/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 BIGGEST_EQUIVALENCE_CLASS --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/ps2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 06:18:50,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 06:18:50,359 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 06:18:50,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 06:18:50,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 06:18:50,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 06:18:50,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 06:18:50,396 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 06:18:50,398 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 06:18:50,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 06:18:50,399 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 06:18:50,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 06:18:50,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 06:18:50,405 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 06:18:50,407 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 06:18:50,409 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 06:18:50,411 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 06:18:50,412 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 06:18:50,414 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 06:18:50,421 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 06:18:50,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 06:18:50,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 06:18:50,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 06:18:50,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 06:18:50,432 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 06:18:50,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 06:18:50,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 06:18:50,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 06:18:50,451 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 06:18:50,477 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 06:18:50,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 06:18:50,478 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 06:18:50,479 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 06:18:50,479 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 06:18:50,479 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 06:18:50,479 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 06:18:50,479 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 06:18:50,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 06:18:50,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 06:18:50,480 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 06:18:50,480 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 06:18:50,480 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 06:18:50,481 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 06:18:50,481 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 06:18:50,481 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 06:18:50,481 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 06:18:50,482 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 06:18:50,482 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 06:18:50,482 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 06:18:50,482 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 06:18:50,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:18:50,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 06:18:50,483 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 06:18:50,483 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 06:18:50,483 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 06:18:50,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 06:18:50,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 06:18:50,484 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 06:18:50,484 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS 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 06:18:50,751 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 06:18:50,764 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 06:18:50,768 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 06:18:50,769 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 06:18:50,770 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 06:18:50,770 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps2.c [2020-07-20 06:18:50,852 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b575933f8/443ba984cc854adc9df872f60bcba775/FLAG31f07e6f2 [2020-07-20 06:18:51,283 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 06:18:51,284 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps2.c [2020-07-20 06:18:51,292 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b575933f8/443ba984cc854adc9df872f60bcba775/FLAG31f07e6f2 [2020-07-20 06:18:51,620 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b575933f8/443ba984cc854adc9df872f60bcba775 [2020-07-20 06:18:51,629 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 06:18:51,631 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 06:18:51,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 06:18:51,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 06:18:51,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 06:18:51,639 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:18:51" (1/1) ... [2020-07-20 06:18:51,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56d656f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:51, skipping insertion in model container [2020-07-20 06:18:51,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:18:51" (1/1) ... [2020-07-20 06:18:51,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 06:18:51,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 06:18:51,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:18:51,842 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 06:18:51,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:18:51,876 INFO L208 MainTranslator]: Completed translation [2020-07-20 06:18:51,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:51 WrapperNode [2020-07-20 06:18:51,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 06:18:51,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 06:18:51,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 06:18:51,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 06:18:51,893 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:51" (1/1) ... [2020-07-20 06:18:51,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:51" (1/1) ... [2020-07-20 06:18:51,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:51" (1/1) ... [2020-07-20 06:18:51,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:51" (1/1) ... [2020-07-20 06:18:51,902 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:51" (1/1) ... [2020-07-20 06:18:51,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:51" (1/1) ... [2020-07-20 06:18:51,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:51" (1/1) ... [2020-07-20 06:18:51,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 06:18:51,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 06:18:51,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 06:18:51,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 06:18:51,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:51" (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 06:18:52,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 06:18:52,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 06:18:52,058 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 06:18:52,058 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 06:18:52,058 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 06:18:52,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 06:18:52,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 06:18:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 06:18:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 06:18:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 06:18:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 06:18:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 06:18:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 06:18:52,240 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 06:18:52,240 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 06:18:52,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:18:52 BoogieIcfgContainer [2020-07-20 06:18:52,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 06:18:52,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 06:18:52,247 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 06:18:52,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 06:18:52,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:18:51" (1/3) ... [2020-07-20 06:18:52,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@609d810b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:18:52, skipping insertion in model container [2020-07-20 06:18:52,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:51" (2/3) ... [2020-07-20 06:18:52,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@609d810b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:18:52, skipping insertion in model container [2020-07-20 06:18:52,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:18:52" (3/3) ... [2020-07-20 06:18:52,254 INFO L109 eAbstractionObserver]: Analyzing ICFG ps2.c [2020-07-20 06:18:52,266 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 06:18:52,276 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 06:18:52,293 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 06:18:52,322 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 06:18:52,322 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 06:18:52,322 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 06:18:52,323 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 06:18:52,323 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 06:18:52,323 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 06:18:52,323 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 06:18:52,323 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 06:18:52,353 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 06:18:52,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 06:18:52,362 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:18:52,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:18:52,364 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:18:52,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:18:52,372 INFO L82 PathProgramCache]: Analyzing trace with hash -64610451, now seen corresponding path program 1 times [2020-07-20 06:18:52,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:18:52,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374238993] [2020-07-20 06:18:52,381 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:18:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:18:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:18:52,508 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 06:18:52,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374238993] [2020-07-20 06:18:52,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:18:52,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 06:18:52,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874497903] [2020-07-20 06:18:52,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 06:18:52,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:18:52,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 06:18:52,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 06:18:52,529 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-20 06:18:52,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:18:52,555 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-07-20 06:18:52,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 06:18:52,556 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 06:18:52,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:18:52,567 INFO L225 Difference]: With dead ends: 35 [2020-07-20 06:18:52,567 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 06:18:52,571 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 06:18:52,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 06:18:52,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 06:18:52,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 06:18:52,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-20 06:18:52,614 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-07-20 06:18:52,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:18:52,614 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-20 06:18:52,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 06:18:52,615 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-20 06:18:52,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 06:18:52,615 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:18:52,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:18:52,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 06:18:52,616 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:18:52,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:18:52,617 INFO L82 PathProgramCache]: Analyzing trace with hash -62822991, now seen corresponding path program 1 times [2020-07-20 06:18:52,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:18:52,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136694852] [2020-07-20 06:18:52,618 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:18:52,625 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:18:52,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857131832] [2020-07-20 06:18:52,626 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@63634224 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:18:52,680 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@63634224 issued 3 check-sat command(s) [2020-07-20 06:18:52,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:18:52,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 06:18:52,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:18:52,807 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 06:18:52,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136694852] [2020-07-20 06:18:52,808 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:18:52,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857131832] [2020-07-20 06:18:52,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:18:52,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 06:18:52,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985452311] [2020-07-20 06:18:52,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 06:18:52,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:18:52,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 06:18:52,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:18:52,813 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-07-20 06:18:52,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:18:52,875 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-07-20 06:18:52,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 06:18:52,876 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-20 06:18:52,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:18:52,878 INFO L225 Difference]: With dead ends: 25 [2020-07-20 06:18:52,878 INFO L226 Difference]: Without dead ends: 22 [2020-07-20 06:18:52,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 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 06:18:52,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-20 06:18:52,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-20 06:18:52,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-20 06:18:52,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-20 06:18:52,887 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-07-20 06:18:52,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:18:52,888 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-20 06:18:52,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 06:18:52,888 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-20 06:18:52,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 06:18:52,889 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:18:52,890 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:18:53,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 06:18:53,105 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:18:53,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:18:53,106 INFO L82 PathProgramCache]: Analyzing trace with hash 50868238, now seen corresponding path program 1 times [2020-07-20 06:18:53,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:18:53,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907607927] [2020-07-20 06:18:53,107 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:18:53,114 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:18:53,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1726760864] [2020-07-20 06:18:53,115 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48a37ab2 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 06:18:53,159 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48a37ab2 issued 4 check-sat command(s) [2020-07-20 06:18:53,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:18:53,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 06:18:53,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:18:53,227 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 06:18:53,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907607927] [2020-07-20 06:18:53,228 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:18:53,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726760864] [2020-07-20 06:18:53,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:18:53,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-20 06:18:53,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502120024] [2020-07-20 06:18:53,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 06:18:53,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:18:53,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 06:18:53,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 06:18:53,231 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-07-20 06:18:53,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:18:53,302 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-07-20 06:18:53,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 06:18:53,303 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-07-20 06:18:53,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:18:53,304 INFO L225 Difference]: With dead ends: 32 [2020-07-20 06:18:53,305 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 06:18:53,305 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 06:18:53,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 06:18:53,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-20 06:18:53,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 06:18:53,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-07-20 06:18:53,314 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2020-07-20 06:18:53,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:18:53,314 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-07-20 06:18:53,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 06:18:53,315 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-07-20 06:18:53,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 06:18:53,316 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:18:53,316 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:18:53,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:18:53,532 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:18:53,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:18:53,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1538749201, now seen corresponding path program 2 times [2020-07-20 