/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/mannadiv.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 02:00:18,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 02:00:18,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 02:00:18,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 02:00:18,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 02:00:18,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 02:00:18,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 02:00:18,366 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 02:00:18,373 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 02:00:18,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 02:00:18,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 02:00:18,378 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 02:00:18,379 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 02:00:18,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 02:00:18,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 02:00:18,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 02:00:18,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 02:00:18,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 02:00:18,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 02:00:18,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 02:00:18,401 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 02:00:18,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 02:00:18,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 02:00:18,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 02:00:18,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 02:00:18,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 02:00:18,428 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 02:00:18,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 02:00:18,431 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 02:00:18,455 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 02:00:18,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 02:00:18,457 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 02:00:18,457 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 02:00:18,458 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 02:00:18,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 02:00:18,458 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 02:00:18,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 02:00:18,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 02:00:18,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 02:00:18,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 02:00:18,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 02:00:18,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 02:00:18,459 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 02:00:18,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 02:00:18,460 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 02:00:18,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 02:00:18,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 02:00:18,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 02:00:18,461 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 02:00:18,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 02:00:18,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 02:00:18,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 02:00:18,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 02:00:18,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 02:00:18,462 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 02:00:18,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 02:00:18,462 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 02:00:18,463 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 02:00:18,463 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 02:00:18,772 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 02:00:18,787 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 02:00:18,791 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 02:00:18,793 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 02:00:18,793 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 02:00:18,794 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/mannadiv.c [2020-07-20 02:00:18,874 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9a027111/c4470153d4864e41bd83404e9c61dcf0/FLAG951efa376 [2020-07-20 02:00:19,410 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 02:00:19,411 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/mannadiv.c [2020-07-20 02:00:19,419 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9a027111/c4470153d4864e41bd83404e9c61dcf0/FLAG951efa376 [2020-07-20 02:00:19,808 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9a027111/c4470153d4864e41bd83404e9c61dcf0 [2020-07-20 02:00:19,820 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 02:00:19,824 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 02:00:19,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 02:00:19,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 02:00:19,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 02:00:19,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:00:19" (1/1) ... [2020-07-20 02:00:19,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e6df241 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:00:19, skipping insertion in model container [2020-07-20 02:00:19,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:00:19" (1/1) ... [2020-07-20 02:00:19,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 02:00:19,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 02:00:20,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 02:00:20,060 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 02:00:20,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 02:00:20,100 INFO L208 MainTranslator]: Completed translation [2020-07-20 02:00:20,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:00:20 WrapperNode [2020-07-20 02:00:20,101 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 02:00:20,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 02:00:20,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 02:00:20,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 02:00:20,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:00:20" (1/1) ... [2020-07-20 02:00:20,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:00:20" (1/1) ... [2020-07-20 02:00:20,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:00:20" (1/1) ... [2020-07-20 02:00:20,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:00:20" (1/1) ... [2020-07-20 02:00:20,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:00:20" (1/1) ... [2020-07-20 02:00:20,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:00:20" (1/1) ... [2020-07-20 02:00:20,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:00:20" (1/1) ... [2020-07-20 02:00:20,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 02:00:20,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 02:00:20,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 02:00:20,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 02:00:20,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:00:20" (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 02:00:20,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 02:00:20,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 02:00:20,321 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 02:00:20,321 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 02:00:20,321 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 02:00:20,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 02:00:20,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 02:00:20,322 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 02:00:20,322 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 02:00:20,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 02:00:20,322 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 02:00:20,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 02:00:20,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 02:00:20,524 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 02:00:20,525 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 02:00:20,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:00:20 BoogieIcfgContainer [2020-07-20 02:00:20,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 02:00:20,531 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 02:00:20,531 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 02:00:20,535 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 02:00:20,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:00:19" (1/3) ... [2020-07-20 02:00:20,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@535b8600 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:00:20, skipping insertion in model container [2020-07-20 02:00:20,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:00:20" (2/3) ... [2020-07-20 02:00:20,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@535b8600 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:00:20, skipping insertion in model container [2020-07-20 02:00:20,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:00:20" (3/3) ... [2020-07-20 02:00:20,539 INFO L109 eAbstractionObserver]: Analyzing ICFG mannadiv.c [2020-07-20 02:00:20,550 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 02:00:20,558 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 02:00:20,577 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 02:00:20,608 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 02:00:20,608 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 02:00:20,608 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 02:00:20,609 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 02:00:20,609 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 02:00:20,610 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 02:00:20,610 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 02:00:20,610 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 02:00:20,634 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-07-20 02:00:20,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 02:00:20,643 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:20,644 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:20,645 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:20,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:20,654 INFO L82 PathProgramCache]: Analyzing trace with hash -849943384, now seen corresponding path program 1 times [2020-07-20 02:00:20,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:20,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96886473] [2020-07-20 02:00:20,670 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:00:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:00:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:00:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:00:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 02:00:20,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96886473] [2020-07-20 02:00:20,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:00:20,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 02:00:20,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690430909] [2020-07-20 02:00:20,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 02:00:20,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:20,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 02:00:20,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 02:00:20,882 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-07-20 02:00:20,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:20,908 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2020-07-20 02:00:20,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 02:00:20,910 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-20 02:00:20,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:20,922 INFO L225 Difference]: With dead ends: 50 [2020-07-20 02:00:20,922 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 02:00:20,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 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 02:00:20,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 02:00:20,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-20 02:00:20,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 02:00:20,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-07-20 02:00:20,980 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 21 [2020-07-20 02:00:20,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:20,980 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-07-20 02:00:20,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 02:00:20,981 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-07-20 02:00:20,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 02:00:20,983 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:20,983 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:20,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 02:00:20,984 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:20,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:20,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1193991140, now seen corresponding path program 1 times [2020-07-20 02:00:20,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:20,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614122216] [2020-07-20 02:00:20,986 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:21,007 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:21,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2142151746] [2020-07-20 02:00:21,008 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@634b1c7 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:21,074 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@634b1c7 issued 4 check-sat command(s) [2020-07-20 02:00:21,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:21,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 02:00:21,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 02:00:21,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614122216] [2020-07-20 02:00:21,229 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:21,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142151746] [2020-07-20 02:00:21,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:00:21,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 02:00:21,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756806468] [2020-07-20 02:00:21,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 02:00:21,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:21,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 02:00:21,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-20 02:00:21,240 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 8 states. [2020-07-20 02:00:21,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:21,437 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-07-20 02:00:21,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 02:00:21,438 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-07-20 02:00:21,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:21,440 INFO L225 Difference]: With dead ends: 34 [2020-07-20 02:00:21,441 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 02:00:21,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 02:00:21,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 02:00:21,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-07-20 02:00:21,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 02:00:21,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-20 02:00:21,456 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 21 [2020-07-20 02:00:21,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:21,458 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-20 02:00:21,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 02:00:21,458 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-20 02:00:21,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 02:00:21,462 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:21,462 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:21,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 02:00:21,670 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:21,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:21,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1415100442, now seen corresponding path program 1 times [2020-07-20 02:00:21,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:21,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69135312] [2020-07-20 02:00:21,672 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:21,686 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:21,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531868972] [2020-07-20 02:00:21,687 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@d024de0 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 02:00:21,750 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@d024de0 issued 4 check-sat command(s) [2020-07-20 02:00:21,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:21,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 02:00:21,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:21,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 02:00:21,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69135312] [2020-07-20 02:00:21,863 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:21,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531868972] [2020-07-20 02:00:21,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:21,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 02:00:21,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084404178] [2020-07-20 02:00:21,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 02:00:21,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:21,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 02:00:21,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-20 02:00:21,866 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 9 states. [2020-07-20 02:00:22,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:22,051 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-07-20 02:00:22,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 02:00:22,052 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-20 02:00:22,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:22,053 INFO L225 Difference]: With dead ends: 38 [2020-07-20 02:00:22,053 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 02:00:22,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-07-20 02:00:22,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 02:00:22,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-07-20 02:00:22,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 02:00:22,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-07-20 02:00:22,062 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 27 [2020-07-20 02:00:22,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:22,063 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-07-20 02:00:22,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 02:00:22,063 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-07-20 02:00:22,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 02:00:22,065 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:22,065 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:22,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:22,280 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:22,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:22,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1831429119, now seen corresponding path program 1 times [2020-07-20 02:00:22,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:22,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059557304] [2020-07-20 02:00:22,283 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:22,296 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:22,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965743137] [2020-07-20 02:00:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52ebb017 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:22,347 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52ebb017 issued 4 check-sat command(s) [2020-07-20 02:00:22,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:22,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 02:00:22,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 02:00:22,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059557304] [2020-07-20 02:00:22,408 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:22,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965743137] [2020-07-20 02:00:22,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:22,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-20 02:00:22,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326274910] [2020-07-20 02:00:22,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 02:00:22,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:22,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 02:00:22,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:00:22,411 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 6 states. [2020-07-20 02:00:22,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:22,497 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2020-07-20 02:00:22,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 02:00:22,497 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-07-20 02:00:22,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:22,499 INFO L225 Difference]: With dead ends: 51 [2020-07-20 02:00:22,499 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 02:00:22,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 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 02:00:22,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 02:00:22,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-07-20 02:00:22,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 02:00:22,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-07-20 02:00:22,510 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2020-07-20 02:00:22,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:22,510 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-07-20 02:00:22,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 02:00:22,511 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-07-20 02:00:22,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 02:00:22,512 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:22,512 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:22,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:22,726 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:22,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:22,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1774170817, now seen corresponding path program 1 times [2020-07-20 02:00:22,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:22,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913196934] [2020-07-20 02:00:22,727 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:22,739 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:22,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150073369] [2020-07-20 02:00:22,739 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4c80e0c 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 02:00:22,785 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4c80e0c issued 4 check-sat command(s) [2020-07-20 02:00:22,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:22,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 02:00:22,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 02:00:22,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913196934] [2020-07-20 02:00:22,896 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:22,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150073369] [2020-07-20 02:00:22,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:22,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-20 02:00:22,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811908996] [2020-07-20 02:00:22,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 02:00:22,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:22,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 02:00:22,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 02:00:22,899 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 7 states. [2020-07-20 02:00:25,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:25,018 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-07-20 02:00:25,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 02:00:25,019 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-07-20 02:00:25,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:25,023 INFO L225 Difference]: With dead ends: 47 [2020-07-20 02:00:25,024 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 02:00:25,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 02:00:25,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 02:00:25,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-20 02:00:25,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 02:00:25,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-07-20 02:00:25,057 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 29 [2020-07-20 02:00:25,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:25,058 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-07-20 02:00:25,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 02:00:25,058 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-07-20 02:00:25,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-20 02:00:25,060 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:25,060 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:25,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:25,276 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:25,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:25,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1738113013, now seen corresponding path program 1 times [2020-07-20 02:00:25,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:25,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151285736] [2020-07-20 02:00:25,277 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:25,286 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:25,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521066138] [2020-07-20 02:00:25,287 