. First operand 35 states and 34 transitions. Second operand 15 states. [2020-07-20 03:20:48,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:48,704 INFO L93 Difference]: Finished difference Result 35 states and 34 transitions. [2020-07-20 03:20:48,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 03:20:48,705 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-07-20 03:20:48,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:48,706 INFO L225 Difference]: With dead ends: 35 [2020-07-20 03:20:48,706 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 03:20:48,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2020-07-20 03:20:48,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 03:20:48,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 03:20:48,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 03:20:48,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 03:20:48,708 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2020-07-20 03:20:48,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:48,709 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 03:20:48,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 03:20:48,709 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 03:20:48,709 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 03:20:48,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-20 03:20:48,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 03:24:09,056 WARN L193 SmtUtils]: Spent 3.33 m on a formula simplification. DAG size of input: 137 DAG size of output: 72 [2020-07-20 03:24:09,067 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 03:24:09,067 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 03:24:09,067 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 03:24:09,067 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 03:24:09,067 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 03:24:09,067 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 03:24:09,067 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 30 46) the Hoare annotation is: true [2020-07-20 03:24:09,067 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 30 46) no Hoare annotation was computed. [2020-07-20 03:24:09,067 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-07-20 03:24:09,068 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)) [2020-07-20 03:24:09,068 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)) [2020-07-20 03:24:09,068 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 30 46) no Hoare annotation was computed. [2020-07-20 03:24:09,068 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)) [2020-07-20 03:24:09,068 INFO L264 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (= 18 main_~y~0) (= 63 main_~x~0)) [2020-07-20 03:24:09,068 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-07-20 03:24:09,068 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 4 9) the Hoare annotation is: true [2020-07-20 03:24:09,068 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 4 9) no Hoare annotation was computed. [2020-07-20 03:24:09,069 INFO L268 CegarLoopResult]: For program point L6(line 6) no Hoare annotation was computed. [2020-07-20 03:24:09,069 INFO L268 CegarLoopResult]: For program point L5(lines 5 7) no Hoare annotation was computed. [2020-07-20 03:24:09,069 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2020-07-20 03:24:09,069 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 9) no Hoare annotation was computed. [2020-07-20 03:24:09,069 INFO L268 CegarLoopResult]: For program point gcd_testEXIT(lines 10 27) no Hoare annotation was computed. [2020-07-20 03:24:09,069 INFO L268 CegarLoopResult]: For program point L19-2(lines 19 25) no Hoare annotation was computed. [2020-07-20 03:24:09,069 INFO L268 CegarLoopResult]: For program point L13-1(lines 11 27) no Hoare annotation was computed. [2020-07-20 03:24:09,070 INFO L271 CegarLoopResult]: At program point gcd_testENTRY(lines 10 27) the Hoare annotation is: true [2020-07-20 03:24:09,070 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-20 03:24:09,070 INFO L264 CegarLoopResult]: At program point L20-2(lines 19 25) the Hoare annotation is: (let ((.cse0 (<= (div (+ gcd_test_~a (* |gcd_test_#in~a| (- 1))) (- 3)) |gcd_test_#in~b|)) (.cse4 (+ gcd_test_~b gcd_test_~a)) (.cse3 (* 2 gcd_test_~b)) (.cse1 (= gcd_test_~b |gcd_test_#in~b|))) (or (and (<= (+ gcd_test_~b (* 2 gcd_test_~a)) |gcd_test_#in~b|) (<= 0 gcd_test_~b) .cse0) (let ((.cse2 (+ .cse3 gcd_test_~a))) (and .cse1 (<= .cse2 |gcd_test_#in~a|) (<= |gcd_test_#in~a| .cse2))) (and (exists ((gcd_test_~a Int)) (and (<= |gcd_test_#in~b| (+ gcd_test_~b gcd_test_~a)) (<= |gcd_test_#in~b| (div (+ (* gcd_test_~a (- 1)) |gcd_test_#in~a|) 3)))) (<= .cse4 |gcd_test_#in~b|) .cse0) (and .cse1 (<= |gcd_test_#in~b| (div (+ (* gcd_test_~a (- 1)) |gcd_test_#in~a|) 3)) (<= |gcd_test_#in~a| (+ (* 3 gcd_test_~b) gcd_test_~a))) (and (<= |gcd_test_#in~a| 0) (<= |gcd_test_#in~a| gcd_test_~a)) (and .cse1 (<= |gcd_test_#in~a| .cse4) (<= .cse4 |gcd_test_#in~a|)) (and (<= (+ (* 21 |gcd_test_#in~b|) 1) (+ .cse3 (* 6 |gcd_test_#in~a|))) (exists ((v_gcd_test_~a_23 Int)) (and (<= (+ |gcd_test_#in~b| 1) (* 2 v_gcd_test_~a_23)) (<= |gcd_test_#in~b| (div (+ (* v_gcd_test_~a_23 (- 1)) |gcd_test_#in~a|) 3))))) (<= (+ (* 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|)))) [2020-07-20 03:24:09,071 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-07-20 03:24:09,071 INFO L268 CegarLoopResult]: For program point L12-2(lines 11 27) no Hoare annotation was computed. [2020-07-20 03:24:09,071 INFO L268 CegarLoopResult]: For program point gcd_testFINAL(lines 10 27) no Hoare annotation was computed. [2020-07-20 03:24:09,083 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] [2020-07-20 03:24:09,084 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] [2020-07-20 03:24:09,085 