06:18:53,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:18:53,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358865709] [2020-07-20 06:18:53,534 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:18:53,542 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:18:53,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542797097] [2020-07-20 06:18:53,543 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39809c53 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:18:53,599 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39809c53 issued 4 check-sat command(s) [2020-07-20 06:18:53,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:18:53,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 06:18:53,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:18:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 06:18:53,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358865709] [2020-07-20 06:18:53,670 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:18:53,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542797097] [2020-07-20 06:18:53,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:18:53,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-20 06:18:53,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541124704] [2020-07-20 06:18:53,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 06:18:53,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:18:53,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 06:18:53,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 06:18:53,673 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 7 states. [2020-07-20 06:18:53,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:18:53,759 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-07-20 06:18:53,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 06:18:53,760 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-20 06:18:53,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:18:53,762 INFO L225 Difference]: With dead ends: 39 [2020-07-20 06:18:53,762 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 06:18:53,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 06:18:53,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 06:18:53,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 06:18:53,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 06:18:53,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-20 06:18:53,772 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 24 [2020-07-20 06:18:53,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:18:53,773 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-20 06:18:53,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 06:18:53,773 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-20 06:18:53,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 06:18:53,775 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:18:53,775 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:18:53,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:18:53,990 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:18:53,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:18:53,991 INFO L82 PathProgramCache]: Analyzing trace with hash -695576914, now seen corresponding path program 3 times [2020-07-20 06:18:53,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:18:53,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77343434] [2020-07-20 06:18:53,993 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:18:54,009 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:18:54,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211423057] [2020-07-20 06:18:54,009 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5d4c581f 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 06:18:54,050 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5d4c581f issued 4 check-sat command(s) [2020-07-20 06:18:54,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:18:54,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 06:18:54,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:18:54,154 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 06:18:54,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77343434] [2020-07-20 06:18:54,155 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:18:54,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211423057] [2020-07-20 06:18:54,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:18:54,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 06:18:54,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317984942] [2020-07-20 06:18:54,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 06:18:54,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:18:54,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 06:18:54,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-20 06:18:54,157 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 8 states. [2020-07-20 06:18:54,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:18:54,258 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-07-20 06:18:54,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 06:18:54,258 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-07-20 06:18:54,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:18:54,260 INFO L225 Difference]: With dead ends: 46 [2020-07-20 06:18:54,260 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 06:18:54,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-20 06:18:54,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 06:18:54,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-20 06:18:54,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 06:18:54,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-07-20 06:18:54,270 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 31 [2020-07-20 06:18:54,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:18:54,270 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-07-20 06:18:54,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 06:18:54,271 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-07-20 06:18:54,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 06:18:54,272 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:18:54,272 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:18:54,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:18:54,488 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:18:54,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:18:54,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1264228465, now seen corresponding path program 4 times [2020-07-20 06:18:54,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:18:54,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539294282] [2020-07-20 06:18:54,490 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:18:54,496 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:18:54,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [708430625] [2020-07-20 06:18:54,497 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5df92a46 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:18:54,544 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5df92a46 issued 4 check-sat command(s) [2020-07-20 06:18:54,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:18:54,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 06:18:54,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:18:54,631 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-20 06:18:54,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539294282] [2020-07-20 06:18:54,631 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:18:54,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708430625] [2020-07-20 06:18:54,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:18:54,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 06:18:54,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960607203] [2020-07-20 06:18:54,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 06:18:54,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:18:54,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 06:18:54,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 06:18:54,634 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 9 states. [2020-07-20 06:18:54,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:18:54,755 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-07-20 06:18:54,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 06:18:54,756 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-07-20 06:18:54,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:18:54,757 INFO L225 Difference]: With dead ends: 53 [2020-07-20 06:18:54,757 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 06:18:54,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-20 06:18:54,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 06:18:54,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-07-20 06:18:54,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 06:18:54,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-07-20 06:18:54,767 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 38 [2020-07-20 06:18:54,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:18:54,767 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-07-20 06:18:54,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 06:18:54,768 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-07-20 06:18:54,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 06:18:54,769 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:18:54,769 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:18:54,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 06:18:54,984 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:18:54,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:18:54,985 INFO L82 PathProgramCache]: Analyzing trace with hash 427058510, now seen corresponding path program 5 times [2020-07-20 06:18:54,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:18:54,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821042301] [2020-07-20 06:18:54,986 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:18:54,991 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:18:54,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267188] [2020-07-20 06:18:54,992 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7683997d 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 06:18:55,044 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7683997d issued 4 check-sat command(s) [2020-07-20 06:18:55,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:18:55,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 06:18:55,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:18:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 06:18:55,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821042301] [2020-07-20 06:18:55,162 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:18:55,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267188] [2020-07-20 06:18:55,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:18:55,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-20 06:18:55,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515421487] [2020-07-20 06:18:55,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 06:18:55,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:18:55,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 06:18:55,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-07-20 06:18:55,164 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 10 states. [2020-07-20 06:18:55,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:18:55,321 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-07-20 06:18:55,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 06:18:55,322 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-07-20 06:18:55,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:18:55,323 INFO L225 Difference]: With dead ends: 60 [2020-07-20 06:18:55,323 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 06:18:55,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-07-20 06:18:55,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 06:18:55,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-20 06:18:55,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 06:18:55,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-20 06:18:55,334 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 45 [2020-07-20 06:18:55,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:18:55,334 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-20 06:18:55,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 06:18:55,335 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-20 06:18:55,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 06:18:55,336 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:18:55,336 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:18:55,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:18:55,552 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:18:55,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:18:55,553 INFO L82 PathProgramCache]: Analyzing trace with hash 174118353, now seen corresponding path program 6 times [2020-07-20 06:18:55,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:18:55,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958412755] [2020-07-20 06:18:55,554 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:18:55,560 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:18:55,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91729678] [2020-07-20 06:18:55,561 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@60f63f09 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:18:55,611 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@60f63f09 issued 4 check-sat command(s) [2020-07-20 06:18:55,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:18:55,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-20 06:18:55,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:18:55,761 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 12 proven. 57 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-20 06:18:55,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958412755] [2020-07-20 06:18:55,762 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:18:55,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91729678] [2020-07-20 06:18:55,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:18:55,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-20 06:18:55,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130936460] [2020-07-20 06:18:55,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 06:18:55,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:18:55,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 06:18:55,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-07-20 06:18:55,764 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 11 states. [2020-07-20 06:18:55,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:18:55,953 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2020-07-20 06:18:55,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 06:18:55,954 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-07-20 06:18:55,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:18:55,955 INFO L225 Difference]: With dead ends: 67 [2020-07-20 06:18:55,955 INFO L226 Difference]: Without dead ends: 64 [2020-07-20 06:18:55,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-07-20 06:18:55,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-20 06:18:55,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-07-20 06:18:55,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 06:18:55,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-07-20 06:18:55,966 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 52 [2020-07-20 06:18:55,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:18:55,966 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-07-20 06:18:55,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 06:18:55,966 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-07-20 06:18:55,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-07-20 06:18:55,968 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:18:55,968 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:18:56,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:18:56,184 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:18:56,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:18:56,185 INFO L82 PathProgramCache]: Analyzing trace with hash 600857582, now seen corresponding path program 7 times [2020-07-20 06:18:56,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:18:56,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466627598] [2020-07-20 06:18:56,186 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:18:56,191 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:18:56,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438624741] [2020-07-20 06:18:56,192 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48cab7b0 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 06:18:56,240 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48cab7b0 issued 4 check-sat command(s) [2020-07-20 06:18:56,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:18:56,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-20 06:18:56,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:18:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 14 proven. 77 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-20 06:18:56,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466627598] [2020-07-20 06:18:56,417 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:18:56,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438624741] [2020-07-20 06:18:56,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:18:56,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-20 06:18:56,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513014101] [2020-07-20 06:18:56,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 06:18:56,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:18:56,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 06:18:56,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-07-20 06:18:56,427 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 12 states. [2020-07-20 06:18:56,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:18:56,643 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-07-20 06:18:56,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 06:18:56,644 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2020-07-20 06:18:56,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:18:56,645 INFO L225 Difference]: With dead ends: 74 [2020-07-20 06:18:56,645 INFO L226 Difference]: Without dead ends: 71 [2020-07-20 06:18:56,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-07-20 06:18:56,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-20 06:18:56,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-07-20 06:18:56,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-20 06:18:56,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-07-20 06:18:56,656 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 59 [2020-07-20 06:18:56,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:18:56,656 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-07-20 06:18:56,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 06:18:56,657 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-07-20 06:18:56,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-20 06:18:56,658 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:18:56,658 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:18:56,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-20 06:18:56,875 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:18:56,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:18:56,876 INFO L82 PathProgramCache]: Analyzing trace with hash 25176881, now seen corresponding path program 8 times [2020-07-20 06:18:56,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:18:56,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666815662] [2020-07-20 06:18:56,877 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:18:56,882 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:18:56,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850037147] [2020-07-20 06:18:56,883 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5881f768 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:18:56,931 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5881f768 issued 4 check-sat command(s) [2020-07-20 06:18:56,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:18:56,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-20 06:18:56,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:18:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 16 proven. 