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b14b912 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:25,332 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b14b912 issued 4 check-sat command(s) [2020-07-20 02:00:25,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:25,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 02:00:25,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:25,415 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-20 02:00:25,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151285736] [2020-07-20 02:00:25,416 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:25,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521066138] [2020-07-20 02:00:25,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:25,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-20 02:00:25,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710365483] [2020-07-20 02:00:25,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 02:00:25,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:25,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 02:00:25,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 02:00:25,418 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 7 states. [2020-07-20 02:00:25,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:25,536 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-07-20 02:00:25,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 02:00:25,536 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-07-20 02:00:25,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:25,538 INFO L225 Difference]: With dead ends: 52 [2020-07-20 02:00:25,538 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 02:00:25,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-20 02:00:25,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 02:00:25,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-20 02:00:25,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 02:00:25,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-07-20 02:00:25,548 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 35 [2020-07-20 02:00:25,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:25,548 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-07-20 02:00:25,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 02:00:25,549 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-07-20 02:00:25,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-20 02:00:25,550 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:25,550 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:25,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 02:00:25,764 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:25,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:25,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1479947575, now seen corresponding path program 1 times [2020-07-20 02:00:25,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:25,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905824542] [2020-07-20 02:00:25,766 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:25,776 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:25,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197881064] [2020-07-20 02:00:25,777 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f746683 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 02:00:25,819 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f746683 issued 4 check-sat command(s) [2020-07-20 02:00:25,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:25,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 02:00:25,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 02:00:25,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905824542] [2020-07-20 02:00:25,950 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:25,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197881064] [2020-07-20 02:00:25,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:25,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 02:00:25,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804752640] [2020-07-20 02:00:25,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 02:00:25,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:25,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 02:00:25,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-20 02:00:25,953 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 8 states. [2020-07-20 02:00:28,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:28,132 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2020-07-20 02:00:28,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 02:00:28,134 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-07-20 02:00:28,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:28,135 INFO L225 Difference]: With dead ends: 51 [2020-07-20 02:00:28,135 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 02:00:28,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-20 02:00:28,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 02:00:28,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-20 02:00:28,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 02:00:28,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-07-20 02:00:28,145 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 35 [2020-07-20 02:00:28,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:28,146 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-07-20 02:00:28,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 02:00:28,146 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-07-20 02:00:28,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 02:00:28,148 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:28,148 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:28,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:28,359 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:28,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:28,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1286102758, now seen corresponding path program 2 times [2020-07-20 02:00:28,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:28,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538103019] [2020-07-20 02:00:28,362 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:28,372 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:28,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219916838] [2020-07-20 02:00:28,373 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4fd152e5 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:28,432 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4fd152e5 issued 4 check-sat command(s) [2020-07-20 02:00:28,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:28,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 02:00:28,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-20 02:00:28,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538103019] [2020-07-20 02:00:28,516 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:28,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219916838] [2020-07-20 02:00:28,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:28,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-20 02:00:28,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605116214] [2020-07-20 02:00:28,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 02:00:28,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:28,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 02:00:28,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 02:00:28,519 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 7 states. [2020-07-20 02:00:28,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:28,643 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2020-07-20 02:00:28,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 02:00:28,647 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-07-20 02:00:28,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:28,649 INFO L225 Difference]: With dead ends: 68 [2020-07-20 02:00:28,649 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 02:00:28,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 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 02:00:28,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 02:00:28,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-07-20 02:00:28,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 02:00:28,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-07-20 02:00:28,660 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 37 [2020-07-20 02:00:28,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:28,660 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-07-20 02:00:28,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 02:00:28,661 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-07-20 02:00:28,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 02:00:28,662 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:28,662 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:28,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:28,868 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:28,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:28,869 INFO L82 PathProgramCache]: Analyzing trace with hash 274985508, now seen corresponding path program 1 times [2020-07-20 02:00:28,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:28,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89277206] [2020-07-20 02:00:28,870 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:28,880 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:28,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101268984] [2020-07-20 02:00:28,881 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@646df69c 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 02:00:28,916 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@646df69c issued 4 check-sat command(s) [2020-07-20 02:00:28,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:28,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 02:00:28,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:29,005 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-20 02:00:29,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89277206] [2020-07-20 02:00:29,006 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:29,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101268984] [2020-07-20 02:00:29,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:29,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-20 02:00:29,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576641059] [2020-07-20 02:00:29,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 02:00:29,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:29,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 02:00:29,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 02:00:29,009 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 7 states. [2020-07-20 02:00:29,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:29,151 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2020-07-20 02:00:29,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 02:00:29,152 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-07-20 02:00:29,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:29,154 INFO L225 Difference]: With dead ends: 84 [2020-07-20 02:00:29,154 INFO L226 Difference]: Without dead ends: 68 [2020-07-20 02:00:29,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 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 02:00:29,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-20 02:00:29,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-07-20 02:00:29,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-20 02:00:29,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-07-20 02:00:29,166 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 37 [2020-07-20 02:00:29,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:29,167 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-07-20 02:00:29,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 02:00:29,167 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-07-20 02:00:29,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 02:00:29,169 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:29,169 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:29,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-20 02:00:29,384 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:29,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:29,384 INFO L82 PathProgramCache]: Analyzing trace with hash 584019147, now seen corresponding path program 3 times [2020-07-20 02:00:29,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:29,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21330908] [2020-07-20 02:00:29,385 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:29,398 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:29,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059089602] [2020-07-20 02:00:29,399 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@25cb9f5d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:29,441 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@25cb9f5d issued 4 check-sat command(s) [2020-07-20 02:00:29,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:29,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 02:00:29,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:29,573 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 02:00:29,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21330908] [2020-07-20 02:00:29,573 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:29,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059089602] [2020-07-20 02:00:29,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:29,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 02:00:29,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737674821] [2020-07-20 02:00:29,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 02:00:29,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:29,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 02:00:29,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-20 02:00:29,576 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 8 states. [2020-07-20 02:00:29,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:29,730 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2020-07-20 02:00:29,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 02:00:29,732 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-07-20 02:00:29,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:29,734 INFO L225 Difference]: With dead ends: 92 [2020-07-20 02:00:29,734 INFO L226 Difference]: Without dead ends: 76 [2020-07-20 02:00:29,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-20 02:00:29,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-20 02:00:29,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-07-20 02:00:29,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-20 02:00:29,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-07-20 02:00:29,747 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 45 [2020-07-20 02:00:29,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:29,747 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-07-20 02:00:29,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 02:00:29,748 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-07-20 02:00:29,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 02:00:29,749 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:29,750 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:29,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:29,963 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:29,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:29,964 INFO L82 PathProgramCache]: Analyzing trace with hash -208243385, now seen corresponding path program 2 times [2020-07-20 02:00:29,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:29,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613511629] [2020-07-20 02:00:29,966 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:29,976 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:29,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485106152] [2020-07-20 02:00:29,977 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@648f58dd 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 02:00:30,013 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@648f58dd issued 4 check-sat command(s) [2020-07-20 02:00:30,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:30,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 02:00:30,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 02:00:30,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613511629] [2020-07-20 02:00:30,129 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:30,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485106152] [2020-07-20 02:00:30,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:30,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 02:00:30,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869820560] [2020-07-20 02:00:30,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 02:00:30,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:30,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 02:00:30,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-20 02:00:30,131 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 8 states. [2020-07-20 02:00:30,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:30,328 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2020-07-20 02:00:30,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 02:00:30,328 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-07-20 02:00:30,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:30,330 INFO L225 Difference]: With dead ends: 108 [2020-07-20 02:00:30,330 INFO L226 Difference]: Without dead ends: 92 [2020-07-20 02:00:30,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-20 02:00:30,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-20 02:00:30,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2020-07-20 02:00:30,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-20 02:00:30,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-07-20 02:00:30,344 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 45 [2020-07-20 02:00:30,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:30,344 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-07-20 02:00:30,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 02:00:30,344 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-07-20 02:00:30,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 02:00:30,346 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:30,347 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:30,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:30,563 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:30,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:30,563 INFO L82 PathProgramCache]: Analyzing trace with hash -53426768, now seen corresponding path program 4 times [2020-07-20 02:00:30,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:30,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304584265] [2020-07-20 02:00:30,564 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:30,572 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:30,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48312103] [2020-07-20 02:00:30,573 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7c25c040 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:30,617 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7c25c040 issued 4 check-sat command(s) [2020-07-20 02:00:30,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:30,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-20 02:00:30,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-20 02:00:30,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304584265] [2020-07-20 02:00:30,784 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:30,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48312103] [2020-07-20 02:00:30,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:30,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 02:00:30,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463764095] [2020-07-20 02:00:30,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 02:00:30,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:30,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 02:00:30,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 02:00:30,787 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 9 states. [2020-07-20 02:00:30,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:30,992 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2020-07-20 02:00:30,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 02:00:30,994 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-07-20 02:00:30,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:30,996 INFO L225 Difference]: With dead ends: 108 [2020-07-20 02:00:30,996 INFO L226 Difference]: Without dead ends: 92 [2020-07-20 02:00:30,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-20 02:00:30,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-20 02:00:31,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-07-20 02:00:31,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-07-20 02:00:31,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2020-07-20 02:00:31,009 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 53 [2020-07-20 02:00:31,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:31,009 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2020-07-20 02:00:31,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 02:00:31,009 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2020-07-20 02:00:31,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 02:00:31,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:31,011 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:31,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-20 02:00:31,227 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:31,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:31,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1041911764, now seen corresponding path program 3 times [2020-07-20 02:00:31,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:31,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914806393] [2020-07-20 02:00:31,230 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:31,238 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:31,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113892920] [2020-07-20 02:00:31,239 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@12e65304 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 02:00:31,284 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@12e65304 issued 4 check-sat command(s) [2020-07-20 02:00:31,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:31,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 02:00:31,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-20 02:00:31,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914806393] [2020-07-20 02:00:31,460 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:31,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113892920] [2020-07-20 02:00:31,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:31,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 02:00:31,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641999591] [2020-07-20 02:00:31,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 02:00:31,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:31,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 02:00:31,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 02:00:31,465 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand 9 states. [2020-07-20 02:00:31,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:31,691 INFO L93 Difference]: Finished difference Result 124 states and 135 transitions. [2020-07-20 02:00:31,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 02:00:31,693 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-07-20 02:00:31,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:31,695 INFO L225 Difference]: With dead ends: 124 [2020-07-20 02:00:31,695 INFO L226 Difference]: Without dead ends: 108 [2020-07-20 02:00:31,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-20 02:00:31,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-20 02:00:31,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2020-07-20 02:00:31,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-20 02:00:31,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2020-07-20 02:00:31,709 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 53 [2020-07-20 02:00:31,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:31,709 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2020-07-20 02:00:31,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 02:00:31,710 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2020-07-20 02:00:31,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 02:00:31,711 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:31,711 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:31,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-20 02:00:31,927 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:31,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:31,928 INFO L82 PathProgramCache]: Analyzing trace with hash -823057046, now seen corresponding path program 4 times [2020-07-20 02:00:31,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:31,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365651701] [2020-07-20 02:00:31,929 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:31,938 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:31,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105979518] [2020-07-20 02:00:31,939 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5d4ff3d6 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:31,978 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5d4ff3d6 issued 4 check-sat command(s) [2020-07-20 02:00:31,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:31,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-20 02:00:31,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:32,155 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-20 02:00:32,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365651701] [2020-07-20 02:00:32,156 