/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/geo2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:55:37,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:55:37,197 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:55:37,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 01:55:37,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 01:55:37,212 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 01:55:37,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 01:55:37,216 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 01:55:37,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 01:55:37,222 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 01:55:37,224 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 01:55:37,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 01:55:37,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:55:37,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:55:37,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:55:37,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:55:37,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:55:37,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:55:37,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:55:37,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:55:37,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:55:37,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:55:37,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:55:37,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:55:37,260 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 01:55:37,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:55:37,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:55:37,282 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:55:37,283 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 01:55:37,327 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:55:37,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:55:37,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:55:37,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:55:37,330 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:55:37,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:55:37,330 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:55:37,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:55:37,332 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:55:37,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:55:37,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:55:37,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:55:37,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:55:37,333 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:55:37,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:55:37,333 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:55:37,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:55:37,335 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:55:37,335 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:55:37,335 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:55:37,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:55:37,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:55:37,336 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:55:37,336 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:55:37,337 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:55:37,337 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:55:37,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:55:37,337 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:55:37,337 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:55:37,337 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 01:55:37,676 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:55:37,694 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:55:37,698 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:55:37,699 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:55:37,700 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:55:37,700 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo2.c [2020-07-20 01:55:37,779 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5f5b794d/f8ec2e6a672b41b699b589eb41702ed7/FLAGff64629ad [2020-07-20 01:55:38,245 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:55:38,246 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo2.c [2020-07-20 01:55:38,253 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5f5b794d/f8ec2e6a672b41b699b589eb41702ed7/FLAGff64629ad [2020-07-20 01:55:38,679 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5f5b794d/f8ec2e6a672b41b699b589eb41702ed7 [2020-07-20 01:55:38,692 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:55:38,697 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:55:38,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:55:38,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:55:38,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:55:38,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:55:38" (1/1) ... [2020-07-20 01:55:38,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68339fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:38, skipping insertion in model container [2020-07-20 01:55:38,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:55:38" (1/1) ... [2020-07-20 01:55:38,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:55:38,737 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:55:38,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:55:38,941 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:55:38,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:55:38,971 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:55:38,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:38 WrapperNode [2020-07-20 01:55:38,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:55:38,973 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:55:38,973 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:55:38,973 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:55:38,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:38" (1/1) ... [2020-07-20 01:55:38,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:38" (1/1) ... [2020-07-20 01:55:39,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:38" (1/1) ... [2020-07-20 01:55:39,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:38" (1/1) ... [2020-07-20 01:55:39,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:38" (1/1) ... [2020-07-20 01:55:39,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:38" (1/1) ... [2020-07-20 01:55:39,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:38" (1/1) ... [2020-07-20 01:55:39,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:55:39,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:55:39,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:55:39,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:55:39,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:55:39,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:55:39,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:55:39,155 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 01:55:39,155 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 01:55:39,155 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:55:39,155 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:55:39,155 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 01:55:39,156 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 01:55:39,156 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 01:55:39,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 01:55:39,157 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:55:39,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:55:39,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:55:39,362 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:55:39,363 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 01:55:39,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:55:39 BoogieIcfgContainer [2020-07-20 01:55:39,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:55:39,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:55:39,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:55:39,370 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:55:39,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:55:38" (1/3) ... [2020-07-20 01:55:39,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67040afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:55:39, skipping insertion in model container [2020-07-20 01:55:39,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:38" (2/3) ... [2020-07-20 01:55:39,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67040afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:55:39, skipping insertion in model container [2020-07-20 01:55:39,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:55:39" (3/3) ... [2020-07-20 01:55:39,374 INFO L109 eAbstractionObserver]: Analyzing ICFG geo2.c [2020-07-20 01:55:39,385 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:55:39,394 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:55:39,411 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:55:39,434 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:55:39,434 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:55:39,434 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:55:39,435 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:55:39,435 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:55:39,435 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:55:39,435 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:55:39,435 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:55:39,455 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 01:55:39,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 01:55:39,462 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:55:39,463 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:55:39,463 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:55:39,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:55:39,470 INFO L82 PathProgramCache]: Analyzing trace with hash -64610451, now seen corresponding path program 1 times [2020-07-20 01:55:39,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:55:39,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494913454] [2020-07-20 01:55:39,481 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@642b258b [2020-07-20 01:55:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:55:39,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:55:39,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:55:39,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494913454] [2020-07-20 01:55:39,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:55:39,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 01:55:39,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518742407] [2020-07-20 01:55:39,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 01:55:39,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:55:39,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 01:55:39,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 01:55:39,634 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-20 01:55:39,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:55:39,662 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-07-20 01:55:39,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 01:55:39,663 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 01:55:39,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:55:39,674 INFO L225 Difference]: With dead ends: 35 [2020-07-20 01:55:39,675 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 01:55:39,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 01:55:39,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 01:55:39,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 01:55:39,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 01:55:39,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-20 01:55:39,729 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-07-20 01:55:39,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:55:39,729 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-20 01:55:39,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 01:55:39,730 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-20 01:55:39,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 01:55:39,731 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:55:39,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:55:39,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:55:39,732 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:55:39,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:55:39,732 INFO L82 PathProgramCache]: Analyzing trace with hash -62822991, now seen corresponding path program 1 times [2020-07-20 01:55:39,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:55:39,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073352760] [2020-07-20 01:55:39,733 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@642b258b [2020-07-20 01:55:39,743 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:55:39,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644132796] [2020-07-20 01:55:39,743 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72a2259c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:55:39,807 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72a2259c issued 3 check-sat command(s) [2020-07-20 01:55:39,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:55:39,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 01:55:39,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:55:39,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:55:39,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073352760] [2020-07-20 01:55:39,984 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 01:55:39,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644132796] [2020-07-20 01:55:39,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:55:39,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 01:55:39,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659166299] [2020-07-20 01:55:39,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:55:39,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:55:39,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:55:39,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:55:39,988 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-07-20 01:55:40,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:55:40,060 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-07-20 01:55:40,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 01:55:40,061 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-20 01:55:40,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:55:40,062 INFO L225 Difference]: With dead ends: 25 [2020-07-20 01:55:40,062 INFO L226 Difference]: Without dead ends: 22 [2020-07-20 01:55:40,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:55:40,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-20 01:55:40,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-20 01:55:40,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-20 01:55:40,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-20 01:55:40,073 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-07-20 01:55:40,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:55:40,073 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-20 01:55:40,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:55:40,074 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-20 01:55:40,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 01:55:40,075 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:55:40,075 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:55:40,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 01:55:40,291 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:55:40,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:55:40,293 INFO L82 PathProgramCache]: Analyzing trace with hash 50868238, now seen corresponding path program 1 times [2020-07-20 01:55:40,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:55:40,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558126287] [2020-07-20 01:55:40,295 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@642b258b [2020-07-20 01:55:40,303 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:55:40,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120323000] [2020-07-20 01:55:40,304 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3d523a64 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:55:40,351 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3d523a64 issued 4 check-sat command(s) [2020-07-20 01:55:40,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:55:40,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 01:55:40,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:55:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:55:40,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558126287] [2020-07-20 01:55:40,460 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 01:55:40,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120323000] [2020-07-20 01:55:40,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:55:40,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-20 01:55:40,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763123105] [2020-07-20 01:55:40,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 01:55:40,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:55:40,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 01:55:40,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:55:40,464 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-07-20 01:55:40,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:55:40,551 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-07-20 