100 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-07-20 06:18:57,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666815662] [2020-07-20 06:18:57,121 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:18:57,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850037147] [2020-07-20 06:18:57,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:18:57,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-20 06:18:57,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784213502] [2020-07-20 06:18:57,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 06:18:57,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:18:57,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 06:18:57,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-07-20 06:18:57,123 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 13 states. [2020-07-20 06:18:57,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:18:57,370 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-07-20 06:18:57,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 06:18:57,371 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-07-20 06:18:57,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:18:57,372 INFO L225 Difference]: With dead ends: 81 [2020-07-20 06:18:57,372 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 06:18:57,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-07-20 06:18:57,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 06:18:57,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-07-20 06:18:57,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-20 06:18:57,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-07-20 06:18:57,383 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 66 [2020-07-20 06:18:57,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:18:57,383 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-07-20 06:18:57,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 06:18:57,383 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-07-20 06:18:57,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-20 06:18:57,385 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:18:57,385 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:18:57,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:18:57,589 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:18:57,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:18:57,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1948793486, now seen corresponding path program 9 times [2020-07-20 06:18:57,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:18:57,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188018847] [2020-07-20 06:18:57,591 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:18:57,597 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:18:57,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1181899653] [2020-07-20 06:18:57,597 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@57293cb5 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 06:18:57,666 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@57293cb5 issued 4 check-sat command(s) [2020-07-20 06:18:57,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:18:57,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 43 conjunts are in the unsatisfiable core [2020-07-20 06:18:57,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:18:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 18 proven. 126 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-07-20 06:18:57,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188018847] [2020-07-20 06:18:57,874 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:18:57,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181899653] [2020-07-20 06:18:57,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:18:57,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-20 06:18:57,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829959211] [2020-07-20 06:18:57,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 06:18:57,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:18:57,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 06:18:57,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-07-20 06:18:57,876 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 14 states. [2020-07-20 06:18:58,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:18:58,152 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-07-20 06:18:58,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 06:18:58,153 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 73 [2020-07-20 06:18:58,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:18:58,154 INFO L225 Difference]: With dead ends: 88 [2020-07-20 06:18:58,155 INFO L226 Difference]: Without dead ends: 85 [2020-07-20 06:18:58,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-07-20 06:18:58,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-20 06:18:58,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-07-20 06:18:58,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-20 06:18:58,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-07-20 06:18:58,165 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 73 [2020-07-20 06:18:58,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:18:58,166 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-07-20 06:18:58,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 06:18:58,166 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-07-20 06:18:58,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-20 06:18:58,168 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:18:58,168 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:18:58,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:18:58,381 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:18:58,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:18:58,382 INFO L82 PathProgramCache]: Analyzing trace with hash 586061969, now seen corresponding path program 10 times [2020-07-20 06:18:58,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:18:58,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604377378] [2020-07-20 06:18:58,383 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:18:58,388 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:18:58,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550408052] [2020-07-20 06:18:58,389 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28c6a5dc No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:18:58,438 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28c6a5dc issued 4 check-sat command(s) [2020-07-20 06:18:58,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:18:58,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-20 06:18:58,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:18:58,676 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-07-20 06:18:58,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604377378] [2020-07-20 06:18:58,676 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:18:58,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550408052] [2020-07-20 06:18:58,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:18:58,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-20 06:18:58,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565248552] [2020-07-20 06:18:58,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 06:18:58,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:18:58,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 06:18:58,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-07-20 06:18:58,682 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 15 states. [2020-07-20 06:18:59,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:18:59,003 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2020-07-20 06:18:59,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 06:18:59,004 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 80 [2020-07-20 06:18:59,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:18:59,005 INFO L225 Difference]: With dead ends: 95 [2020-07-20 06:18:59,005 INFO L226 Difference]: Without dead ends: 92 [2020-07-20 06:18:59,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-07-20 06:18:59,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-20 06:18:59,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-07-20 06:18:59,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-07-20 06:18:59,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2020-07-20 06:18:59,016 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 80 [2020-07-20 06:18:59,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:18:59,017 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2020-07-20 06:18:59,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 06:18:59,017 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2020-07-20 06:18:59,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-07-20 06:18:59,018 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:18:59,018 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:18:59,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-20 06:18:59,232 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:18:59,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:18:59,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1334182190, now seen corresponding path program 11 times [2020-07-20 06:18:59,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:18:59,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316191212] [2020-07-20 06:18:59,233 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:18:59,238 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:18:59,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864962746] [2020-07-20 06:18:59,239 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2cdfdbbf 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 06:18:59,295 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2cdfdbbf issued 4 check-sat command(s) [2020-07-20 06:18:59,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:18:59,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-20 06:18:59,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:18:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 22 proven. 187 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-20 06:18:59,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316191212] [2020-07-20 06:18:59,642 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:18:59,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864962746] [2020-07-20 06:18:59,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:18:59,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-07-20 06:18:59,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903965576] [2020-07-20 06:18:59,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 06:18:59,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:18:59,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 06:18:59,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-07-20 06:18:59,645 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 16 states. [2020-07-20 06:19:00,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:19:00,057 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-07-20 06:19:00,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 06:19:00,059 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-07-20 06:19:00,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:19:00,061 INFO L225 Difference]: With dead ends: 102 [2020-07-20 06:19:00,061 INFO L226 Difference]: Without dead ends: 99 [2020-07-20 06:19:00,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-07-20 06:19:00,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-20 06:19:00,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-07-20 06:19:00,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-20 06:19:00,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-07-20 06:19:00,081 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 87 [2020-07-20 06:19:00,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:19:00,081 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-07-20 06:19:00,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 06:19:00,082 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-07-20 06:19:00,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-20 06:19:00,083 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:19:00,090 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:19:00,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-20 06:19:00,303 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:19:00,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:19:00,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1247944177, now seen corresponding path program 12 times [2020-07-20 06:19:00,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:19:00,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332911258] [2020-07-20 06:19:00,305 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:19:00,310 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:19:00,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1181248348] [2020-07-20 06:19:00,311 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ea29d65 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:19:00,364 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ea29d65 issued 4 check-sat command(s) [2020-07-20 06:19:00,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:19:00,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 55 conjunts are in the unsatisfiable core [2020-07-20 06:19:00,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:19:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 24 proven. 222 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-07-20 06:19:00,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332911258] [2020-07-20 06:19:00,752 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:19:00,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181248348] [2020-07-20 06:19:00,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:19:00,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-20 06:19:00,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005116757] [2020-07-20 06:19:00,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 06:19:00,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:19:00,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 06:19:00,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-07-20 06:19:00,754 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 17 states. [2020-07-20 06:19:01,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:19:01,199 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2020-07-20 06:19:01,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 06:19:01,199 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 94 [2020-07-20 06:19:01,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:19:01,201 INFO L225 Difference]: With dead ends: 109 [2020-07-20 06:19:01,201 INFO L226 Difference]: Without dead ends: 106 [2020-07-20 06:19:01,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-07-20 06:19:01,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-07-20 06:19:01,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-07-20 06:19:01,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-20 06:19:01,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2020-07-20 06:19:01,212 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 94 [2020-07-20 06:19:01,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:19:01,213 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2020-07-20 06:19:01,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 06:19:01,213 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2020-07-20 06:19:01,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-07-20 06:19:01,214 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:19:01,214 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:19:01,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-20 06:19:01,430 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:19:01,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:19:01,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1634971598, now seen corresponding path program 13 times [2020-07-20 06:19:01,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:19:01,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132436594] [2020-07-20 06:19:01,432 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:19:01,438 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:19:01,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1488790281] [2020-07-20 06:19:01,438 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49d5ac14 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:19:01,503 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49d5ac14 issued 4 check-sat command(s) [2020-07-20 06:19:01,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:19:01,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 59 conjunts are in the unsatisfiable core [2020-07-20 06:19:01,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:19:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 26 proven. 260 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-07-20 06:19:01,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132436594] [2020-07-20 06:19:01,963 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:19:01,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488790281] [2020-07-20 06:19:01,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:19:01,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-20 06:19:01,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828759446] [2020-07-20 06:19:01,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 06:19:01,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:19:01,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 06:19:01,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-07-20 06:19:01,966 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 18 states. [2020-07-20 06:19:02,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:19:02,503 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2020-07-20 06:19:02,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 06:19:02,506 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 101 [2020-07-20 06:19:02,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:19:02,508 INFO L225 Difference]: With dead ends: 116 [2020-07-20 06:19:02,508 INFO L226 Difference]: Without dead ends: 113 [2020-07-20 06:19:02,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-07-20 06:19:02,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-07-20 06:19:02,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-07-20 06:19:02,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-07-20 06:19:02,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2020-07-20 06:19:02,530 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 101 [2020-07-20 06:19:02,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:19:02,531 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2020-07-20 06:19:02,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 06:19:02,531 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2020-07-20 06:19:02,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-20 06:19:02,533 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:19:02,533 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:19:02,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:19:02,744 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:19:02,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:19:02,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1659847855, now seen corresponding path program 14 times [2020-07-20 06:19:02,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:19:02,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819849913] [2020-07-20 06:19:02,745 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:19:02,751 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:19:02,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155701680] [2020-07-20 06:19:02,751 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4a6547e5 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:19:02,810 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4a6547e5 issued 4 check-sat command(s) [2020-07-20 06:19:02,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:19:02,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-20 06:19:02,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:19:03,291 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 28 proven. 