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:32,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105979518] [2020-07-20 02:00:32,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:32,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 02:00:32,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86073175] [2020-07-20 02:00:32,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 02:00:32,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:32,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 02:00:32,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 02:00:32,158 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand 9 states. [2020-07-20 02:00:32,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:32,388 INFO L93 Difference]: Finished difference Result 138 states and 150 transitions. [2020-07-20 02:00:32,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 02:00:32,388 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-07-20 02:00:32,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:32,390 INFO L225 Difference]: With dead ends: 138 [2020-07-20 02:00:32,390 INFO L226 Difference]: Without dead ends: 122 [2020-07-20 02:00:32,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-20 02:00:32,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-20 02:00:32,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 112. [2020-07-20 02:00:32,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-20 02:00:32,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2020-07-20 02:00:32,405 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 53 [2020-07-20 02:00:32,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:32,405 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2020-07-20 02:00:32,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 02:00:32,406 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2020-07-20 02:00:32,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 02:00:32,407 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:32,407 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:32,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-20 02:00:32,623 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:32,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:32,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1831954837, now seen corresponding path program 5 times [2020-07-20 02:00:32,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:32,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816278462] [2020-07-20 02:00:32,625 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:32,634 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:32,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175697163] [2020-07-20 02:00:32,634 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@280673d2 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 02:00:32,678 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@280673d2 issued 4 check-sat command(s) [2020-07-20 02:00:32,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:32,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-20 02:00:32,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:32,875 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-07-20 02:00:32,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816278462] [2020-07-20 02:00:32,876 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:32,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175697163] [2020-07-20 02:00:32,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:32,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-20 02:00:32,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904973755] [2020-07-20 02:00:32,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 02:00:32,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:32,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 02:00:32,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-07-20 02:00:32,878 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand 10 states. [2020-07-20 02:00:33,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:33,128 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2020-07-20 02:00:33,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 02:00:33,135 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-07-20 02:00:33,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:33,137 INFO L225 Difference]: With dead ends: 136 [2020-07-20 02:00:33,137 INFO L226 Difference]: Without dead ends: 120 [2020-07-20 02:00:33,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-07-20 02:00:33,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-07-20 02:00:33,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-07-20 02:00:33,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-20 02:00:33,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128 transitions. [2020-07-20 02:00:33,153 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 128 transitions. Word has length 61 [2020-07-20 02:00:33,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:33,154 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 128 transitions. [2020-07-20 02:00:33,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 02:00:33,154 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 128 transitions. [2020-07-20 02:00:33,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 02:00:33,155 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:33,155 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:33,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:33,371 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:33,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:33,372 INFO L82 PathProgramCache]: Analyzing trace with hash 10333007, now seen corresponding path program 5 times [2020-07-20 02:00:33,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:33,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832063324] [2020-07-20 02:00:33,373 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:33,381 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:33,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056966208] [2020-07-20 02:00:33,381 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49f6f3cb No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:33,413 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49f6f3cb issued 1 check-sat command(s) [2020-07-20 02:00:33,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:33,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 02:00:33,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-07-20 02:00:33,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832063324] [2020-07-20 02:00:33,483 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:33,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056966208] [2020-07-20 02:00:33,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:33,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-20 02:00:33,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429767246] [2020-07-20 02:00:33,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 02:00:33,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:33,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 02:00:33,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-20 02:00:33,486 INFO L87 Difference]: Start difference. First operand 120 states and 128 transitions. Second operand 7 states. [2020-07-20 02:00:33,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:33,600 INFO L93 Difference]: Finished difference Result 160 states and 180 transitions. [2020-07-20 02:00:33,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 02:00:33,601 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 61 [2020-07-20 02:00:33,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:33,603 INFO L225 Difference]: With dead ends: 160 [2020-07-20 02:00:33,603 INFO L226 Difference]: Without dead ends: 140 [2020-07-20 02:00:33,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-20 02:00:33,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-20 02:00:33,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2020-07-20 02:00:33,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-07-20 02:00:33,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 153 transitions. [2020-07-20 02:00:33,618 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 153 transitions. Word has length 61 [2020-07-20 02:00:33,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:33,619 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 153 transitions. [2020-07-20 02:00:33,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 02:00:33,619 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 153 transitions. [2020-07-20 02:00:33,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 02:00:33,620 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:33,621 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:33,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-20 02:00:33,834 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:33,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:33,835 INFO L82 PathProgramCache]: Analyzing trace with hash -185889457, now seen corresponding path program 6 times [2020-07-20 02:00:33,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:33,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590408287] [2020-07-20 02:00:33,836 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:33,844 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:33,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2029287952] [2020-07-20 02:00:33,844 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@64f8bcaf 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 02:00:33,878 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@64f8bcaf issued 1 check-sat command(s) [2020-07-20 02:00:33,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:33,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 02:00:33,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:33,939 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-07-20 02:00:33,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590408287] [2020-07-20 02:00:33,940 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:33,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029287952] [2020-07-20 02:00:33,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:33,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-20 02:00:33,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817725963] [2020-07-20 02:00:33,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 02:00:33,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:33,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 02:00:33,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-20 02:00:33,942 INFO L87 Difference]: Start difference. First operand 138 states and 153 transitions. Second operand 7 states. [2020-07-20 02:00:34,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:34,046 INFO L93 Difference]: Finished difference Result 158 states and 174 transitions. [2020-07-20 02:00:34,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 02:00:34,049 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 61 [2020-07-20 02:00:34,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:34,050 INFO L225 Difference]: With dead ends: 158 [2020-07-20 02:00:34,050 INFO L226 Difference]: Without dead ends: 140 [2020-07-20 02:00:34,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-20 02:00:34,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-20 02:00:34,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 136. [2020-07-20 02:00:34,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-20 02:00:34,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 149 transitions. [2020-07-20 02:00:34,064 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 149 transitions. Word has length 61 [2020-07-20 02:00:34,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:34,064 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 149 transitions. [2020-07-20 02:00:34,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 02:00:34,065 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 149 transitions. [2020-07-20 02:00:34,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 02:00:34,066 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:34,066 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:34,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-20 02:00:34,281 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:34,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:34,282 INFO L82 PathProgramCache]: Analyzing trace with hash 32965261, now seen corresponding path program 7 times [2020-07-20 02:00:34,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:34,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362129295] [2020-07-20 02:00:34,283 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:34,290 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:34,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [623346039] [2020-07-20 02:00:34,291 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72c0b6ef No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:34,327 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72c0b6ef issued 4 check-sat command(s) [2020-07-20 02:00:34,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:34,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-20 02:00:34,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-07-20 02:00:34,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362129295] [2020-07-20 02:00:34,521 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:34,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623346039] [2020-07-20 02:00:34,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:34,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-20 02:00:34,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036289850] [2020-07-20 02:00:34,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 02:00:34,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:34,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 02:00:34,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-07-20 02:00:34,526 INFO L87 Difference]: Start difference. First operand 136 states and 149 transitions. Second operand 10 states. [2020-07-20 02:00:34,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:34,823 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2020-07-20 02:00:34,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 02:00:34,823 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-07-20 02:00:34,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:34,825 INFO L225 Difference]: With dead ends: 154 [2020-07-20 02:00:34,825 INFO L226 Difference]: Without dead ends: 152 [2020-07-20 02:00:34,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-07-20 02:00:34,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-20 02:00:34,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2020-07-20 02:00:34,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-07-20 02:00:34,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 164 transitions. [2020-07-20 02:00:34,839 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 164 transitions. Word has length 61 [2020-07-20 02:00:34,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:34,840 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 164 transitions. [2020-07-20 02:00:34,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 02:00:34,840 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 164 transitions. [2020-07-20 02:00:34,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-20 02:00:34,841 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:34,842 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:35,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-20 02:00:35,055 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:35,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:35,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1317644166, now seen corresponding path program 6 times [2020-07-20 02:00:35,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:35,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745937507] [2020-07-20 02:00:35,057 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:35,064 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:35,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930113056] [2020-07-20 02:00:35,065 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31de35b 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 02:00:35,105 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31de35b issued 4 check-sat command(s) [2020-07-20 02:00:35,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:35,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-20 02:00:35,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:35,336 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-07-20 02:00:35,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745937507] [2020-07-20 02:00:35,337 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:35,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930113056] [2020-07-20 02:00:35,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:35,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-20 02:00:35,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478712400] [2020-07-20 02:00:35,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 02:00:35,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:35,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 02:00:35,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-07-20 02:00:35,341 INFO L87 Difference]: Start difference. First operand 150 states and 164 transitions. Second operand 11 states. [2020-07-20 02:00:35,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:35,697 INFO L93 Difference]: Finished difference Result 178 states and 195 transitions. [2020-07-20 02:00:35,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 02:00:35,698 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-07-20 02:00:35,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:35,699 INFO L225 Difference]: With dead ends: 178 [2020-07-20 02:00:35,699 INFO L226 Difference]: Without dead ends: 160 [2020-07-20 02:00:35,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-07-20 02:00:35,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-07-20 02:00:35,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2020-07-20 02:00:35,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-07-20 02:00:35,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 172 transitions. [2020-07-20 02:00:35,713 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 172 transitions. Word has length 69 [2020-07-20 02:00:35,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:35,714 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 172 transitions. [2020-07-20 02:00:35,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 02:00:35,714 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 172 transitions. [2020-07-20 02:00:35,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-20 02:00:35,716 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:35,716 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:35,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:35,925 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:35,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:35,926 INFO L82 PathProgramCache]: Analyzing trace with hash -377856460, now seen corresponding path program 8 times [2020-07-20 02:00:35,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:35,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981883352] [2020-07-20 02:00:35,927 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:35,934 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:35,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688860967] [2020-07-20 02:00:35,935 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40529e4b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:35,984 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40529e4b issued 4 check-sat command(s) [2020-07-20 02:00:35,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:35,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-20 02:00:35,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-07-20 02:00:36,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981883352] [2020-07-20 02:00:36,274 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:36,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688860967] [2020-07-20 02:00:36,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:36,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-20 02:00:36,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355402723] [2020-07-20 02:00:36,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 02:00:36,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:36,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 02:00:36,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-07-20 02:00:36,276 INFO L87 Difference]: Start difference. First operand 158 states and 172 transitions. Second operand 11 states. [2020-07-20 02:00:36,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:36,599 INFO L93 Difference]: Finished difference Result 188 states and 206 transitions. [2020-07-20 02:00:36,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 02:00:36,602 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-07-20 02:00:36,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:36,604 INFO L225 Difference]: With dead ends: 188 [2020-07-20 02:00:36,604 INFO L226 Difference]: Without dead ends: 170 [2020-07-20 02:00:36,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-07-20 02:00:36,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-07-20 02:00:36,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2020-07-20 02:00:36,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-07-20 02:00:36,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 185 transitions. [2020-07-20 02:00:36,619 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 185 transitions. Word has length 69 [2020-07-20 02:00:36,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:36,619 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 185 transitions. [2020-07-20 02:00:36,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 02:00:36,619 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 185 transitions. [2020-07-20 02:00:36,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-20 02:00:36,621 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:36,621 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:36,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:36,835 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:36,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:36,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1210993294, now seen corresponding path program 9 times [2020-07-20 02:00:36,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:36,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312370438] [2020-07-20 02:00:36,837 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:36,843 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:36,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051637880] [2020-07-20 02:00:36,844 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@70cf8ac4 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 02:00:36,894 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@70cf8ac4 issued 4 check-sat command(s) [2020-07-20 02:00:36,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:36,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-20 02:00:36,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-07-20 02:00:37,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312370438] [2020-07-20 02:00:37,189 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:37,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051637880] [2020-07-20 02:00:37,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:37,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-20 02:00:37,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287176753] [2020-07-20 02:00:37,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 02:00:37,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:37,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 02:00:37,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-07-20 02:00:37,191 INFO L87 Difference]: Start difference. First operand 170 states and 185 transitions. Second operand 11 states. [2020-07-20 02:00:37,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:37,567 INFO L93 Difference]: Finished difference Result 190 states and 208 transitions. [2020-07-20 02:00:37,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 02:00:37,569 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-07-20 02:00:37,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:37,571 INFO L225 Difference]: With dead ends: 190 [2020-07-20 02:00:37,571 INFO L226 Difference]: Without dead ends: 188 [2020-07-20 02:00:37,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-07-20 02:00:37,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-07-20 02:00:37,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 178. [2020-07-20 02:00:37,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-07-20 02:00:37,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 195 transitions. [2020-07-20 02:00:37,592 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 195 transitions. Word has length 69 [2020-07-20 02:00:37,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:37,593 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 195 transitions. [2020-07-20 02:00:37,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 02:00:37,593 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 195 transitions. [2020-07-20 02:00:37,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-20 02:00:37,595 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:37,595 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:37,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-20 02:00:37,809 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:37,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:37,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1188361040, now seen corresponding path program 10 times [2020-07-20 02:00:37,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:37,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989398391] [2020-07-20 02:00:37,811 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:37,820 