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_23,QUANTIFIED] [2020-07-20 03:24:09,086 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_23,QUANTIFIED] [2020-07-20 03:24:09,098 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] [2020-07-20 03:24:09,098 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] [2020-07-20 03:24:09,098 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_23,QUANTIFIED] [2020-07-20 03:24:09,099 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_23,QUANTIFIED] [2020-07-20 03:24:09,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 03:24:09 BoogieIcfgContainer [2020-07-20 03:24:09,102 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 03:24:09,104 INFO L168 Benchmark]: Toolchain (without parser) took 248710.02 ms. Allocated memory was 137.9 MB in the beginning and 276.8 MB in the end (delta: 138.9 MB). Free memory was 101.6 MB in the beginning and 100.9 MB in the end (delta: 701.2 kB). Peak memory consumption was 139.6 MB. Max. memory is 7.1 GB. [2020-07-20 03:24:09,106 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 03:24:09,106 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.43 ms. Allocated memory is still 137.9 MB. Free memory was 101.2 MB in the beginning and 91.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-20 03:24:09,107 INFO L168 Benchmark]: Boogie Preprocessor took 120.70 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.6 MB in the beginning and 180.9 MB in the end (delta: -89.3 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-07-20 03:24:09,108 INFO L168 Benchmark]: RCFGBuilder took 271.08 ms. Allocated memory is still 201.9 MB. Free memory was 180.9 MB in the beginning and 167.3 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-07-20 03:24:09,109 INFO L168 Benchmark]: TraceAbstraction took 248063.01 ms. Allocated memory was 201.9 MB in the beginning and 276.8 MB in the end (delta: 75.0 MB). Free memory was 166.7 MB in the beginning and 100.9 MB in the end (delta: 65.7 MB). Peak memory consumption was 140.7 MB. Max. memory is 7.1 GB. [2020-07-20 03:24:09,112 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 249.43 ms. Allocated memory is still 137.9 MB. Free memory was 101.2 MB in the beginning and 91.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.70 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.6 MB in the beginning and 180.9 MB in the end (delta: -89.3 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 271.08 ms. Allocated memory is still 201.9 MB. Free memory was 180.9 MB in the beginning and 167.3 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 248063.01 ms. Allocated memory was 201.9 MB in the beginning and 276.8 MB in the end (delta: 75.0 MB). Free memory was 166.7 MB in the beginning and 100.9 MB in the end (delta: 65.7 MB). Peak memory consumption was 140.7 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[gcd_test_~a,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_23,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_23,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_23,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_23,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 [2020-07-20 03:24:09,127 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] [2020-07-20 03:24:09,130 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] [2020-07-20 03:24:09,131 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_23,QUANTIFIED] [2020-07-20 03:24:09,131 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_23,QUANTIFIED] [2020-07-20 03:24:09,134 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] [2020-07-20 03:24:09,134 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] [2020-07-20 03:24:09,135 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_23,QUANTIFIED] [2020-07-20 03:24:09,135 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_23,QUANTIFIED] Derived loop invariant: ((((((((((b + 2 * a <= \old(b) && 0 <= b) && (a + \old(a) * -1) / -3 <= \old(b)) || ((b == \old(b) && 2 * b + a <= \old(a)) && \old(a) <= 2 * b + a)) || (((\exists gcd_test_~a : int :: \old(b) <= b + gcd_test_~a && \old(b) <= (gcd_test_~a * -1 + \old(a)) / 3) && b + a <= \old(b)) && (a + \old(a) * -1) / -3 <= \old(b))) || ((b == \old(b) && \old(b) <= (a * -1 + \old(a)) / 3) && \old(a) <= 3 * b + a)) || (\old(a) <= 0 && \old(a) <= a)) || ((b == \old(b) && \old(a) <= b + a) && b + a <= \old(a))) || (21 * \old(b) + 1 <= 2 * b + 6 * \old(a) && (\exists v_gcd_test_~a_23 : int :: \old(b) + 1 <= 2 * v_gcd_test_~a_23 && \old(b) <= (v_gcd_test_~a_23 * -1 + \old(a)) / 3))) || 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: 47.7s, OverallIterations: 14, TraceHistogramMax: 7, AutomataDifference: 27.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 200.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 323 SDtfs, 184 SDslu, 1652 SDs, 0 SdLazy, 1717 SolverSat, 74 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 14.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 405 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 27.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=9, 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, 14 MinimizatonAttempts, 16 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 49 PreInvPairs, 79 NumberOfFragments, 214 HoareAnnotationTreeSize, 49 FomulaSimplifications, 511 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 384 FormulaSimplificationTreeSizeReductionInter, 200.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 16.7s InterpolantComputationTime, 479 NumberOfCodeBlocks, 371 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 461 ConstructedInterpolants, 21 QuantifiedInterpolants, 72393 SizeOfPredicates, 36 NumberOfNonLiveVariables, 551 ConjunctsInSsa, 140 ConjunctsInUnsatCore, 18 InterpolantComputations, 5 PerfectInterpolantSequences, 45/376 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...