301 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-20 06:19:03,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819849913] [2020-07-20 06:19:03,292 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:19:03,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155701680] [2020-07-20 06:19:03,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:19:03,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-07-20 06:19:03,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882969256] [2020-07-20 06:19:03,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 06:19:03,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:19:03,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 06:19:03,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-07-20 06:19:03,294 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 19 states. [2020-07-20 06:19:03,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:19:03,885 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2020-07-20 06:19:03,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 06:19:03,886 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 108 [2020-07-20 06:19:03,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:19:03,887 INFO L225 Difference]: With dead ends: 123 [2020-07-20 06:19:03,887 INFO L226 Difference]: Without dead ends: 120 [2020-07-20 06:19:03,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-07-20 06:19:03,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-07-20 06:19:03,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-07-20 06:19:03,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-20 06:19:03,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2020-07-20 06:19:03,897 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 108 [2020-07-20 06:19:03,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:19:03,897 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2020-07-20 06:19:03,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 06:19:03,897 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2020-07-20 06:19:03,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-07-20 06:19:03,899 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:19:03,899 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:19:04,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-20 06:19:04,114 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:19:04,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:19:04,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1543194222, now seen corresponding path program 15 times [2020-07-20 06:19:04,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:19:04,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542001900] [2020-07-20 06:19:04,116 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:19:04,120 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:19:04,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2003787355] [2020-07-20 06:19:04,121 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7fe9239a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:19:04,190 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7fe9239a issued 4 check-sat command(s) [2020-07-20 06:19:04,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:19:04,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 67 conjunts are in the unsatisfiable core [2020-07-20 06:19:04,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:19:04,813 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 30 proven. 345 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-07-20 06:19:04,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542001900] [2020-07-20 06:19:04,813 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:19:04,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003787355] [2020-07-20 06:19:04,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:19:04,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-07-20 06:19:04,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048389108] [2020-07-20 06:19:04,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 06:19:04,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:19:04,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 06:19:04,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-07-20 06:19:04,815 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 20 states. [2020-07-20 06:19:05,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:19:05,593 INFO L93 Difference]: Finished difference Result 130 states and 132 transitions. [2020-07-20 06:19:05,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 06:19:05,593 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 115 [2020-07-20 06:19:05,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:19:05,595 INFO L225 Difference]: With dead ends: 130 [2020-07-20 06:19:05,595 INFO L226 Difference]: Without dead ends: 127 [2020-07-20 06:19:05,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-07-20 06:19:05,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-20 06:19:05,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-07-20 06:19:05,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-07-20 06:19:05,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2020-07-20 06:19:05,611 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 115 [2020-07-20 06:19:05,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:19:05,611 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2020-07-20 06:19:05,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 06:19:05,612 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2020-07-20 06:19:05,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-20 06:19:05,614 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:19:05,614 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:19:05,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-20 06:19:05,830 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:19:05,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:19:05,830 INFO L82 PathProgramCache]: Analyzing trace with hash -374312783, now seen corresponding path program 16 times [2020-07-20 06:19:05,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:19:05,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358554603] [2020-07-20 06:19:05,831 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:19:05,835 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:19:05,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862936445] [2020-07-20 06:19:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2fcf5a6d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:19:05,910 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2fcf5a6d issued 4 check-sat command(s) [2020-07-20 06:19:05,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:19:05,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 71 conjunts are in the unsatisfiable core [2020-07-20 06:19:05,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:19:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 32 proven. 392 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2020-07-20 06:19:06,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358554603] [2020-07-20 06:19:06,645 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:19:06,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862936445] [2020-07-20 06:19:06,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:19:06,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-20 06:19:06,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394545543] [2020-07-20 06:19:06,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 06:19:06,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:19:06,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 06:19:06,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-07-20 06:19:06,647 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 21 states. [2020-07-20 06:19:07,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:19:07,505 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2020-07-20 06:19:07,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 06:19:07,506 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 122 [2020-07-20 06:19:07,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:19:07,508 INFO L225 Difference]: With dead ends: 137 [2020-07-20 06:19:07,508 INFO L226 Difference]: Without dead ends: 134 [2020-07-20 06:19:07,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-07-20 06:19:07,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-20 06:19:07,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2020-07-20 06:19:07,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-20 06:19:07,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2020-07-20 06:19:07,518 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 122 [2020-07-20 06:19:07,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:19:07,519 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2020-07-20 06:19:07,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 06:19:07,519 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2020-07-20 06:19:07,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-07-20 06:19:07,520 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:19:07,521 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:19:07,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-20 06:19:07,736 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:19:07,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:19:07,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1750678258, now seen corresponding path program 17 times [2020-07-20 06:19:07,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:19:07,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346590662] [2020-07-20 06:19:07,737 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:19:07,743 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:19:07,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980252949] [2020-07-20 06:19:07,743 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4aac569c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:19:07,871 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4aac569c issued 4 check-sat command(s) [2020-07-20 06:19:07,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:19:07,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 75 conjunts are in the unsatisfiable core [2020-07-20 06:19:07,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:19:08,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 34 proven. 442 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-07-20 06:19:08,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346590662] [2020-07-20 06:19:08,716 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:19:08,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980252949] [2020-07-20 06:19:08,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:19:08,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-07-20 06:19:08,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247618642] [2020-07-20 06:19:08,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 06:19:08,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:19:08,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 06:19:08,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-07-20 06:19:08,718 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 22 states. [2020-07-20 06:19:09,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:19:09,690 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2020-07-20 06:19:09,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 06:19:09,690 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 129 [2020-07-20 06:19:09,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:19:09,693 INFO L225 Difference]: With dead ends: 144 [2020-07-20 06:19:09,693 INFO L226 Difference]: Without dead ends: 141 [2020-07-20 06:19:09,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-07-20 06:19:09,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-07-20 06:19:09,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2020-07-20 06:19:09,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-07-20 06:19:09,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2020-07-20 06:19:09,702 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 129 [2020-07-20 06:19:09,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:19:09,703 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2020-07-20 06:19:09,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 06:19:09,703 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2020-07-20 06:19:09,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-20 06:19:09,704 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:19:09,704 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:19:09,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:19:09,910 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:19:09,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:19:09,911 INFO L82 PathProgramCache]: Analyzing trace with hash 142032401, now seen corresponding path program 18 times [2020-07-20 06:19:09,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:19:09,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008836391] [2020-07-20 06:19:09,912 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:19:09,917 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:19:09,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141178448] [2020-07-20 06:19:09,918 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56f1d5b8 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:19:09,988 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56f1d5b8 issued 4 check-sat command(s) [2020-07-20 06:19:09,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:19:09,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 79 conjunts are in the unsatisfiable core [2020-07-20 06:19:09,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:19:11,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 36 proven. 495 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-07-20 06:19:11,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008836391] [2020-07-20 06:19:11,014 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:19:11,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141178448] [2020-07-20 06:19:11,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:19:11,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-20 06:19:11,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215502948] [2020-07-20 06:19:11,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 06:19:11,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:19:11,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 06:19:11,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-07-20 06:19:11,016 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 23 states. [2020-07-20 06:19:12,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:19:12,141 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2020-07-20 06:19:12,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 06:19:12,142 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 136 [2020-07-20 06:19:12,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:19:12,144 INFO L225 Difference]: With dead ends: 151 [2020-07-20 06:19:12,144 INFO L226 Difference]: Without dead ends: 148 [2020-07-20 06:19:12,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-07-20 06:19:12,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-07-20 06:19:12,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2020-07-20 06:19:12,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-07-20 06:19:12,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2020-07-20 06:19:12,153 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 136 [2020-07-20 06:19:12,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:19:12,154 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2020-07-20 06:19:12,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 06:19:12,154 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2020-07-20 06:19:12,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-07-20 06:19:12,158 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:19:12,159 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:19:12,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:19:12,372 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:19:12,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:19:12,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1283445842, now seen corresponding path program 19 times [2020-07-20 06:19:12,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:19:12,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42002329] [2020-07-20 06:19:12,372 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:19:12,378 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:19:12,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301235320] [2020-07-20 06:19:12,378 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4050f6bf No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:19:12,455 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4050f6bf issued 4 check-sat command(s) [2020-07-20 06:19:12,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:19:12,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 83 conjunts are in the unsatisfiable core [2020-07-20 06:19:12,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:19:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 38 proven. 