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:37,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252843560] [2020-07-20 02:00:37,820 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@115e0278 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:37,861 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@115e0278 issued 4 check-sat command(s) [2020-07-20 02:00:37,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:37,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-20 02:00:37,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:38,167 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-07-20 02:00:38,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989398391] [2020-07-20 02:00:38,169 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:38,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252843560] [2020-07-20 02:00:38,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:38,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-20 02:00:38,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736592794] [2020-07-20 02:00:38,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 02:00:38,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:38,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 02:00:38,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-07-20 02:00:38,172 INFO L87 Difference]: Start difference. First operand 178 states and 195 transitions. Second operand 11 states. [2020-07-20 02:00:38,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:38,647 INFO L93 Difference]: Finished difference Result 198 states and 217 transitions. [2020-07-20 02:00:38,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 02:00:38,651 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-07-20 02:00:38,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:38,653 INFO L225 Difference]: With dead ends: 198 [2020-07-20 02:00:38,653 INFO L226 Difference]: Without dead ends: 196 [2020-07-20 02:00:38,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-07-20 02:00:38,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-07-20 02:00:38,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 186. [2020-07-20 02:00:38,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-07-20 02:00:38,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 204 transitions. [2020-07-20 02:00:38,682 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 204 transitions. Word has length 69 [2020-07-20 02:00:38,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:38,682 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 204 transitions. [2020-07-20 02:00:38,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 02:00:38,683 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 204 transitions. [2020-07-20 02:00:38,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-07-20 02:00:38,689 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:38,689 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:38,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-07-20 02:00:38,906 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:38,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:38,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1306226081, now seen corresponding path program 7 times [2020-07-20 02:00:38,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:38,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007950445] [2020-07-20 02:00:38,907 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:38,922 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:38,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707925845] [2020-07-20 02:00:38,923 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66a7d493 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 02:00:38,976 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66a7d493 issued 4 check-sat command(s) [2020-07-20 02:00:38,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:38,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-20 02:00:38,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 14 proven. 98 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-07-20 02:00:39,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007950445] [2020-07-20 02:00:39,291 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:39,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707925845] [2020-07-20 02:00:39,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:39,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-20 02:00:39,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557349539] [2020-07-20 02:00:39,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 02:00:39,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:39,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 02:00:39,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-07-20 02:00:39,293 INFO L87 Difference]: Start difference. First operand 186 states and 204 transitions. Second operand 12 states. [2020-07-20 02:00:39,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:39,679 INFO L93 Difference]: Finished difference Result 214 states and 235 transitions. [2020-07-20 02:00:39,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 02:00:39,680 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 77 [2020-07-20 02:00:39,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:39,682 INFO L225 Difference]: With dead ends: 214 [2020-07-20 02:00:39,683 INFO L226 Difference]: Without dead ends: 196 [2020-07-20 02:00:39,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-07-20 02:00:39,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-07-20 02:00:39,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2020-07-20 02:00:39,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-07-20 02:00:39,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 212 transitions. [2020-07-20 02:00:39,699 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 212 transitions. Word has length 77 [2020-07-20 02:00:39,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:39,699 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 212 transitions. [2020-07-20 02:00:39,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 02:00:39,700 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 212 transitions. [2020-07-20 02:00:39,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-07-20 02:00:39,701 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:39,701 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:39,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:39,917 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:39,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:39,918 INFO L82 PathProgramCache]: Analyzing trace with hash 728435349, now seen corresponding path program 11 times [2020-07-20 02:00:39,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:39,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160622514] [2020-07-20 02:00:39,919 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:39,924 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:39,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694793527] [2020-07-20 02:00:39,925 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49c38561 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:39,954 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49c38561 issued 1 check-sat command(s) [2020-07-20 02:00:39,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:39,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 02:00:39,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:40,042 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 52 proven. 60 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-07-20 02:00:40,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160622514] [2020-07-20 02:00:40,042 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:40,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694793527] [2020-07-20 02:00:40,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:40,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 02:00:40,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952323208] [2020-07-20 02:00:40,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 02:00:40,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:40,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 02:00:40,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-20 02:00:40,045 INFO L87 Difference]: Start difference. First operand 194 states and 212 transitions. Second operand 9 states. [2020-07-20 02:00:40,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:40,174 INFO L93 Difference]: Finished difference Result 242 states and 272 transitions. [2020-07-20 02:00:40,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 02:00:40,176 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-07-20 02:00:40,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:40,178 INFO L225 Difference]: With dead ends: 242 [2020-07-20 02:00:40,178 INFO L226 Difference]: Without dead ends: 216 [2020-07-20 02:00:40,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-07-20 02:00:40,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-07-20 02:00:40,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2020-07-20 02:00:40,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-07-20 02:00:40,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 238 transitions. [2020-07-20 02:00:40,198 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 238 transitions. Word has length 77 [2020-07-20 02:00:40,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:40,199 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 238 transitions. [2020-07-20 02:00:40,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 02:00:40,199 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 238 transitions. [2020-07-20 02:00:40,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-07-20 02:00:40,200 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:40,200 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:40,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-07-20 02:00:40,412 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:40,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:40,413 INFO L82 PathProgramCache]: Analyzing trace with hash -323556203, now seen corresponding path program 12 times [2020-07-20 02:00:40,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:40,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25450173] [2020-07-20 02:00:40,414 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:40,428 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:40,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692631591] [2020-07-20 02:00:40,428 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@46f79a5a 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 02:00:40,471 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@46f79a5a issued 1 check-sat command(s) [2020-07-20 02:00:40,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:40,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 02:00:40,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 52 proven. 60 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-07-20 02:00:40,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25450173] [2020-07-20 02:00:40,544 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:40,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692631591] [2020-07-20 02:00:40,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:40,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 02:00:40,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379853703] [2020-07-20 02:00:40,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 02:00:40,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:40,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 02:00:40,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-20 02:00:40,546 INFO L87 Difference]: Start difference. First operand 214 states and 238 transitions. Second operand 9 states. [2020-07-20 02:00:40,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:40,693 INFO L93 Difference]: Finished difference Result 238 states and 263 transitions. [2020-07-20 02:00:40,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 02:00:40,695 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-07-20 02:00:40,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:40,697 INFO L225 Difference]: With dead ends: 238 [2020-07-20 02:00:40,697 INFO L226 Difference]: Without dead ends: 216 [2020-07-20 02:00:40,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-07-20 02:00:40,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-07-20 02:00:40,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2020-07-20 02:00:40,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-07-20 02:00:40,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 237 transitions. [2020-07-20 02:00:40,719 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 237 transitions. Word has length 77 [2020-07-20 02:00:40,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:40,719 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 237 transitions. [2020-07-20 02:00:40,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 02:00:40,719 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 237 transitions. [2020-07-20 02:00:40,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-07-20 02:00:40,721 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:40,721 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:40,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:40,928 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:40,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:40,929 INFO L82 PathProgramCache]: Analyzing trace with hash -300923949, now seen corresponding path program 13 times [2020-07-20 02:00:40,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:40,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929902103] [2020-07-20 02:00:40,929 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:40,935 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:40,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2120173754] [2020-07-20 02:00:40,935 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24e16691 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:40,970 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24e16691 issued 4 check-sat command(s) [2020-07-20 02:00:40,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:40,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-20 02:00:40,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:41,262 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 14 proven. 98 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-07-20 02:00:41,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929902103] [2020-07-20 02:00:41,263 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:41,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120173754] [2020-07-20 02:00:41,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:41,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-20 02:00:41,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934270129] [2020-07-20 02:00:41,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 02:00:41,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:41,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 02:00:41,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-07-20 02:00:41,265 INFO L87 Difference]: Start difference. First operand 214 states and 237 transitions. Second operand 12 states. [2020-07-20 02:00:41,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:41,745 INFO L93 Difference]: Finished difference Result 232 states and 256 transitions. [2020-07-20 02:00:41,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 02:00:41,746 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 77 [2020-07-20 02:00:41,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:41,748 INFO L225 Difference]: With dead ends: 232 [2020-07-20 02:00:41,748 INFO L226 Difference]: Without dead ends: 230 [2020-07-20 02:00:41,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-07-20 02:00:41,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-07-20 02:00:41,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 228. [2020-07-20 02:00:41,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-07-20 02:00:41,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 252 transitions. [2020-07-20 02:00:41,769 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 252 transitions. Word has length 77 [2020-07-20 02:00:41,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:41,769 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 252 transitions. [2020-07-20 02:00:41,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 02:00:41,769 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 252 transitions. [2020-07-20 02:00:41,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-20 02:00:41,771 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:41,771 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:41,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-07-20 02:00:41,986 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:41,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:41,986 INFO L82 PathProgramCache]: Analyzing trace with hash 46208836, now seen corresponding path program 8 times [2020-07-20 02:00:41,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:41,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232039660] [2020-07-20 02:00:41,987 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:41,996 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:41,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1921674875] [2020-07-20 02:00:41,997 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@54310340 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 02:00:42,044 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@54310340 issued 4 check-sat command(s) [2020-07-20 02:00:42,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:42,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 45 conjunts are in the unsatisfiable core [2020-07-20 02:00:42,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:42,368 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 128 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-07-20 02:00:42,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232039660] [2020-07-20 02:00:42,369 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:42,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921674875] [2020-07-20 02:00:42,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:42,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-20 02:00:42,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619057110] [2020-07-20 02:00:42,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 02:00:42,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:42,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 02:00:42,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-07-20 02:00:42,371 INFO L87 Difference]: Start difference. First operand 228 states and 252 transitions. Second operand 13 states. [2020-07-20 02:00:42,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:42,903 INFO L93 Difference]: Finished difference Result 256 states and 283 transitions. [2020-07-20 02:00:42,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 02:00:42,907 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 85 [2020-07-20 02:00:42,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:42,909 INFO L225 Difference]: With dead ends: 256 [2020-07-20 02:00:42,909 INFO L226 Difference]: Without dead ends: 238 [2020-07-20 02:00:42,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-07-20 02:00:42,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-07-20 02:00:42,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2020-07-20 02:00:42,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-07-20 02:00:42,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 260 transitions. [2020-07-20 02:00:42,929 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 260 transitions. Word has length 85 [2020-07-20 02:00:42,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:42,929 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 260 transitions. [2020-07-20 02:00:42,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 02:00:42,930 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 260 transitions. [2020-07-20 02:00:42,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-20 02:00:42,931 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:42,931 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:43,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-07-20 02:00:43,145 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:43,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:43,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1665268796, now seen corresponding path program 14 times [2020-07-20 02:00:43,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:43,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379296064] [2020-07-20 02:00:43,147 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:43,154 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:43,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1492506166] [2020-07-20 02:00:43,155 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@32397cc No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:43,224 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@32397cc issued 4 check-sat command(s) [2020-07-20 02:00:43,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:43,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-20 02:00:43,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:43,671 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 128 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-07-20 02:00:43,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379296064] [2020-07-20 02:00:43,672 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:43,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492506166] [2020-07-20 02:00:43,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:43,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-20 02:00:43,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165491356] [2020-07-20 02:00:43,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 02:00:43,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:43,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 02:00:43,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-07-20 02:00:43,674 INFO L87 Difference]: Start difference. First operand 236 states and 260 transitions. Second operand 13 states. [2020-07-20 02:00:44,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:44,149 INFO L93 Difference]: Finished difference Result 266 states and 294 transitions. [2020-07-20 02:00:44,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 02:00:44,152 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 85 [2020-07-20 02:00:44,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:44,154 INFO L225 Difference]: With dead ends: 266 [2020-07-20 02:00:44,154 INFO L226 Difference]: Without dead ends: 248 [2020-07-20 02:00:44,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-07-20 02:00:44,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-07-20 02:00:44,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2020-07-20 02:00:44,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-07-20 02:00:44,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 273 transitions. [2020-07-20 02:00:44,174 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 273 transitions. Word has length 85 [2020-07-20 02:00:44,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:44,175 INFO L479 AbstractCegarLoop]: Abstraction has 248 states and 273 transitions. [2020-07-20 02:00:44,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 02:00:44,175 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 273 transitions. [2020-07-20 02:00:44,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-20 02:00:44,176 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:44,177 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:44,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-07-20 02:00:44,392 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:44,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:44,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1534824776, now seen corresponding path program 15 times [2020-07-20 02:00:44,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:44,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616619445] [2020-07-20 02:00:44,394 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:44,400 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:44,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875340527] [2020-07-20 02:00:44,401 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52569177 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 02:00:44,450 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52569177 issued 4 check-sat command(s) [2020-07-20 02:00:44,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:44,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-20 02:00:44,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:44,825 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 128 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-07-20 02:00:44,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616619445] [2020-07-20 02:00:44,826 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:44,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875340527] [2020-07-20 02:00:44,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:44,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-20 02:00:44,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145504719] [2020-07-20 02:00:44,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 02:00:44,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:44,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 02:00:44,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-07-20 02:00:44,828 INFO L87 Difference]: Start difference. First operand 248 states and 273 transitions. Second operand 13 states. [2020-07-20 02:00:45,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:45,336 INFO L93 Difference]: Finished difference Result 272 states and 301 transitions. [2020-07-20 02:00:45,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 02:00:45,339 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 85 [2020-07-20 