01:55:40,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 01:55:40,552 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-07-20 01:55:40,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:55:40,553 INFO L225 Difference]: With dead ends: 32 [2020-07-20 01:55:40,553 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 01:55:40,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 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 01:55:40,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 01:55:40,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-20 01:55:40,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 01:55:40,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-07-20 01:55:40,563 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2020-07-20 01:55:40,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:55:40,563 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-07-20 01:55:40,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 01:55:40,564 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-07-20 01:55:40,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 01:55:40,565 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:55:40,565 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:55:40,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:55:40,779 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:55:40,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:55:40,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1538749201, now seen corresponding path program 2 times [2020-07-20 01:55:40,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:55:40,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795838854] [2020-07-20 01:55:40,781 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@642b258b [2020-07-20 01:55:40,787 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:55:40,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031133819] [2020-07-20 01:55:40,788 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2df0c857 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:55:40,913 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2df0c857 issued 4 check-sat command(s) [2020-07-20 01:55:40,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:55:40,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 01:55:40,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:55:45,466 WARN L193 SmtUtils]: Spent 2.46 s on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 01:55:45,578 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 01:55:45,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795838854] [2020-07-20 01:55:45,579 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 01:55:45,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031133819] [2020-07-20 01:55:45,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:55:45,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-20 01:55:45,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510039280] [2020-07-20 01:55:45,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 01:55:45,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:55:45,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 01:55:45,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=70, Unknown=1, NotChecked=0, Total=90 [2020-07-20 01:55:45,582 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 10 states. [2020-07-20 01:56:01,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:56:01,237 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-07-20 01:56:01,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 01:56:01,238 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-07-20 01:56:01,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:56:01,239 INFO L225 Difference]: With dead ends: 39 [2020-07-20 01:56:01,239 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 01:56:01,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=30, Invalid=101, Unknown=1, NotChecked=0, Total=132 [2020-07-20 01:56:01,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 01:56:01,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-20 01:56:01,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 01:56:01,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-07-20 01:56:01,249 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 24 [2020-07-20 01:56:01,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:56:01,250 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-07-20 01:56:01,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 01:56:01,250 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-07-20 01:56:01,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 01:56:01,251 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:56:01,251 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:56:01,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:56:01,452 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:56:01,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:56:01,453 INFO L82 PathProgramCache]: Analyzing trace with hash -854689591, now seen corresponding path program 1 times [2020-07-20 01:56:01,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:56:01,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165785150] [2020-07-20 01:56:01,454 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@642b258b [2020-07-20 01:56:01,471 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:56:01,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1682194799] [2020-07-20 01:56:01,471 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6cbc5fe1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:56:01,571 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6cbc5fe1 issued 4 check-sat command(s) [2020-07-20 01:56:01,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:56:01,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 01:56:01,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:56:01,616 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:56:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 01:56:01,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165785150] [2020-07-20 01:56:01,764 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 01:56:01,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682194799] [2020-07-20 01:56:01,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:56:01,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-20 01:56:01,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407489728] [2020-07-20 01:56:01,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 01:56:01,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:56:01,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 01:56:01,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:56:01,767 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 7 states. [2020-07-20 01:56:03,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:56:03,953 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-07-20 01:56:03,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 01:56:03,955 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-07-20 01:56:03,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:56:03,958 INFO L225 Difference]: With dead ends: 41 [2020-07-20 01:56:03,958 INFO L226 Difference]: Without dead ends: 34 [2020-07-20 01:56:03,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:56:03,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-20 01:56:03,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-07-20 01:56:03,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 01:56:03,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-07-20 01:56:03,973 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 30 [2020-07-20 01:56:03,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:56:03,974 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-07-20 01:56:03,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 01:56:03,974 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-07-20 01:56:03,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 01:56:03,977 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:56:03,977 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:56:04,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:56:04,193 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:56:04,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:56:04,194 INFO L82 PathProgramCache]: Analyzing trace with hash -695576914, now seen corresponding path program 3 times [2020-07-20 01:56:04,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:56:04,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941942165] [2020-07-20 01:56:04,195 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@642b258b [2020-07-20 01:56:04,202 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:56:04,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811132077] [2020-07-20 01:56:04,203 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7515f2c8 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