551 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-07-20 06:19:13,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42002329] [2020-07-20 06:19:13,690 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:19:13,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301235320] [2020-07-20 06:19:13,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:19:13,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-07-20 06:19:13,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603439363] [2020-07-20 06:19:13,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 06:19:13,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:19:13,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 06:19:13,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-07-20 06:19:13,692 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand 24 states. [2020-07-20 06:19:15,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:19:15,404 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2020-07-20 06:19:15,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 06:19:15,405 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 143 [2020-07-20 06:19:15,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:19:15,407 INFO L225 Difference]: With dead ends: 158 [2020-07-20 06:19:15,407 INFO L226 Difference]: Without dead ends: 155 [2020-07-20 06:19:15,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2020-07-20 06:19:15,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-20 06:19:15,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2020-07-20 06:19:15,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-07-20 06:19:15,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2020-07-20 06:19:15,424 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 143 [2020-07-20 06:19:15,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:19:15,425 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2020-07-20 06:19:15,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 06:19:15,425 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2020-07-20 06:19:15,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-07-20 06:19:15,427 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:19:15,427 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:19:15,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-20 06:19:15,635 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:19:15,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:19:15,635 INFO L82 PathProgramCache]: Analyzing trace with hash 991634289, now seen corresponding path program 20 times [2020-07-20 06:19:15,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:19:15,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376306836] [2020-07-20 06:19:15,636 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:19:15,648 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:19:15,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1467006718] [2020-07-20 06:19:15,650 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56ec4400 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:19:15,757 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56ec4400 issued 4 check-sat command(s) [2020-07-20 06:19:15,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:19:15,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 87 conjunts are in the unsatisfiable core [2020-07-20 06:19:15,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:19:17,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 40 proven. 610 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2020-07-20 06:19:17,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376306836] [2020-07-20 06:19:17,428 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:19:17,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467006718] [2020-07-20 06:19:17,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:19:17,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-07-20 06:19:17,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254772985] [2020-07-20 06:19:17,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 06:19:17,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:19:17,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 06:19:17,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-07-20 06:19:17,430 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 25 states. [2020-07-20 06:19:19,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:19:19,468 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2020-07-20 06:19:19,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 06:19:19,472 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 150 [2020-07-20 06:19:19,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:19:19,473 INFO L225 Difference]: With dead ends: 165 [2020-07-20 06:19:19,474 INFO L226 Difference]: Without dead ends: 162 [2020-07-20 06:19:19,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-07-20 06:19:19,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-20 06:19:19,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-07-20 06:19:19,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-07-20 06:19:19,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2020-07-20 06:19:19,483 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 150 [2020-07-20 06:19:19,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:19:19,483 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2020-07-20 06:19:19,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 06:19:19,484 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2020-07-20 06:19:19,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-07-20 06:19:19,485 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:19:19,485 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:19:19,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-07-20 06:19:19,698 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:19:19,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:19:19,699 INFO L82 PathProgramCache]: Analyzing trace with hash 890337870, now seen corresponding path program 21 times [2020-07-20 06:19:19,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:19:19,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282166372] [2020-07-20 06:19:19,699 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:19:19,704 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:19:19,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [646439831] [2020-07-20 06:19:19,705 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24d72714 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:19:19,796 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24d72714 issued 4 check-sat command(s) [2020-07-20 06:19:19,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:19:19,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 91 conjunts are in the unsatisfiable core [2020-07-20 06:19:19,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:19:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 42 proven. 672 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-07-20 06:19:21,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282166372] [2020-07-20 06:19:21,926 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:19:21,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646439831] [2020-07-20 06:19:21,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:19:21,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-07-20 06:19:21,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349996053] [2020-07-20 06:19:21,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 06:19:21,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:19:21,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 06:19:21,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-07-20 06:19:21,928 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 26 states. [2020-07-20 06:19:24,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:19:24,445 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2020-07-20 06:19:24,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 06:19:24,445 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 157 [2020-07-20 06:19:24,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:19:24,447 INFO L225 Difference]: With dead ends: 172 [2020-07-20 06:19:24,447 INFO L226 Difference]: Without dead ends: 169 [2020-07-20 06:19:24,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2020-07-20 06:19:24,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-07-20 06:19:24,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2020-07-20 06:19:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-07-20 06:19:24,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2020-07-20 06:19:24,457 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 157 [2020-07-20 06:19:24,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:19:24,458 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2020-07-20 06:19:24,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 06:19:24,458 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2020-07-20 06:19:24,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-07-20 06:19:24,459 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:19:24,459 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:19:24,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:19:24,674 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:19:24,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:19:24,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1932386095, now seen corresponding path program 22 times [2020-07-20 06:19:24,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:19:24,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834602633] [2020-07-20 06:19:24,676 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:19:24,681 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:19:24,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1655593197] [2020-07-20 06:19:24,681 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4b077cea No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:19:24,757 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4b077cea issued 4 check-sat command(s) [2020-07-20 06:19:24,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:19:24,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 95 conjunts are in the unsatisfiable core [2020-07-20 06:19:24,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:19:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 44 proven. 737 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2020-07-20 06:19:27,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834602633] [2020-07-20 06:19:27,806 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:19:27,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655593197] [2020-07-20 06:19:27,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:19:27,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-07-20 06:19:27,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548785637] [2020-07-20 06:19:27,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 06:19:27,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:19:27,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 06:19:27,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-07-20 06:19:27,811 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 27 states. [2020-07-20 06:19:31,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:19:31,884 INFO L93 Difference]: Finished difference Result 179 states and 181 transitions. [2020-07-20 06:19:31,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-20 06:19:31,884 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 164 [2020-07-20 06:19:31,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:19:31,886 INFO L225 Difference]: With dead ends: 179 [2020-07-20 06:19:31,886 INFO L226 Difference]: Without dead ends: 176 [2020-07-20 06:19:31,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2020-07-20 06:19:31,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-07-20 06:19:31,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2020-07-20 06:19:31,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-07-20 06:19:31,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2020-07-20 06:19:31,897 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 164 [2020-07-20 06:19:31,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:19:31,897 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2020-07-20 06:19:31,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 06:19:31,898 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2020-07-20 06:19:31,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-07-20 06:19:31,899 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:19:31,899 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:19:32,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-07-20 06:19:32,114 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:19:32,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:19:32,115 INFO L82 PathProgramCache]: Analyzing trace with hash 677687534, now seen corresponding path program 23 times [2020-07-20 06:19:32,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:19:32,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777178197] [2020-07-20 06:19:32,115 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:19:32,120 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:19:32,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803215422] [2020-07-20 06:19:32,120 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@46976ad0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:19:32,209 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@46976ad0 issued 4 check-sat command(s) [2020-07-20 06:19:32,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:19:32,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 99 conjunts are in the unsatisfiable core [2020-07-20 06:19:32,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:19:36,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 46 proven. 805 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-07-20 06:19:36,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777178197] [2020-07-20 06:19:36,988 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:19:36,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803215422] [2020-07-20 06:19:36,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:19:36,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-07-20 06:19:36,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780598438] [2020-07-20 06:19:36,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 06:19:36,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:19:36,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 06:19:36,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-07-20 06:19:36,990 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand 28 states. [2020-07-20 06:19:43,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:19:43,109 INFO L93 Difference]: Finished difference Result 186 states and 188 transitions. [2020-07-20 06:19:43,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 06:19:43,112 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 171 [2020-07-20 06:19:43,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:19:43,113 INFO L225 Difference]: With dead ends: 186 [2020-07-20 06:19:43,113 INFO L226 Difference]: Without dead ends: 183 [2020-07-20 06:19:43,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2020-07-20 06:19:43,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-07-20 06:19:43,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2020-07-20 06:19:43,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-07-20 06:19:43,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2020-07-20 06:19:43,124 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 171 [2020-07-20 06:19:43,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:19:43,124 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2020-07-20 06:19:43,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 06:19:43,125 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2020-07-20 06:19:43,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-07-20 06:19:43,126 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:19:43,126 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:19:43,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:19:43,340 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:19:43,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:19:43,340 INFO L82 PathProgramCache]: Analyzing trace with hash 844248625, now seen corresponding path program 24 times [2020-07-20 06:19:43,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:19:43,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812781467] [2020-07-20 06:19:43,341 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:19:43,346 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:19:43,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829171671] [2020-07-20 06:19:43,346 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16c26de No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:19:43,580 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16c26de issued 4 check-sat command(s) [2020-07-20 06:19:43,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:19:43,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 103 conjunts are in the unsatisfiable core [2020-07-20 06:19:43,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:19:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 48 proven. 876 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2020-07-20 06:19:50,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812781467] [2020-07-20 06:19:50,858 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:19:50,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829171671] [2020-07-20 06:19:50,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:19:50,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-07-20 06:19:50,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792097933] [2020-07-20 06:19:50,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 06:19:50,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:19:50,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 06:19:50,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-07-20 06:19:50,860 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand 29 states. [2020-07-20 06:19:58,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:19:58,007 INFO L93 Difference]: Finished difference Result 193 states and 195 transitions. [2020-07-20 06:19:58,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 06:19:58,007 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 178 [2020-07-20 06:19:58,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:19:58,009 INFO L225 Difference]: With dead ends: 193 [2020-07-20 06:19:58,010 INFO L226 Difference]: Without dead ends: 190 [2020-07-20 06:19:58,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2020-07-20 06:19:58,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-07-20 06:19:58,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2020-07-20 06:19:58,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-07-20 06:19:58,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2020-07-20 06:19:58,022 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 178 [2020-07-20 06:19:58,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:19:58,023 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2020-07-20 06:19:58,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 06:19:58,023 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2020-07-20 06:19:58,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-07-20 06:19:58,024 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:19:58,024 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:19:58,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-07-20 06:19:58,238 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:19:58,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:19:58,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1073492082, now seen corresponding path program 25 times [2020-07-20 06:19:58,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:19:58,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134020678] [2020-07-20 06:19:58,240 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:19:58,245 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:19:58,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961886793] [2020-07-20 06:19:58,245 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@773dad61 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:19:58,335 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@773dad61 issued 4 check-sat command(s) [2020-07-20 06:19:58,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:19:58,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 107 conjunts are in the unsatisfiable core [2020-07-20 06:19:58,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:20:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 50 proven. 