02:00:45,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:45,341 INFO L225 Difference]: With dead ends: 272 [2020-07-20 02:00:45,341 INFO L226 Difference]: Without dead ends: 270 [2020-07-20 02:00:45,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-07-20 02:00:45,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-07-20 02:00:45,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 260. [2020-07-20 02:00:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-07-20 02:00:45,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 288 transitions. [2020-07-20 02:00:45,360 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 288 transitions. Word has length 85 [2020-07-20 02:00:45,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:45,360 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 288 transitions. [2020-07-20 02:00:45,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 02:00:45,360 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 288 transitions. [2020-07-20 02:00:45,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-20 02:00:45,362 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:45,362 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:45,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-07-20 02:00:45,578 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:45,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:45,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1730783222, now seen corresponding path program 16 times [2020-07-20 02:00:45,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:45,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895805114] [2020-07-20 02:00:45,579 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:45,585 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:45,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [308296249] [2020-07-20 02:00:45,585 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e3ae831 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:45,640 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e3ae831 issued 4 check-sat command(s) [2020-07-20 02:00:45,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:45,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 45 conjunts are in the unsatisfiable core [2020-07-20 02:00:45,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:45,983 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 128 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-07-20 02:00:45,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895805114] [2020-07-20 02:00:45,984 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:45,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308296249] [2020-07-20 02:00:45,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:45,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-20 02:00:45,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754525840] [2020-07-20 02:00:45,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 02:00:45,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:45,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 02:00:45,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-07-20 02:00:45,986 INFO L87 Difference]: Start difference. First operand 260 states and 288 transitions. Second operand 13 states. [2020-07-20 02:00:46,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:46,514 INFO L93 Difference]: Finished difference Result 280 states and 310 transitions. [2020-07-20 02:00:46,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 02:00:46,514 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 85 [2020-07-20 02:00:46,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:46,516 INFO L225 Difference]: With dead ends: 280 [2020-07-20 02:00:46,516 INFO L226 Difference]: Without dead ends: 278 [2020-07-20 02:00:46,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-07-20 02:00:46,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-07-20 02:00:46,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 268. [2020-07-20 02:00:46,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-07-20 02:00:46,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 297 transitions. [2020-07-20 02:00:46,534 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 297 transitions. Word has length 85 [2020-07-20 02:00:46,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:46,535 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 297 transitions. [2020-07-20 02:00:46,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 02:00:46,535 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 297 transitions. [2020-07-20 02:00:46,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-20 02:00:46,536 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:46,537 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:46,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:46,752 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:46,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:46,753 INFO L82 PathProgramCache]: Analyzing trace with hash -506403031, now seen corresponding path program 9 times [2020-07-20 02:00:46,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:46,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670800716] [2020-07-20 02:00:46,754 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:46,761 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:46,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [656765291] [2020-07-20 02:00:46,761 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@cc1190a 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 02:00:46,828 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@cc1190a issued 4 check-sat command(s) [2020-07-20 02:00:46,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:46,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 49 conjunts are in the unsatisfiable core [2020-07-20 02:00:46,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:47,325 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 18 proven. 162 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-07-20 02:00:47,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670800716] [2020-07-20 02:00:47,326 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:47,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656765291] [2020-07-20 02:00:47,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:47,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-20 02:00:47,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602323667] [2020-07-20 02:00:47,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 02:00:47,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:47,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 02:00:47,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-07-20 02:00:47,327 INFO L87 Difference]: Start difference. First operand 268 states and 297 transitions. Second operand 14 states. [2020-07-20 02:00:47,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:47,874 INFO L93 Difference]: Finished difference Result 296 states and 328 transitions. [2020-07-20 02:00:47,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 02:00:47,874 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 93 [2020-07-20 02:00:47,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:47,876 INFO L225 Difference]: With dead ends: 296 [2020-07-20 02:00:47,877 INFO L226 Difference]: Without dead ends: 278 [2020-07-20 02:00:47,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-07-20 02:00:47,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-07-20 02:00:47,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 276. [2020-07-20 02:00:47,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-07-20 02:00:47,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 305 transitions. [2020-07-20 02:00:47,894 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 305 transitions. Word has length 93 [2020-07-20 02:00:47,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:47,895 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 305 transitions. [2020-07-20 02:00:47,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 02:00:47,895 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 305 transitions. [2020-07-20 02:00:47,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-20 02:00:47,896 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:47,896 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:48,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:48,111 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:48,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:48,112 INFO L82 PathProgramCache]: Analyzing trace with hash -2106989411, now seen corresponding path program 17 times [2020-07-20 02:00:48,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:48,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105795988] [2020-07-20 02:00:48,113 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:48,118 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:48,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629791808] [2020-07-20 02:00:48,119 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@672e9eb9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:48,169 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@672e9eb9 issued 4 check-sat command(s) [2020-07-20 02:00:48,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:48,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-20 02:00:48,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:48,719 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 18 proven. 162 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-07-20 02:00:48,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105795988] [2020-07-20 02:00:48,719 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:48,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629791808] [2020-07-20 02:00:48,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:48,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-20 02:00:48,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114222406] [2020-07-20 02:00:48,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 02:00:48,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:48,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 02:00:48,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-07-20 02:00:48,721 INFO L87 Difference]: Start difference. First operand 276 states and 305 transitions. Second operand 14 states. [2020-07-20 02:00:49,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:49,308 INFO L93 Difference]: Finished difference Result 296 states and 327 transitions. [2020-07-20 02:00:49,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 02:00:49,311 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 93 [2020-07-20 02:00:49,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:49,312 INFO L225 Difference]: With dead ends: 296 [2020-07-20 02:00:49,313 INFO L226 Difference]: Without dead ends: 294 [2020-07-20 02:00:49,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-07-20 02:00:49,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-07-20 02:00:49,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 292. [2020-07-20 02:00:49,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-07-20 02:00:49,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 323 transitions. [2020-07-20 02:00:49,337 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 323 transitions. Word has length 93 [2020-07-20 02:00:49,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:49,337 INFO L479 AbstractCegarLoop]: Abstraction has 292 states and 323 transitions. [2020-07-20 02:00:49,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 02:00:49,337 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 323 transitions. [2020-07-20 02:00:49,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-20 02:00:49,340 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:49,340 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:49,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:49,554 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:49,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:49,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1158356443, now seen corresponding path program 18 times [2020-07-20 02:00:49,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:49,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838744752] [2020-07-20 02:00:49,555 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:49,569 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:49,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657929505] [2020-07-20 02:00:49,570 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f3bb2c 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 02:00:49,619 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f3bb2c issued 1 check-sat command(s) [2020-07-20 02:00:49,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:49,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 02:00:49,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 76 proven. 104 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-07-20 02:00:49,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838744752] [2020-07-20 02:00:49,775 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:49,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657929505] [2020-07-20 02:00:49,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:49,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-20 02:00:49,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464639842] [2020-07-20 02:00:49,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 02:00:49,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:49,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 02:00:49,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-20 02:00:49,780 INFO L87 Difference]: Start difference. First operand 292 states and 323 transitions. Second operand 11 states. [2020-07-20 02:00:50,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:50,009 INFO L93 Difference]: Finished difference Result 348 states and 393 transitions. [2020-07-20 02:00:50,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 02:00:50,012 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 93 [2020-07-20 02:00:50,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:50,014 INFO L225 Difference]: With dead ends: 348 [2020-07-20 02:00:50,015 INFO L226 Difference]: Without dead ends: 318 [2020-07-20 02:00:50,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-07-20 02:00:50,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-07-20 02:00:50,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 316. [2020-07-20 02:00:50,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-07-20 02:00:50,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 354 transitions. [2020-07-20 02:00:50,051 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 354 transitions. Word has length 93 [2020-07-20 02:00:50,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:50,051 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 354 transitions. [2020-07-20 02:00:50,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 02:00:50,051 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 354 transitions. [2020-07-20 02:00:50,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-20 02:00:50,053 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:50,053 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:50,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-07-20 02:00:50,267 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:50,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:50,267 INFO L82 PathProgramCache]: Analyzing trace with hash -178978853, now seen corresponding path program 19 times [2020-07-20 02:00:50,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:50,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106359311] [2020-07-20 02:00:50,268 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:50,274 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:50,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435084618] [2020-07-20 02:00:50,275 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@54f2a495 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:50,307 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@54f2a495 issued 1 check-sat command(s) [2020-07-20 02:00:50,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:50,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 02:00:50,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 76 proven. 104 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-07-20 02:00:50,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106359311] [2020-07-20 02:00:50,391 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:50,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435084618] [2020-07-20 02:00:50,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:50,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-20 02:00:50,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044694850] [2020-07-20 02:00:50,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 02:00:50,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:50,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 02:00:50,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-20 02:00:50,392 INFO L87 Difference]: Start difference. First operand 316 states and 354 transitions. Second operand 11 states. [2020-07-20 02:00:50,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:50,657 INFO L93 Difference]: Finished difference Result 344 states and 384 transitions. [2020-07-20 02:00:50,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 02:00:50,659 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 93 [2020-07-20 02:00:50,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:50,662 INFO L225 Difference]: With dead ends: 344 [2020-07-20 02:00:50,663 INFO L226 Difference]: Without dead ends: 318 [2020-07-20 02:00:50,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-07-20 02:00:50,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-07-20 02:00:50,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 316. [2020-07-20 02:00:50,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-07-20 02:00:50,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 353 transitions. [2020-07-20 02:00:50,682 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 353 transitions. Word has length 93 [2020-07-20 02:00:50,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:50,683 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 353 transitions. [2020-07-20 02:00:50,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 02:00:50,683 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 353 transitions. [2020-07-20 02:00:50,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-20 02:00:50,684 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:50,685 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:50,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:50,898 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:50,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:50,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1208338151, now seen corresponding path program 20 times [2020-07-20 02:00:50,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:50,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912668019] [2020-07-20 02:00:50,900 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:50,915 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:50,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541829244] [2020-07-20 02:00:50,916 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4d36bfaf 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 02:00:50,994 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4d36bfaf issued 4 check-sat command(s) [2020-07-20 02:00:50,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:50,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 49 conjunts are in the unsatisfiable core [2020-07-20 02:00:51,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:51,578 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 18 proven. 162 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-07-20 02:00:51,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912668019] [2020-07-20 02:00:51,579 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:51,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541829244] [2020-07-20 02:00:51,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:51,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-20 02:00:51,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930777476] [2020-07-20 02:00:51,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 02:00:51,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:51,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 02:00:51,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-07-20 02:00:51,581 INFO L87 Difference]: Start difference. First operand 316 states and 353 transitions. Second operand 14 states. [2020-07-20 02:00:52,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:52,289 INFO L93 Difference]: Finished difference Result 334 states and 372 transitions. [2020-07-20 02:00:52,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 02:00:52,290 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 93 [2020-07-20 02:00:52,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:52,292 INFO L225 Difference]: With dead ends: 334 [2020-07-20 02:00:52,292 INFO L226 Difference]: Without dead ends: 332 [2020-07-20 02:00:52,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-07-20 02:00:52,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-07-20 02:00:52,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 330. [2020-07-20 02:00:52,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-07-20 02:00:52,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 368 transitions. [2020-07-20 02:00:52,329 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 368 transitions. Word has length 93 [2020-07-20 02:00:52,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:52,329 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 368 transitions. [2020-07-20 02:00:52,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 02:00:52,330 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 368 transitions. [2020-07-20 02:00:52,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-07-20 02:00:52,331 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:52,331 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:52,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-07-20 02:00:52,545 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:52,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:52,546 INFO L82 PathProgramCache]: Analyzing trace with hash 953745934, now seen corresponding path program 10 times [2020-07-20 02:00:52,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:52,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173566819] [2020-07-20 02:00:52,547 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:52,551 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:52,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2083584226] [2020-07-20 02:00:52,552 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f62541f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:52,616 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f62541f issued 4 check-sat command(s) [2020-07-20 02:00:52,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:52,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 53 conjunts are in the unsatisfiable core [2020-07-20 02:00:52,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:53,167 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-07-20 02:00:53,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173566819] [2020-07-20 02:00:53,168 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:53,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083584226] [2020-07-20 02:00:53,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:53,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-20 02:00:53,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752495335] [2020-07-20 02:00:53,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 02:00:53,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:53,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 02:00:53,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-07-20 02:00:53,170 INFO L87 Difference]: Start difference. First operand 330 states and 368 transitions. Second operand 15 states. [2020-07-20 02:00:53,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:53,850 INFO L93 Difference]: Finished difference Result 358 states and 399 transitions. [2020-07-20 02:00:53,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 02:00:53,851 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 101 [2020-07-20 02:00:53,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:53,853 INFO L225 Difference]: With dead ends: 358 [2020-07-20 02:00:53,853 INFO L226 Difference]: Without dead ends: 340 [2020-07-20 02:00:53,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-07-20 02:00:53,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-07-20 02:00:53,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 338. [2020-07-20 02:00:53,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-07-20 02:00:53,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 376 transitions. [2020-07-20 02:00:53,876 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 376 transitions. Word has length 101 [2020-07-20 02:00:53,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:53,877 INFO L479 AbstractCegarLoop]: Abstraction has 338 states and 376 transitions. [2020-07-20 02:00:53,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 02:00:53,877 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 376 transitions. [2020-07-20 02:00:53,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-07-20 02:00:53,879 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:53,879 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:54,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:54,093 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:54,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:54,094 INFO L82 PathProgramCache]: Analyzing trace with hash -883127740, now seen corresponding path program 21 times [2020-07-20 02:00:54,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:54,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356239050] [2020-07-20 02:00:54,095 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:54,111 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:54,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267381066] [2020-07-20 02:00:54,112 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@54b7beaf 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 02:00:54,172 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@54b7beaf issued 4 check-sat command(s) [2020-07-20 02:00:54,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:54,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 45 conjunts are in the unsatisfiable core [2020-07-20 02:00:54,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-07-20 02:00:54,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356239050] [2020-07-20 02:00:54,944 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:54,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267381066] [2020-07-20 02:00:54,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:54,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-20 02:00:54,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469448066] [2020-07-20 02:00:54,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 02:00:54,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:54,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 02:00:54,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-07-20 02:00:54,947 INFO L87 Difference]: Start difference. First operand 338 states and 376 transitions. Second operand 15 states. [2020-07-20 02:00:55,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:55,751 INFO L93 Difference]: Finished difference Result 368 states and 410 transitions. [2020-07-20 02:00:55,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 02:00:55,756 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 101 [2020-07-20 02:00:55,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:55,758 INFO L225 Difference]: With dead ends: 368 [2020-07-20 02:00:55,759 INFO L226 Difference]: Without dead ends: 350 [2020-07-20 02:00:55,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-07-20 02:00:55,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-07-20 02:00:55,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 350. [2020-07-20 02:00:55,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-07-20 02:00:55,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 389 transitions. [2020-07-20 02:00:55,782 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 389 transitions. Word has length 101 [2020-07-20 02:00:55,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:55,782 INFO L479 AbstractCegarLoop]: Abstraction has 350 states and 389 transitions. [2020-07-20 02:00:55,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 02:00:55,782 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 389 transitions. [2020-07-20 02:00:55,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-07-20 02:00:55,784 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:55,784 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:55,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-07-20 02:00:55,998 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:55,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:55,999 INFO L82 PathProgramCache]: Analyzing trace with hash -837428226, now seen corresponding path program 22 times [2020-07-20 02:00:55,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:55,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676403761] [2020-07-20 02:00:55,999 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:56,007 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:56,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227318976] [2020-07-20 02:00:56,007 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@26f30efe No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:56,062 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@26f30efe issued 4 check-sat command(s) [2020-07-20 02:00:56,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:56,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 45 conjunts are in the unsatisfiable core [2020-07-20 02:00:56,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-07-20 02:00:56,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676403761] [2020-07-20 02:00:56,724 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:56,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227318976] [2020-07-20 02:00:56,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:56,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-20 02:00:56,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849847750] [2020-07-20 02:00:56,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 02:00:56,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:56,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 02:00:56,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-07-20 02:00:56,727 INFO L87 Difference]: Start difference. First operand 350 states and 389 transitions. Second operand 15 states. [2020-07-20 02:00:57,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:57,541 INFO L93 Difference]: Finished difference Result 380 states and 425 transitions. [2020-07-20 02:00:57,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 02:00:57,545 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 101 [2020-07-20 02:00:57,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:57,548 INFO L225 Difference]: With dead ends: 380 [2020-07-20 02:00:57,548 INFO L226 Difference]: Without dead ends: 378 [2020-07-20 02:00:57,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-07-20 02:00:57,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-07-20 02:00:57,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 368. [2020-07-20 02:00:57,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2020-07-20 02:00:57,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 412 transitions. [2020-07-20 02:00:57,570 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 412 transitions. Word has length 101 [2020-07-20 02:00:57,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:57,571 INFO L479 AbstractCegarLoop]: Abstraction has 368 states and 412 transitions. [2020-07-20 02:00:57,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 02:00:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 412 transitions. [2020-07-20 02:00:57,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-07-20 02:00:57,572 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:57,573 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:57,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-07-20 02:00:57,786 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:57,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:57,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1090844476, now seen corresponding path program 23 times [2020-07-20 02:00:57,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:57,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545268284] [2020-07-20 02:00:57,787 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:57,794 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:57,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [127898862] [2020-07-20 02:00:57,795 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@748ceb12 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 02:00:57,847 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@748ceb12 issued 4 check-sat command(s) [2020-07-20 02:00:57,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:57,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 53 conjunts are in the unsatisfiable core [2020-07-20 02:00:57,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-07-20 02:00:58,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545268284] [2020-07-20 02:00:58,524 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:58,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127898862] [2020-07-20 02:00:58,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:58,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-20 02:00:58,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153932204] [2020-07-20 02:00:58,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 02:00:58,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:58,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 02:00:58,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-07-20 02:00:58,526 INFO L87 Difference]: Start difference. First operand 368 states and 412 transitions. Second operand 15 states. [2020-07-20 02:00:59,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:59,433 INFO L93 Difference]: Finished difference Result 388 states and 434 transitions. [2020-07-20 02:00:59,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 02:00:59,434 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 101 [2020-07-20 02:00:59,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:59,436 INFO L225 Difference]: With dead ends: 388 [2020-07-20 02:00:59,436 INFO L226 Difference]: Without dead ends: 386 [2020-07-20 02:00:59,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-07-20 02:00:59,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-07-20 02:00:59,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 376. [2020-07-20 02:00:59,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-07-20 02:00:59,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 421 transitions. [2020-07-20 02:00:59,458 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 421 transitions. Word has length 101 [2020-07-20 02:00:59,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:59,459 INFO L479 AbstractCegarLoop]: Abstraction has 376 states and 421 transitions. [2020-07-20 02:00:59,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 02:00:59,459 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 421 transitions. [2020-07-20 02:00:59,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-20 02:00:59,461 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:59,461 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:59,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-07-20 02:00:59,675 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:59,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:59,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1671534605, now seen corresponding path program 11 times [2020-07-20 02:00:59,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:59,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949461983] [2020-07-20 02:00:59,677 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:00:59,683 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:59,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331392135] [2020-07-20 02:00:59,683 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66dbbab9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:59,752 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66dbbab9 issued 4 check-sat command(s) [2020-07-20 02:00:59,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:59,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-20 02:00:59,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 22 proven. 242 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-07-20 02:01:00,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949461983] [2020-07-20 02:01:00,531 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:00,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331392135] [2020-07-20 02:01:00,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:00,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-07-20 02:01:00,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323023310] [2020-07-20 02:01:00,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 02:01:00,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:00,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 02:01:00,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-07-20 02:01:00,533 INFO L87 Difference]: Start difference. First operand 376 states and 421 transitions. Second operand 16 states. [2020-07-20 02:01:01,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:01,430 INFO L93 Difference]: Finished difference Result 404 states and 452 transitions. [2020-07-20 02:01:01,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 02:01:01,430 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 109 [2020-07-20 02:01:01,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:01,432 INFO L225 Difference]: With dead ends: 404 [2020-07-20 02:01:01,432 INFO L226 Difference]: Without dead ends: 386 [2020-07-20 02:01:01,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-07-20 02:01:01,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-07-20 02:01:01,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 384. [2020-07-20 02:01:01,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-07-20 02:01:01,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 429 transitions. [2020-07-20 02:01:01,461 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 429 transitions. Word has length 109 [2020-07-20 02:01:01,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:01,461 INFO L479 AbstractCegarLoop]: Abstraction has 384 states and 429 transitions. [2020-07-20 02:01:01,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 02:01:01,461 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 429 transitions. [2020-07-20 02:01:01,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-20 02:01:01,463 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:01,463 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:01,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-07-20 02:01:01,677 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:01,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:01,678 INFO L82 PathProgramCache]: Analyzing trace with hash -74062559, now seen corresponding path program 24 times [2020-07-20 02:01:01,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:01,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529824767] [2020-07-20 02:01:01,679 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:01:01,685 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:01,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883436019] [2020-07-20 02:01:01,686 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@25588de3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:01,746 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@25588de3 issued 1 check-sat command(s) [2020-07-20 02:01:01,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:01,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 02:01:01,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 104 proven. 160 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-07-20 02:01:01,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529824767] [2020-07-20 02:01:01,879 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:01,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883436019] [2020-07-20 02:01:01,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:01,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-20 02:01:01,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529567431] [2020-07-20 02:01:01,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 02:01:01,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:01,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 02:01:01,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-07-20 02:01:01,881 INFO L87 Difference]: Start difference. First operand 384 states and 429 transitions. Second operand 13 states. [2020-07-20 02:01:02,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:02,195 INFO L93 Difference]: Finished difference Result 448 states and 509 transitions. [2020-07-20 02:01:02,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 02:01:02,201 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 109 [2020-07-20 02:01:02,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:02,204 INFO L225 Difference]: With dead ends: 448 [2020-07-20 02:01:02,205 INFO L226 Difference]: Without dead ends: 414 [2020-07-20 02:01:02,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2020-07-20 02:01:02,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-07-20 02:01:02,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 412. [2020-07-20 02:01:02,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-07-20 02:01:02,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 465 transitions. [2020-07-20 02:01:02,230 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 465 transitions. Word has length 109 [2020-07-20 02:01:02,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:02,231 INFO L479 AbstractCegarLoop]: Abstraction has 412 states and 465 transitions. [2020-07-20 02:01:02,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 02:01:02,231 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 465 transitions. [2020-07-20 02:01:02,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-20 02:01:02,233 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:02,233 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:02,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:02,448 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:02,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:02,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1126316255, now seen corresponding path program 25 times [2020-07-20 02:01:02,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:02,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259121112] [2020-07-20 02:01:02,449 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:01:02,456 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:02,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747001835] [2020-07-20 02:01:02,457 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@794b3a0b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:02,493 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@794b3a0b issued 1 check-sat command(s) [2020-07-20 02:01:02,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:02,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 02:01:02,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:02,647 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 104 proven. 160 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-07-20 02:01:02,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259121112] [2020-07-20 02:01:02,648 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:02,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747001835] [2020-07-20 02:01:02,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:02,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-20 02:01:02,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414430032] [2020-07-20 02:01:02,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 02:01:02,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:02,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 02:01:02,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-07-20 02:01:02,650 INFO L87 Difference]: Start difference. First operand 412 states and 465 transitions. Second operand 13 states. [2020-07-20 02:01:03,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:03,088 INFO L93 Difference]: Finished difference Result 444 states and 500 transitions. [2020-07-20 02:01:03,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 02:01:03,091 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 109 [2020-07-20 02:01:03,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:03,095 INFO L225 Difference]: With dead ends: 444 [2020-07-20 02:01:03,095 INFO L226 Difference]: Without dead ends: 414 [2020-07-20 02:01:03,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2020-07-20 02:01:03,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-07-20 02:01:03,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 412. [2020-07-20 02:01:03,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-07-20 02:01:03,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 464 transitions. [2020-07-20 02:01:03,130 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 464 transitions. Word has length 109 [2020-07-20 02:01:03,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:03,131 INFO L479 AbstractCegarLoop]: Abstraction has 412 states and 464 transitions. [2020-07-20 02:01:03,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 02:01:03,131 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 464 transitions. [2020-07-20 02:01:03,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-20 02:01:03,133 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:03,134 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:03,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-07-20 02:01:03,348 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:03,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:03,349 INFO L82 PathProgramCache]: Analyzing trace with hash 801956447, now seen corresponding path program 26 times [2020-07-20 02:01:03,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:03,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63298277] [2020-07-20 02:01:03,350 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:01:03,368 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:03,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1447186102] [2020-07-20 02:01:03,371 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13e225e5 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:03,431 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13e225e5 issued 4 check-sat command(s) [2020-07-20 02:01:03,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:03,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-20 02:01:03,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 22 proven. 242 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-07-20 02:01:04,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63298277] [2020-07-20 02:01:04,498 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:04,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447186102] [2020-07-20 02:01:04,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:04,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-07-20 02:01:04,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109009549] [2020-07-20 02:01:04,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 02:01:04,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:04,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 02:01:04,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-07-20 02:01:04,515 INFO L87 Difference]: Start difference. First operand 412 states and 464 transitions. Second operand 16 states. [2020-07-20 02:01:05,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:05,994 INFO L93 Difference]: Finished difference Result 430 states and 483 transitions. [2020-07-20 02:01:05,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 02:01:05,995 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 109 [2020-07-20 02:01:05,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:05,999 INFO L225 Difference]: With dead ends: 430 [2020-07-20 02:01:05,999 INFO L226 Difference]: Without dead ends: 428 [2020-07-20 02:01:06,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-07-20 02:01:06,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2020-07-20 02:01:06,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 426. [2020-07-20 02:01:06,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2020-07-20 02:01:06,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 479 transitions. [2020-07-20 02:01:06,040 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 479 transitions. Word has length 109 [2020-07-20 02:01:06,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:06,043 INFO L479 AbstractCegarLoop]: Abstraction has 426 states and 479 transitions. [2020-07-20 02:01:06,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 02:01:06,043 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 479 transitions. [2020-07-20 02:01:06,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-20 02:01:06,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:06,046 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:06,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:06,260 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:06,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:06,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1273370840, now seen corresponding path program 12 times [2020-07-20 02:01:06,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:06,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272271598] [2020-07-20 02:01:06,261 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:01:06,269 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:06,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1862906971] [2020-07-20 02:01:06,270 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@643ceaa0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:06,347 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@643ceaa0 issued 4 check-sat command(s) [2020-07-20 02:01:06,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:06,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 61 conjunts are in the unsatisfiable core [2020-07-20 02:01:06,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 24 proven. 