950 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-07-20 06:20:07,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134020678] [2020-07-20 06:20:07,442 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:20:07,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961886793] [2020-07-20 06:20:07,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:20:07,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-07-20 06:20:07,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171558073] [2020-07-20 06:20:07,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-20 06:20:07,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:20:07,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-20 06:20:07,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-07-20 06:20:07,444 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand 30 states. [2020-07-20 06:20:16,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:20:16,946 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2020-07-20 06:20:16,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 06:20:16,947 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 185 [2020-07-20 06:20:16,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:20:16,949 INFO L225 Difference]: With dead ends: 200 [2020-07-20 06:20:16,949 INFO L226 Difference]: Without dead ends: 197 [2020-07-20 06:20:16,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2020-07-20 06:20:16,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-07-20 06:20:16,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2020-07-20 06:20:16,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-07-20 06:20:16,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2020-07-20 06:20:16,959 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 185 [2020-07-20 06:20:16,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:20:16,960 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2020-07-20 06:20:16,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-20 06:20:16,960 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2020-07-20 06:20:16,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-07-20 06:20:16,961 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:20:16,961 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:20:17,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-07-20 06:20:17,166 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:20:17,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:20:17,167 INFO L82 PathProgramCache]: Analyzing trace with hash -372153455, now seen corresponding path program 26 times [2020-07-20 06:20:17,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:20:17,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801786304] [2020-07-20 06:20:17,167 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:20:17,173 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:20:17,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [674177697] [2020-07-20 06:20:17,173 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@457c42d2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:20:17,266 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@457c42d2 issued 4 check-sat command(s) [2020-07-20 06:20:17,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:20:17,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 111 conjunts are in the unsatisfiable core [2020-07-20 06:20:17,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:20:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 52 proven. 1027 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2020-07-20 06:20:30,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801786304] [2020-07-20 06:20:30,022 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:20:30,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674177697] [2020-07-20 06:20:30,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:20:30,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-07-20 06:20:30,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013532035] [2020-07-20 06:20:30,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-20 06:20:30,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:20:30,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-20 06:20:30,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-07-20 06:20:30,024 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 31 states. [2020-07-20 06:20:41,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:20:41,722 INFO L93 Difference]: Finished difference Result 207 states and 209 transitions. [2020-07-20 06:20:41,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-20 06:20:41,723 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 192 [2020-07-20 06:20:41,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:20:41,725 INFO L225 Difference]: With dead ends: 207 [2020-07-20 06:20:41,725 INFO L226 Difference]: Without dead ends: 204 [2020-07-20 06:20:41,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2020-07-20 06:20:41,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-07-20 06:20:41,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2020-07-20 06:20:41,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-20 06:20:41,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2020-07-20 06:20:41,736 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 192 [2020-07-20 06:20:41,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:20:41,736 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2020-07-20 06:20:41,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-20 06:20:41,736 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2020-07-20 06:20:41,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-20 06:20:41,737 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:20:41,738 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:20:41,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-07-20 06:20:41,952 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:20:41,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:20:41,952 INFO L82 PathProgramCache]: Analyzing trace with hash -185018834, now seen corresponding path program 27 times [2020-07-20 06:20:41,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:20:41,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217353209] [2020-07-20 06:20:41,953 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:20:41,960 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:20:41,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [944814471] [2020-07-20 06:20:41,960 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@30532c8 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:20:42,112 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@30532c8 issued 4 check-sat command(s) [2020-07-20 06:20:42,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:20:42,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 115 conjunts are in the unsatisfiable core [2020-07-20 06:20:42,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:20:56,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 54 proven. 1107 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-07-20 06:20:56,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217353209] [2020-07-20 06:20:56,719 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:20:56,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944814471] [2020-07-20 06:20:56,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:20:56,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-07-20 06:20:56,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058841822] [2020-07-20 06:20:56,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-20 06:20:56,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:20:56,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-20 06:20:56,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-07-20 06:20:56,720 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 32 states. [2020-07-20 06:21:10,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:21:10,959 INFO L93 Difference]: Finished difference Result 214 states and 216 transitions. [2020-07-20 06:21:10,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 06:21:10,960 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 199 [2020-07-20 06:21:10,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:21:10,962 INFO L225 Difference]: With dead ends: 214 [2020-07-20 06:21:10,962 INFO L226 Difference]: Without dead ends: 211 [2020-07-20 06:21:10,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 06:21:10,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-07-20 06:21:10,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2020-07-20 06:21:10,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-07-20 06:21:10,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2020-07-20 06:21:10,975 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 199 [2020-07-20 06:21:10,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:21:10,976 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2020-07-20 06:21:10,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-20 06:21:10,976 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2020-07-20 06:21:10,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-07-20 06:21:10,978 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:21:10,979 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:21:11,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-07-20 06:21:11,194 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:21:11,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:21:11,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1527097585, now seen corresponding path program 28 times [2020-07-20 06:21:11,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:21:11,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84463451] [2020-07-20 06:21:11,196 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:21:11,204 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:21:11,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572345560] [2020-07-20 06:21:11,205 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b6a4a33 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:21:11,332 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b6a4a33 issued 4 check-sat command(s) [2020-07-20 06:21:11,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:21:11,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 119 conjunts are in the unsatisfiable core [2020-07-20 06:21:11,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:21:28,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2758 backedges. 56 proven. 1190 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2020-07-20 06:21:28,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84463451] [2020-07-20 06:21:28,583 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:21:28,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572345560] [2020-07-20 06:21:28,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:21:28,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-07-20 06:21:28,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771446908] [2020-07-20 06:21:28,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-20 06:21:28,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:21:28,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-20 06:21:28,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 06:21:28,585 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand 33 states. [2020-07-20 06:21:45,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:21:45,178 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2020-07-20 06:21:45,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-20 06:21:45,179 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 206 [2020-07-20 06:21:45,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:21:45,181 INFO L225 Difference]: With dead ends: 221 [2020-07-20 06:21:45,181 INFO L226 Difference]: Without dead ends: 218 [2020-07-20 06:21:45,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 06:21:45,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-07-20 06:21:45,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2020-07-20 06:21:45,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-07-20 06:21:45,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 219 transitions. [2020-07-20 06:21:45,192 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 219 transitions. Word has length 206 [2020-07-20 06:21:45,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:21:45,192 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 219 transitions. [2020-07-20 06:21:45,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-20 06:21:45,192 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 219 transitions. [2020-07-20 06:21:45,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-07-20 06:21:45,194 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:21:45,194 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:21:45,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:21:45,407 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:21:45,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:21:45,408 INFO L82 PathProgramCache]: Analyzing trace with hash 651019470, now seen corresponding path program 29 times [2020-07-20 06:21:45,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:21:45,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405029071] [2020-07-20 06:21:45,409 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:21:45,413 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:21:45,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1336188749] [2020-07-20 06:21:45,413 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@184c901a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:21:45,735 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@184c901a issued 4 check-sat command(s) [2020-07-20 06:21:45,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:21:45,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 123 conjunts are in the unsatisfiable core [2020-07-20 06:21:45,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:22:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 58 proven. 1276 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2020-07-20 06:22:06,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405029071] [2020-07-20 06:22:06,596 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:22:06,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336188749] [2020-07-20 06:22:06,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:22:06,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-07-20 06:22:06,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334995912] [2020-07-20 06:22:06,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-20 06:22:06,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:22:06,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-20 06:22:06,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 06:22:06,599 INFO L87 Difference]: Start difference. First operand 218 states and 219 transitions. Second operand 34 states. [2020-07-20 06:22:26,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:22:26,006 INFO L93 Difference]: Finished difference Result 228 states and 230 transitions. [2020-07-20 06:22:26,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-20 06:22:26,007 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 213 [2020-07-20 06:22:26,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:22:26,009 INFO L225 Difference]: With dead ends: 228 [2020-07-20 06:22:26,010 INFO L226 Difference]: Without dead ends: 225 [2020-07-20 06:22:26,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 06:22:26,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-07-20 06:22:26,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2020-07-20 06:22:26,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-07-20 06:22:26,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2020-07-20 06:22:26,021 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 213 [2020-07-20 06:22:26,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:22:26,022 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2020-07-20 06:22:26,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-20 06:22:26,022 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2020-07-20 06:22:26,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-07-20 06:22:26,024 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:22:26,024 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:22:26,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:22:26,239 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:22:26,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:22:26,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1998915153, now seen corresponding path program 30 times [2020-07-20 06:22:26,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:22:26,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230761751] [2020-07-20 06:22:26,240 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:22:26,247 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:22:26,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580050673] [2020-07-20 06:22:26,248 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5381d247 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:22:26,541 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5381d247 issued 4 check-sat command(s) [2020-07-20 06:22:26,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:22:26,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 127 conjunts are in the unsatisfiable core [2020-07-20 06:22:26,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:22:27,208 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:22:28,217 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 06:22:28,627 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:22:29,075 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:22:29,559 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:22:30,682 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:22:31,290 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:22:34,163 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:22:34,981 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:22:35,820 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:22:37,707 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:22:42,985 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:22:44,184 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:22:45,638 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 06:22:46,937 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:22:48,262 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:22:50,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3165 backedges. 60 proven. 