288 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2020-07-20 02:01:07,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272271598] [2020-07-20 02:01:07,483 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:07,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862906971] [2020-07-20 02:01:07,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:07,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-20 02:01:07,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564649791] [2020-07-20 02:01:07,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 02:01:07,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:07,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 02:01:07,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-07-20 02:01:07,486 INFO L87 Difference]: Start difference. First operand 426 states and 479 transitions. Second operand 17 states. [2020-07-20 02:01:08,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:08,694 INFO L93 Difference]: Finished difference Result 454 states and 510 transitions. [2020-07-20 02:01:08,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 02:01:08,694 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 117 [2020-07-20 02:01:08,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:08,697 INFO L225 Difference]: With dead ends: 454 [2020-07-20 02:01:08,698 INFO L226 Difference]: Without dead ends: 436 [2020-07-20 02:01:08,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-07-20 02:01:08,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-07-20 02:01:08,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 434. [2020-07-20 02:01:08,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2020-07-20 02:01:08,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 487 transitions. [2020-07-20 02:01:08,745 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 487 transitions. Word has length 117 [2020-07-20 02:01:08,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:08,746 INFO L479 AbstractCegarLoop]: Abstraction has 434 states and 487 transitions. [2020-07-20 02:01:08,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 02:01:08,746 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 487 transitions. [2020-07-20 02:01:08,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-20 02:01:08,749 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:08,750 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:08,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:08,964 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:08,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:08,965 INFO L82 PathProgramCache]: Analyzing trace with hash 2112489548, now seen corresponding path program 27 times [2020-07-20 02:01:08,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:08,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633789911] [2020-07-20 02:01:08,966 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:01:08,975 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:08,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [758760108] [2020-07-20 02:01:08,976 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3acb27ec No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:09,068 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3acb27ec issued 4 check-sat command(s) [2020-07-20 02:01:09,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:09,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-20 02:01:09,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:10,779 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 24 proven. 288 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2020-07-20 02:01:10,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633789911] [2020-07-20 02:01:10,780 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:10,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758760108] [2020-07-20 02:01:10,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:10,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-20 02:01:10,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115222782] [2020-07-20 02:01:10,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 02:01:10,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:10,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 02:01:10,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-07-20 02:01:10,783 INFO L87 Difference]: Start difference. First operand 434 states and 487 transitions. Second operand 17 states. [2020-07-20 02:01:12,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:12,135 INFO L93 Difference]: Finished difference Result 464 states and 521 transitions. [2020-07-20 02:01:12,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 02:01:12,139 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 117 [2020-07-20 02:01:12,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:12,141 INFO L225 Difference]: With dead ends: 464 [2020-07-20 02:01:12,141 INFO L226 Difference]: Without dead ends: 446 [2020-07-20 02:01:12,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-07-20 02:01:12,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-07-20 02:01:12,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 446. [2020-07-20 02:01:12,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 446 states. [2020-07-20 02:01:12,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 500 transitions. [2020-07-20 02:01:12,163 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 500 transitions. Word has length 117 [2020-07-20 02:01:12,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:12,164 INFO L479 AbstractCegarLoop]: Abstraction has 446 states and 500 transitions. [2020-07-20 02:01:12,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 02:01:12,164 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 500 transitions. [2020-07-20 02:01:12,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-20 02:01:12,166 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:12,166 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 8, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:12,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-07-20 02:01:12,380 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:12,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:12,380 INFO L82 PathProgramCache]: Analyzing trace with hash 390202056, now seen corresponding path program 28 times [2020-07-20 02:01:12,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:12,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384430052] [2020-07-20 02:01:12,381 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:01:12,384 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:12,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57888257] [2020-07-20 02:01:12,385 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13ad624b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:12,450 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13ad624b issued 4 check-sat command(s) [2020-07-20 02:01:12,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:12,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 49 conjunts are in the unsatisfiable core [2020-07-20 02:01:12,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 24 proven. 288 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2020-07-20 02:01:13,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384430052] [2020-07-20 02:01:13,880 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:13,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57888257] [2020-07-20 02:01:13,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:13,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-20 02:01:13,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692239104] [2020-07-20 02:01:13,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 02:01:13,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:13,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 02:01:13,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-07-20 02:01:13,881 INFO L87 Difference]: Start difference. First operand 446 states and 500 transitions. Second operand 17 states. [2020-07-20 02:01:15,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:15,162 INFO L93 Difference]: Finished difference Result 466 states and 522 transitions. [2020-07-20 02:01:15,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 02:01:15,168 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 117 [2020-07-20 02:01:15,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:15,171 INFO L225 Difference]: With dead ends: 466 [2020-07-20 02:01:15,171 INFO L226 Difference]: Without dead ends: 464 [2020-07-20 02:01:15,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-07-20 02:01:15,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2020-07-20 02:01:15,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 462. [2020-07-20 02:01:15,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2020-07-20 02:01:15,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 518 transitions. [2020-07-20 02:01:15,200 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 518 transitions. Word has length 117 [2020-07-20 02:01:15,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:15,201 INFO L479 AbstractCegarLoop]: Abstraction has 462 states and 518 transitions. [2020-07-20 02:01:15,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 02:01:15,201 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 518 transitions. [2020-07-20 02:01:15,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-20 02:01:15,204 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:15,204 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 9, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:15,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-07-20 02:01:15,418 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:15,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:15,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1248788486, now seen corresponding path program 29 times [2020-07-20 02:01:15,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:15,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869412106] [2020-07-20 02:01:15,420 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:01:15,426 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:15,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079108665] [2020-07-20 02:01:15,426 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2df772be No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:15,500 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2df772be issued 4 check-sat command(s) [2020-07-20 02:01:15,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:15,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 49 conjunts are in the unsatisfiable core [2020-07-20 02:01:15,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 24 proven. 288 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2020-07-20 02:01:17,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869412106] [2020-07-20 02:01:17,204 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:17,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079108665] [2020-07-20 02:01:17,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:17,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-20 02:01:17,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091649322] [2020-07-20 02:01:17,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 02:01:17,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:17,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 02:01:17,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-07-20 02:01:17,206 INFO L87 Difference]: Start difference. First operand 462 states and 518 transitions. Second operand 17 states. [2020-07-20 02:01:18,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:18,898 INFO L93 Difference]: Finished difference Result 486 states and 545 transitions. [2020-07-20 02:01:18,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 02:01:18,905 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 117 [2020-07-20 02:01:18,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:18,908 INFO L225 Difference]: With dead ends: 486 [2020-07-20 02:01:18,908 INFO L226 Difference]: Without dead ends: 484 [2020-07-20 02:01:18,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-07-20 02:01:18,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-07-20 02:01:18,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 482. [2020-07-20 02:01:18,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2020-07-20 02:01:18,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 541 transitions. [2020-07-20 02:01:18,953 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 541 transitions. Word has length 117 [2020-07-20 02:01:18,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:18,953 INFO L479 AbstractCegarLoop]: Abstraction has 482 states and 541 transitions. [2020-07-20 02:01:18,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 02:01:18,954 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 541 transitions. [2020-07-20 02:01:18,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-20 02:01:18,956 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:18,956 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:19,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-07-20 02:01:19,170 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:19,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:19,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1251867972, now seen corresponding path program 30 times [2020-07-20 02:01:19,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:19,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631269405] [2020-07-20 02:01:19,171 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:01:19,175 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:19,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [687396070] [2020-07-20 02:01:19,175 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58059cc3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:19,232 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58059cc3 issued 4 check-sat command(s) [2020-07-20 02:01:19,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:19,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-20 02:01:19,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 24 proven. 288 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2020-07-20 02:01:20,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631269405] [2020-07-20 02:01:20,957 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:20,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687396070] [2020-07-20 02:01:20,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:20,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-20 02:01:20,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251182386] [2020-07-20 02:01:20,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 02:01:20,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:20,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 02:01:20,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-07-20 02:01:20,959 INFO L87 Difference]: Start difference. First operand 482 states and 541 transitions. Second operand 17 states. [2020-07-20 02:01:22,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:22,722 INFO L93 Difference]: Finished difference Result 514 states and 579 transitions. [2020-07-20 02:01:22,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 02:01:22,730 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 117 [2020-07-20 02:01:22,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:22,733 INFO L225 Difference]: With dead ends: 514 [2020-07-20 02:01:22,733 INFO L226 Difference]: Without dead ends: 512 [2020-07-20 02:01:22,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-07-20 02:01:22,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2020-07-20 02:01:22,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 502. [2020-07-20 02:01:22,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 502 states. [2020-07-20 02:01:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 566 transitions. [2020-07-20 02:01:22,763 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 566 transitions. Word has length 117 [2020-07-20 02:01:22,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:22,764 INFO L479 AbstractCegarLoop]: Abstraction has 502 states and 566 transitions. [2020-07-20 02:01:22,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 02:01:22,764 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 566 transitions. [2020-07-20 02:01:22,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-20 02:01:22,766 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:22,767 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:22,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:22,982 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:22,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:22,983 INFO L82 PathProgramCache]: Analyzing trace with hash 2127886978, now seen corresponding path program 31 times [2020-07-20 02:01:22,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:22,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622788480] [2020-07-20 02:01:22,983 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:01:22,991 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:22,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [927994228] [2020-07-20 02:01:22,991 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b88d6bc No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:23,045 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b88d6bc issued 4 check-sat command(s) [2020-07-20 02:01:23,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:23,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 61 conjunts are in the unsatisfiable core [2020-07-20 02:01:23,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:24,934 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 24 proven. 288 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2020-07-20 02:01:24,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622788480] [2020-07-20 02:01:24,934 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:24,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927994228] [2020-07-20 02:01:24,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:24,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-20 02:01:24,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137869215] [2020-07-20 02:01:24,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 02:01:24,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:24,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 02:01:24,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-07-20 02:01:24,936 INFO L87 Difference]: Start difference. First operand 502 states and 566 transitions. Second operand 17 states. [2020-07-20 02:01:26,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:26,936 INFO L93 Difference]: Finished difference Result 522 states and 588 transitions. [2020-07-20 02:01:26,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 02:01:26,936 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 117 [2020-07-20 02:01:26,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:26,939 INFO L225 Difference]: With dead ends: 522 [2020-07-20 02:01:26,940 INFO L226 Difference]: Without dead ends: 520 [2020-07-20 02:01:26,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-07-20 02:01:26,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2020-07-20 02:01:26,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 510. [2020-07-20 02:01:26,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 510 states. [2020-07-20 02:01:26,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 575 transitions. [2020-07-20 02:01:26,970 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 575 transitions. Word has length 117 [2020-07-20 02:01:26,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:26,970 INFO L479 AbstractCegarLoop]: Abstraction has 510 states and 575 transitions. [2020-07-20 02:01:26,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 02:01:26,971 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 575 transitions. [2020-07-20 02:01:26,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-07-20 02:01:26,973 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:26,973 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:27,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-07-20 02:01:27,186 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:27,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:27,187 INFO L82 PathProgramCache]: Analyzing trace with hash 838145213, now seen corresponding path program 13 times [2020-07-20 02:01:27,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:27,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376797477] [2020-07-20 02:01:27,188 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:01:27,193 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:27,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832002972] [2020-07-20 02:01:27,193 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1609a2c6 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:27,259 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1609a2c6 issued 4 check-sat command(s) [2020-07-20 02:01:27,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:27,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 65 conjunts are in the unsatisfiable core [2020-07-20 02:01:27,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 26 proven. 338 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2020-07-20 02:01:29,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376797477] [2020-07-20 02:01:29,781 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:29,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832002972] [2020-07-20 02:01:29,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:29,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-20 02:01:29,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631316710] [2020-07-20 02:01:29,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 02:01:29,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:29,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 02:01:29,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-07-20 02:01:29,787 INFO L87 Difference]: Start difference. First operand 510 states and 575 transitions. Second operand 18 states. [2020-07-20 02:01:32,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:32,546 INFO L93 Difference]: Finished difference Result 538 states and 606 transitions. [2020-07-20 02:01:32,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 02:01:32,547 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 125 [2020-07-20 02:01:32,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:32,551 INFO L225 Difference]: With dead ends: 538 [2020-07-20 02:01:32,551 INFO L226 Difference]: Without dead ends: 520 [2020-07-20 02:01:32,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-07-20 02:01:32,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2020-07-20 02:01:32,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 518. [2020-07-20 02:01:32,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 518 states. [2020-07-20 02:01:32,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 583 transitions. [2020-07-20 02:01:32,589 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 583 transitions. Word has length 125 [2020-07-20 02:01:32,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:32,589 INFO L479 AbstractCegarLoop]: Abstraction has 518 states and 583 transitions. [2020-07-20 02:01:32,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 02:01:32,590 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 583 transitions. [2020-07-20 02:01:32,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-07-20 02:01:32,593 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:32,593 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:32,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-07-20 02:01:32,807 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:32,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:32,808 INFO L82 PathProgramCache]: Analyzing trace with hash -853319577, now seen corresponding path program 32 times [2020-07-20 02:01:32,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:32,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084213502] [2020-07-20 02:01:32,809 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:01:32,814 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:32,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848081692] [2020-07-20 02:01:32,815 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a1c4f43 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:32,852 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a1c4f43 issued 1 check-sat command(s) [2020-07-20 02:01:32,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:32,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 02:01:32,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 136 proven. 228 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2020-07-20 02:01:33,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084213502] [2020-07-20 02:01:33,023 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:33,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848081692] [2020-07-20 02:01:33,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:33,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-20 02:01:33,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689703343] [2020-07-20 02:01:33,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 02:01:33,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:33,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 02:01:33,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-07-20 02:01:33,024 INFO L87 Difference]: Start difference. First operand 518 states and 583 transitions. Second operand 15 states. [2020-07-20 02:01:33,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:33,413 INFO L93 Difference]: Finished difference Result 590 states and 673 transitions. [2020-07-20 02:01:33,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 02:01:33,417 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 125 [2020-07-20 02:01:33,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:33,420 INFO L225 Difference]: With dead ends: 590 [2020-07-20 02:01:33,421 INFO L226 Difference]: Without dead ends: 552 [2020-07-20 02:01:33,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2020-07-20 02:01:33,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2020-07-20 02:01:33,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 550. [2020-07-20 02:01:33,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 550 states. [2020-07-20 02:01:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 624 transitions. [2020-07-20 02:01:33,452 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 624 transitions. Word has length 125 [2020-07-20 02:01:33,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:33,452 INFO L479 AbstractCegarLoop]: Abstraction has 550 states and 624 transitions. [2020-07-20 02:01:33,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 02:01:33,453 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 624 transitions. [2020-07-20 02:01:33,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-07-20 02:01:33,455 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:33,455 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:33,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:33,670 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:33,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:33,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1050066329, now seen corresponding path program 33 times [2020-07-20 02:01:33,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:33,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354456369] [2020-07-20 02:01:33,671 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:01:33,676 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:33,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515990150] [2020-07-20 02:01:33,677 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7eda0ba5 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:33,718 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7eda0ba5 issued 1 check-sat command(s) [2020-07-20 02:01:33,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:33,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 02:01:33,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:33,869 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 136 proven. 