1365 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2020-07-20 06:22:50,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230761751] [2020-07-20 06:22:50,683 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:22:50,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580050673] [2020-07-20 06:22:50,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:22:50,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-07-20 06:22:50,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085731134] [2020-07-20 06:22:50,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-20 06:22:50,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:22:50,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-20 06:22:50,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 06:22:50,685 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand 35 states. [2020-07-20 06:23:12,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:23:12,110 INFO L93 Difference]: Finished difference Result 235 states and 237 transitions. [2020-07-20 06:23:12,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-20 06:23:12,111 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 220 [2020-07-20 06:23:12,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:23:12,113 INFO L225 Difference]: With dead ends: 235 [2020-07-20 06:23:12,113 INFO L226 Difference]: Without dead ends: 232 [2020-07-20 06:23:12,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 06:23:12,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-07-20 06:23:12,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2020-07-20 06:23:12,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-20 06:23:12,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2020-07-20 06:23:12,124 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 220 [2020-07-20 06:23:12,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:23:12,124 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2020-07-20 06:23:12,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-20 06:23:12,124 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2020-07-20 06:23:12,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-07-20 06:23:12,125 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:23:12,126 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:23:12,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:23:12,327 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:23:12,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:23:12,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1148413074, now seen corresponding path program 31 times [2020-07-20 06:23:12,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:23:12,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304928862] [2020-07-20 06:23:12,328 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:23:12,333 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:23:12,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997787083] [2020-07-20 06:23:12,333 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4c626540 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:23:12,442 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4c626540 issued 4 check-sat command(s) [2020-07-20 06:23:12,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:23:12,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 131 conjunts are in the unsatisfiable core [2020-07-20 06:23:12,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:23:12,869 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-07-20 06:23:13,142 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:23:13,465 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 06:23:13,826 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 06:23:14,655 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:23:15,140 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:23:15,680 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:23:16,253 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:23:16,860 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:23:17,511 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 06:23:18,206 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:23:18,954 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:23:19,734 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:23:20,561 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:23:21,410 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:23:22,338 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:23:23,287 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:23:24,291 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:23:25,360 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:23:26,421 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:23:27,563 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:23:28,722 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:23:29,874 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:23:31,117 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:23:33,655 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:23:35,020 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:23:36,460 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:23:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3379 backedges. 62 proven. 1457 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-20 06:23:39,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304928862] [2020-07-20 06:23:39,080 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:23:39,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997787083] [2020-07-20 06:23:39,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:23:39,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-07-20 06:23:39,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283552888] [2020-07-20 06:23:39,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 06:23:39,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:23:39,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 06:23:39,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 06:23:39,081 INFO L87 Difference]: Start difference. First operand 232 states and 233 transitions. Second operand 36 states. [2020-07-20 06:24:02,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:24:02,812 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2020-07-20 06:24:02,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 06:24:02,813 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 227 [2020-07-20 06:24:02,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:24:02,815 INFO L225 Difference]: With dead ends: 242 [2020-07-20 06:24:02,815 INFO L226 Difference]: Without dead ends: 239 [2020-07-20 06:24:02,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 06:24:02,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-07-20 06:24:02,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2020-07-20 06:24:02,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-07-20 06:24:02,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 240 transitions. [2020-07-20 06:24:02,827 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 240 transitions. Word has length 227 [2020-07-20 06:24:02,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:24:02,827 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 240 transitions. [2020-07-20 06:24:02,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 06:24:02,827 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 240 transitions. [2020-07-20 06:24:02,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-07-20 06:24:02,829 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:24:02,829 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:24:03,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-07-20 06:24:03,044 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:24:03,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:24:03,044 INFO L82 PathProgramCache]: Analyzing trace with hash -656049231, now seen corresponding path program 32 times [2020-07-20 06:24:03,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:24:03,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529921983] [2020-07-20 06:24:03,044 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:24:03,049 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:24:03,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742645424] [2020-07-20 06:24:03,049 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5ceaafda No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:24:03,165 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5ceaafda issued 4 check-sat command(s) [2020-07-20 06:24:03,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:24:03,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 135 conjunts are in the unsatisfiable core [2020-07-20 06:24:03,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:24:03,608 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-07-20 06:24:03,903 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 06:24:04,610 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:24:05,504 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:24:06,029 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:24:06,611 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:24:07,215 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:24:07,872 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:24:08,603 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:24:09,401 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:24:10,263 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:24:11,134 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:24:12,170 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 06:24:13,159 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:24:14,194 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:24:15,256 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:24:16,303 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:24:17,430 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:24:18,610 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:24:19,805 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:24:21,033 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:24:22,363 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:24:23,717 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:24:25,294 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 06:24:26,786 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:24:28,327 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:24:29,825 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:24:31,434 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:24:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 64 proven. 1552 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2020-07-20 06:24:34,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529921983] [2020-07-20 06:24:34,216 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:24:34,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742645424] [2020-07-20 06:24:34,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:24:34,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-07-20 06:24:34,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100049120] [2020-07-20 06:24:34,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-20 06:24:34,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:24:34,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-20 06:24:34,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 06:24:34,217 INFO L87 Difference]: Start difference. First operand 239 states and 240 transitions. Second operand 37 states. [2020-07-20 06:25:03,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:25:03,076 INFO L93 Difference]: Finished difference Result 249 states and 251 transitions. [2020-07-20 06:25:03,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-20 06:25:03,077 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 234 [2020-07-20 06:25:03,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:25:03,078 INFO L225 Difference]: With dead ends: 249 [2020-07-20 06:25:03,078 INFO L226 Difference]: Without dead ends: 246 [2020-07-20 06:25:03,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.7s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 06:25:03,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-07-20 06:25:03,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2020-07-20 06:25:03,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-07-20 06:25:03,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 247 transitions. [2020-07-20 06:25:03,089 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 247 transitions. Word has length 234 [2020-07-20 06:25:03,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:25:03,089 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 247 transitions. [2020-07-20 06:25:03,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-20 06:25:03,090 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 247 transitions. [2020-07-20 06:25:03,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 06:25:03,091 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:25:03,091 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:25:03,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:25:03,305 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:25:03,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:25:03,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1077978610, now seen corresponding path program 33 times [2020-07-20 06:25:03,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:25:03,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456693612] [2020-07-20 06:25:03,306 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:25:03,312 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:25:03,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1411601582] [2020-07-20 06:25:03,313 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@22810af9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:25:03,446 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@22810af9 issued 4 check-sat command(s) [2020-07-20 06:25:03,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:25:03,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 139 conjunts are in the unsatisfiable core [2020-07-20 06:25:03,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:25:03,695 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:25:04,246 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:25:04,960 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:25:05,436 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:25:05,931 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:25:06,502 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:25:07,128 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:25:07,783 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:25:08,456 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:25:09,178 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:25:09,977 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:25:10,803 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:25:11,691 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:25:12,690 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 06:25:13,799 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 06:25:14,886 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:25:16,020 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:25:17,193 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:25:18,344 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:25:19,536 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:25:20,831 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:25:22,136 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:25:23,486 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:25:24,916 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:25:26,382 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:25:28,020 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:25:29,646 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:25:31,256 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:25:32,983 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:25:34,690 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:25:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 66 proven. 1650 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2020-07-20 06:25:37,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456693612] [2020-07-20 06:25:37,916 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:25:37,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411601582] [2020-07-20 06:25:37,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:25:37,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-07-20 06:25:37,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643678838] [2020-07-20 06:25:37,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-20 06:25:37,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:25:37,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-20 06:25:37,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 06:25:37,918 INFO L87 Difference]: Start difference. First operand 246 states and 247 transitions. Second operand 38 states. [2020-07-20 06:26:10,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:26:10,598 INFO L93 Difference]: Finished difference Result 256 states and 258 transitions. [2020-07-20 06:26:10,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-20 06:26:10,599 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 241 [2020-07-20 06:26:10,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:26:10,601 INFO L225 Difference]: With dead ends: 256 [2020-07-20 06:26:10,601 INFO L226 Difference]: Without dead ends: 253 [2020-07-20 06:26:10,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 06:26:10,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-07-20 06:26:10,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2020-07-20 06:26:10,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-07-20 06:26:10,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 254 transitions. [2020-07-20 06:26:10,613 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 254 transitions. Word has length 241 [2020-07-20 06:26:10,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:26:10,613 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 254 transitions. [2020-07-20 06:26:10,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-20 06:26:10,614 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 254 transitions. [2020-07-20 06:26:10,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-07-20 06:26:10,615 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:26:10,615 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:26:10,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-07-20 06:26:10,831 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:26:10,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:26:10,831 INFO L82 PathProgramCache]: Analyzing trace with hash 612174097, now seen corresponding path program 34 times [2020-07-20 06:26:10,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:26:10,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758415633] [2020-07-20 06:26:10,831 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:26:10,835 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:26:10,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [283469913] [2020-07-20 06:26:10,836 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2da6526d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:26:11,342 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2da6526d issued 4 check-sat command(s) [2020-07-20 06:26:11,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:26:11,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 143 conjunts are in the unsatisfiable core [2020-07-20 06:26:11,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:26:11,795 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-07-20 06:26:12,120 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 06:26:12,492 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:26:12,909 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:26:13,375 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:26:13,916 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:26:14,505 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:26:15,128 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:26:15,806 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:26:16,538 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 06:26:17,352 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:26:18,189 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:26:19,059 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:26:20,016 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 06:26:21,066 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:26:22,187 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:26:23,344 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:26:24,542 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:26:25,739 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:26:27,079 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:26:28,431 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:26:29,762 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:26:31,298 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 06:26:32,820 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:26:34,404 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:26:35,956 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:26:37,561 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:26:39,208 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:26:41,140 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 06:26:43,465 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 06:26:45,458 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:26:47,364 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:26:50,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4063 backedges. 68 proven. 1751 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2020-07-20 06:26:50,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758415633] [2020-07-20 06:26:50,796 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:26:50,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283469913] [2020-07-20 06:26:50,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:26:50,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-07-20 06:26:50,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784191719] [2020-07-20 06:26:50,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-20 06:26:50,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:26:50,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-20 06:26:50,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 06:26:50,797 INFO L87 Difference]: Start difference. First operand 253 states and 254 transitions. Second operand 39 states. [2020-07-20 06:27:28,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:27:28,737 INFO L93 Difference]: Finished difference Result 263 states and 265 transitions. [2020-07-20 06:27:28,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-20 06:27:28,738 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 248 [2020-07-20 06:27:28,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:27:28,740 INFO L225 Difference]: With dead ends: 263 [2020-07-20 06:27:28,740 INFO L226 Difference]: Without dead ends: 260 [2020-07-20 06:27:28,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.2s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 06:27:28,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-07-20 06:27:28,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2020-07-20 06:27:28,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-07-20 06:27:28,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 261 transitions. [2020-07-20 06:27:28,751 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 261 transitions. Word has length 248 [2020-07-20 06:27:28,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:27:28,752 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 261 transitions. [2020-07-20 06:27:28,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-20 06:27:28,752 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 261 transitions. [2020-07-20 06:27:28,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 06:27:28,754 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:27:28,754 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:27:28,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:27:28,958 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:27:28,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:27:28,959 INFO L82 PathProgramCache]: Analyzing trace with hash -2039480146, now seen corresponding path program 35 times [2020-07-20 06:27:28,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:27:28,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724869146] [2020-07-20 06:27:28,960 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:27:28,965 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:27:28,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071802547] [2020-07-20 06:27:28,965 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@32bba752 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:27:29,071 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@32bba752 issued 4 check-sat command(s) [2020-07-20 06:27:29,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:27:29,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 147 conjunts are in the unsatisfiable core [2020-07-20 06:27:29,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:27:29,301 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 06:27:29,910 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 06:27:30,329 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 06:27:30,803 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 06:27:31,329 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:27:31,905 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:27:32,535 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:27:33,240 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:27:33,980 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 06:27:34,791 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:27:35,656 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:27:36,578 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:27:37,556 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:27:38,672 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:27:39,845 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:27:41,016 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:27:42,420 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 06:27:43,673 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:27:45,188 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 06:27:46,938 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 06:27:48,931 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 06:27:50,481 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:27:52,063 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:27:53,717 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:27:55,389 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:27:57,129 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:27:59,058 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:28:00,997 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:28:02,954 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:28:04,935 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:28:06,943 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:28:09,070 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:28:11,369 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:28:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 70 proven. 1855 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2020-07-20 06:28:15,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724869146] [2020-07-20 06:28:15,295 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:28:15,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071802547] [2020-07-20 06:28:15,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:28:15,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-07-20 06:28:15,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146850296] [2020-07-20 06:28:15,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-20 06:28:15,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:28:15,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-20 06:28:15,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 06:28:15,298 INFO L87 Difference]: Start difference. First operand 260 states and 261 transitions. Second operand 40 states. [2020-07-20 06:29:00,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:29:00,494 INFO L93 Difference]: Finished difference Result 270 states and 272 transitions. [2020-07-20 06:29:00,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-20 06:29:00,495 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 255 [2020-07-20 06:29:00,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:29:00,497 INFO L225 Difference]: With dead ends: 270 [2020-07-20 06:29:00,497 INFO L226 Difference]: Without dead ends: 267 [2020-07-20 06:29:00,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.1s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 06:29:00,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-07-20 06:29:00,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2020-07-20 06:29:00,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-07-20 06:29:00,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 268 transitions. [2020-07-20 06:29:00,516 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 268 transitions. Word has length 255 [2020-07-20 06:29:00,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:29:00,517 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 268 transitions. [2020-07-20 06:29:00,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-20 06:29:00,517 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 268 transitions. [2020-07-20 06:29:00,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-07-20 06:29:00,518 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:29:00,518 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:29:00,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-07-20 06:29:00,719 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:29:00,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:29:00,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1738649201, now seen corresponding path program 36 times [2020-07-20 06:29:00,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:29:00,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798961270] [2020-07-20 06:29:00,721 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:29:00,726 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:29:00,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [144475286] [2020-07-20 06:29:00,726 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3777fc5b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:29:00,844 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3777fc5b issued 4 check-sat command(s) [2020-07-20 06:29:00,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:29:00,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 151 conjunts are in the unsatisfiable core [2020-07-20 06:29:00,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:29:01,121 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 06:29:01,484 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-07-20 06:29:01,910 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:29:02,397 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 06:29:03,001 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:29:03,624 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:29:04,264 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:29:05,001 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:29:05,825 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:29:06,684 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:29:07,607 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:29:08,662 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:29:09,721 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 06:29:10,862 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 06:29:12,080 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 06:29:13,328 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 06:29:14,855 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:29:16,232 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:29:17,695 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:29:19,270 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:29:20,977 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:29:22,667 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:29:24,578 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 06:29:26,532 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 06:29:28,491 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 06:29:30,648 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 06:29:32,751 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:29:34,807 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:29:36,838 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:29:38,959 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:29:41,294 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 06:29:43,593 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:29:46,008 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:29:48,487 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:29:51,026 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:29:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4554 backedges. 72 proven. 1962 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2020-07-20 06:29:55,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798961270] [2020-07-20 06:29:55,841 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:29:55,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144475286] [2020-07-20 06:29:55,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:29:55,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-07-20 06:29:55,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138474100] [2020-07-20 06:29:55,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-20 06:29:55,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:29:55,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-20 06:29:55,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 06:29:55,843 INFO L87 Difference]: Start difference. First operand 267 states and 268 transitions. Second operand 41 states. [2020-07-20 06:30:49,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:30:49,027 INFO L93 Difference]: Finished difference Result 277 states and 279 transitions. [2020-07-20 06:30:49,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-07-20 06:30:49,028 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 262 [2020-07-20 06:30:49,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:30:49,030 INFO L225 Difference]: With dead ends: 277 [2020-07-20 06:30:49,030 INFO L226 Difference]: Without dead ends: 274 [2020-07-20 06:30:49,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.1s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 06:30:49,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-07-20 06:30:49,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2020-07-20 06:30:49,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-07-20 06:30:49,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 275 transitions. [2020-07-20 06:30:49,042 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 275 transitions. Word has length 262 [2020-07-20 06:30:49,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:30:49,042 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 275 transitions. [2020-07-20 06:30:49,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-20 06:30:49,043 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 275 transitions. [2020-07-20 06:30:49,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-07-20 06:30:49,044 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:30:49,044 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:30:49,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-07-20 06:30:49,246 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:30:49,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:30:49,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1227394894, now seen corresponding path program 37 times [2020-07-20 06:30:49,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:30:49,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766478006] [2020-07-20 06:30:49,247 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364cfc5d [2020-07-20 06:30:49,252 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:30:49,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340942864] [2020-07-20 06:30:49,252 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16477b59 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:30:49,381 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16477b59 issued 4 check-sat command(s) [2020-07-20 06:30:49,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:30:49,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 155 conjunts are in the unsatisfiable core [2020-07-20 06:30:49,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:30:49,677 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 06:30:49,995 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:30:50,444 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:30:50,953 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 06:30:51,534 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 06:30:52,236 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:30:52,962 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:30:53,766 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:30:54,689 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:30:55,627 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:30:56,629 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:30:57,710 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:30:58,854 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:30:59,994 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:31:01,467 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 06:31:03,085 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 06:31:04,603 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:31:06,178 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:31:07,779 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:31:09,516 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:31:11,310 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:31:13,163 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:31:14,963 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:31:16,966 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:31:18,985 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:31:21,122 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:31:23,281 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:31:25,447 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:31:27,747 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 06:31:30,412 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 06:31:32,933 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:31:35,549 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:31:38,237 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:31:40,999 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:31:43,697 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:31:46,562 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 06:31:51,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4810 backedges. 74 proven. 2072 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2020-07-20 06:31:51,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766478006] [2020-07-20 06:31:51,673 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:31:51,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340942864] [2020-07-20 06:31:51,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:31:51,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-07-20 06:31:51,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307336203] [2020-07-20 06:31:51,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-20 06:31:51,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:31:51,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-20 06:31:51,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 06:31:51,676 INFO L87 Difference]: Start difference. First operand 274 states and 275 transitions. Second operand 42 states.