228 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2020-07-20 02:01:33,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354456369] [2020-07-20 02:01:33,870 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:33,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515990150] [2020-07-20 02:01:33,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:33,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-20 02:01:33,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967638005] [2020-07-20 02:01:33,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 02:01:33,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:33,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 02:01:33,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-07-20 02:01:33,871 INFO L87 Difference]: Start difference. First operand 550 states and 624 transitions. Second operand 15 states. [2020-07-20 02:01:34,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:34,234 INFO L93 Difference]: Finished difference Result 586 states and 664 transitions. [2020-07-20 02:01:34,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 02:01:34,238 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 125 [2020-07-20 02:01:34,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:34,242 INFO L225 Difference]: With dead ends: 586 [2020-07-20 02:01:34,242 INFO L226 Difference]: Without dead ends: 552 [2020-07-20 02:01:34,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2020-07-20 02:01:34,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2020-07-20 02:01:34,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 550. [2020-07-20 02:01:34,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 550 states. [2020-07-20 02:01:34,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 623 transitions. [2020-07-20 02:01:34,274 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 623 transitions. Word has length 125 [2020-07-20 02:01:34,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:34,275 INFO L479 AbstractCegarLoop]: Abstraction has 550 states and 623 transitions. [2020-07-20 02:01:34,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 02:01:34,275 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 623 transitions. [2020-07-20 02:01:34,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-07-20 02:01:34,277 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:34,278 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:34,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-07-20 02:01:34,493 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:34,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:34,493 INFO L82 PathProgramCache]: Analyzing trace with hash -174047323, now seen corresponding path program 34 times [2020-07-20 02:01:34,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:34,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780701392] [2020-07-20 02:01:34,494 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:01:34,500 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:34,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490405080] [2020-07-20 02:01:34,501 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@51a8e96e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:34,561 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@51a8e96e issued 4 check-sat command(s) [2020-07-20 02:01:34,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:34,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 65 conjunts are in the unsatisfiable core [2020-07-20 02:01:34,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:34,861 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:01:35,049 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:01:35,262 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:01:35,501 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:01:35,745 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:01:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 26 proven. 338 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2020-07-20 02:01:37,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780701392] [2020-07-20 02:01:37,118 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:37,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490405080] [2020-07-20 02:01:37,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:37,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-20 02:01:37,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535902009] [2020-07-20 02:01:37,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 02:01:37,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:37,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 02:01:37,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-07-20 02:01:37,120 INFO L87 Difference]: Start difference. First operand 550 states and 623 transitions. Second operand 18 states. [2020-07-20 02:01:39,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:39,163 INFO L93 Difference]: Finished difference Result 568 states and 642 transitions. [2020-07-20 02:01:39,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 02:01:39,163 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 125 [2020-07-20 02:01:39,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:39,167 INFO L225 Difference]: With dead ends: 568 [2020-07-20 02:01:39,167 INFO L226 Difference]: Without dead ends: 566 [2020-07-20 02:01:39,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-07-20 02:01:39,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2020-07-20 02:01:39,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 564. [2020-07-20 02:01:39,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 564 states. [2020-07-20 02:01:39,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 638 transitions. [2020-07-20 02:01:39,191 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 638 transitions. Word has length 125 [2020-07-20 02:01:39,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:39,191 INFO L479 AbstractCegarLoop]: Abstraction has 564 states and 638 transitions. [2020-07-20 02:01:39,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 02:01:39,191 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 638 transitions. [2020-07-20 02:01:39,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-07-20 02:01:39,194 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:39,194 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:39,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:39,395 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:39,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:39,396 INFO L82 PathProgramCache]: Analyzing trace with hash -468690014, now seen corresponding path program 14 times [2020-07-20 02:01:39,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:39,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895927246] [2020-07-20 02:01:39,396 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:01:39,402 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:39,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681661169] [2020-07-20 02:01:39,403 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4402b154 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:39,486 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4402b154 issued 4 check-sat command(s) [2020-07-20 02:01:39,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:39,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 69 conjunts are in the unsatisfiable core [2020-07-20 02:01:39,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:42,146 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 28 proven. 392 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2020-07-20 02:01:42,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895927246] [2020-07-20 02:01:42,147 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:42,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681661169] [2020-07-20 02:01:42,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:42,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-07-20 02:01:42,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830126171] [2020-07-20 02:01:42,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 02:01:42,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:42,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 02:01:42,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-07-20 02:01:42,149 INFO L87 Difference]: Start difference. First operand 564 states and 638 transitions. Second operand 19 states. [2020-07-20 02:01:44,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:44,355 INFO L93 Difference]: Finished difference Result 592 states and 669 transitions. [2020-07-20 02:01:44,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 02:01:44,356 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 133 [2020-07-20 02:01:44,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:44,358 INFO L225 Difference]: With dead ends: 592 [2020-07-20 02:01:44,358 INFO L226 Difference]: Without dead ends: 574 [2020-07-20 02:01:44,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-07-20 02:01:44,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2020-07-20 02:01:44,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 572. [2020-07-20 02:01:44,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2020-07-20 02:01:44,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 646 transitions. [2020-07-20 02:01:44,387 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 646 transitions. Word has length 133 [2020-07-20 02:01:44,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:44,388 INFO L479 AbstractCegarLoop]: Abstraction has 572 states and 646 transitions. [2020-07-20 02:01:44,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 02:01:44,388 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 646 transitions. [2020-07-20 02:01:44,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-07-20 02:01:44,390 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:44,390 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:44,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-07-20 02:01:44,606 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:44,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:44,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1760922028, now seen corresponding path program 35 times [2020-07-20 02:01:44,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:44,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441106228] [2020-07-20 02:01:44,607 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:01:44,614 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:44,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807525766] [2020-07-20 02:01:44,615 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24eb8c3f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:44,690 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@24eb8c3f issued 4 check-sat command(s) [2020-07-20 02:01:44,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:44,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-20 02:01:44,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:48,200 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 28 proven. 392 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2020-07-20 02:01:48,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441106228] [2020-07-20 02:01:48,200 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:48,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807525766] [2020-07-20 02:01:48,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:48,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-07-20 02:01:48,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590926271] [2020-07-20 02:01:48,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 02:01:48,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:48,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 02:01:48,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-07-20 02:01:48,202 INFO L87 Difference]: Start difference. First operand 572 states and 646 transitions. Second operand 19 states. [2020-07-20 02:01:51,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:51,030 INFO L93 Difference]: Finished difference Result 602 states and 680 transitions. [2020-07-20 02:01:51,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 02:01:51,041 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 133 [2020-07-20 02:01:51,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:51,044 INFO L225 Difference]: With dead ends: 602 [2020-07-20 02:01:51,044 INFO L226 Difference]: Without dead ends: 584 [2020-07-20 02:01:51,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-07-20 02:01:51,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2020-07-20 02:01:51,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2020-07-20 02:01:51,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-07-20 02:01:51,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 659 transitions. [2020-07-20 02:01:51,067 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 659 transitions. Word has length 133 [2020-07-20 02:01:51,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:51,067 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 659 transitions. [2020-07-20 02:01:51,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 02:01:51,067 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 659 transitions. [2020-07-20 02:01:51,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-07-20 02:01:51,069 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:51,070 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:51,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-07-20 02:01:51,285 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:51,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:51,286 INFO L82 PathProgramCache]: Analyzing trace with hash 3461770, now seen corresponding path program 36 times [2020-07-20 02:01:51,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:51,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338841751] [2020-07-20 02:01:51,286 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:01:51,292 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:51,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101978389] [2020-07-20 02:01:51,292 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1c274fc4 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:51,351 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1c274fc4 issued 4 check-sat command(s) [2020-07-20 02:01:51,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:51,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-20 02:01:51,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:54,905 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 28 proven. 392 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2020-07-20 02:01:54,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338841751] [2020-07-20 02:01:54,905 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:54,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101978389] [2020-07-20 02:01:54,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:54,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-07-20 02:01:54,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104238367] [2020-07-20 02:01:54,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 02:01:54,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:54,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 02:01:54,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-07-20 02:01:54,907 INFO L87 Difference]: Start difference. First operand 584 states and 659 transitions. Second operand 19 states. [2020-07-20 02:01:58,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:58,142 INFO L93 Difference]: Finished difference Result 622 states and 705 transitions. [2020-07-20 02:01:58,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 02:01:58,152 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 133 [2020-07-20 02:01:58,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:58,155 INFO L225 Difference]: With dead ends: 622 [2020-07-20 02:01:58,155 INFO L226 Difference]: Without dead ends: 620 [2020-07-20 02:01:58,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-07-20 02:01:58,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2020-07-20 02:01:58,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 610. [2020-07-20 02:01:58,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 610 states. [2020-07-20 02:01:58,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 692 transitions. [2020-07-20 02:01:58,188 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 692 transitions. Word has length 133 [2020-07-20 02:01:58,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:58,188 INFO L479 AbstractCegarLoop]: Abstraction has 610 states and 692 transitions. [2020-07-20 02:01:58,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 02:01:58,188 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 692 transitions. [2020-07-20 02:01:58,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-07-20 02:01:58,190 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:58,203 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:58,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:58,418 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:58,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:58,419 INFO L82 PathProgramCache]: Analyzing trace with hash 682734024, now seen corresponding path program 37 times [2020-07-20 02:01:58,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:58,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530455893] [2020-07-20 02:01:58,420 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:01:58,425 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:58,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712709561] [2020-07-20 02:01:58,425 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7dd0aaef No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:58,487 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7dd0aaef issued 4 check-sat command(s) [2020-07-20 02:01:58,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:58,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 69 conjunts are in the unsatisfiable core [2020-07-20 02:01:58,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:02:02,039 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 28 proven. 392 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2020-07-20 02:02:02,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530455893] [2020-07-20 02:02:02,040 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:02:02,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712709561] [2020-07-20 02:02:02,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:02:02,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-07-20 02:02:02,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849856424] [2020-07-20 02:02:02,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 02:02:02,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:02:02,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 02:02:02,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-07-20 02:02:02,041 INFO L87 Difference]: Start difference. First operand 610 states and 692 transitions. Second operand 19 states. [2020-07-20 02:02:05,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:02:05,495 INFO L93 Difference]: Finished difference Result 630 states and 714 transitions. [2020-07-20 02:02:05,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 02:02:05,495 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 133 [2020-07-20 02:02:05,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:02:05,498 INFO L225 Difference]: With dead ends: 630 [2020-07-20 02:02:05,498 INFO L226 Difference]: Without dead ends: 628 [2020-07-20 02:02:05,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-07-20 02:02:05,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2020-07-20 02:02:05,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 618. [2020-07-20 02:02:05,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 618 states. [2020-07-20 02:02:05,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 701 transitions. [2020-07-20 02:02:05,518 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 701 transitions. Word has length 133 [2020-07-20 02:02:05,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:02:05,519 INFO L479 AbstractCegarLoop]: Abstraction has 618 states and 701 transitions. [2020-07-20 02:02:05,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 02:02:05,519 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 701 transitions. [2020-07-20 02:02:05,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-07-20 02:02:05,520 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:02:05,520 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:02:05,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-07-20 02:02:05,722 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:02:05,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:02:05,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1564676729, now seen corresponding path program 15 times [2020-07-20 02:02:05,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:02:05,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542011662] [2020-07-20 02:02:05,724 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:02:05,728 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:02:05,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515873440] [2020-07-20 02:02:05,729 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4b515ce9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:02:05,804 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4b515ce9 issued 4 check-sat command(s) [2020-07-20 02:02:05,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:02:05,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 73 conjunts are in the unsatisfiable core [2020-07-20 02:02:05,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:02:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 30 proven. 450 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2020-07-20 02:02:09,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542011662] [2020-07-20 02:02:09,808 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:02:09,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515873440] [2020-07-20 02:02:09,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:02:09,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-07-20 02:02:09,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108920585] [2020-07-20 02:02:09,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 02:02:09,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:02:09,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 02:02:09,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-07-20 02:02:09,809 INFO L87 Difference]: Start difference. First operand 618 states and 701 transitions. Second operand 20 states. [2020-07-20 02:02:13,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:02:13,594 INFO L93 Difference]: Finished difference Result 646 states and 732 transitions. [2020-07-20 02:02:13,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 02:02:13,599 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 141 [2020-07-20 02:02:13,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:02:13,603 INFO L225 Difference]: With dead ends: 646 [2020-07-20 02:02:13,603 INFO L226 Difference]: Without dead ends: 628 [2020-07-20 02:02:13,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-07-20 02:02:13,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2020-07-20 02:02:13,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 626. [2020-07-20 02:02:13,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2020-07-20 02:02:13,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 709 transitions. [2020-07-20 02:02:13,631 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 709 transitions. Word has length 141 [2020-07-20 02:02:13,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:02:13,631 INFO L479 AbstractCegarLoop]: Abstraction has 626 states and 709 transitions. [2020-07-20 02:02:13,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 02:02:13,631 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 709 transitions. [2020-07-20 02:02:13,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-07-20 02:02:13,633 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:02:13,633 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 10, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:02:13,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:02:13,834 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:02:13,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:02:13,834 INFO L82 PathProgramCache]: Analyzing trace with hash -2126704653, now seen corresponding path program 38 times [2020-07-20 02:02:13,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:02:13,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497370615] [2020-07-20 02:02:13,835 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:02:13,840 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:02:13,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [705474856] [2020-07-20 02:02:13,840 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@51d3d954 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:02:13,910 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@51d3d954 issued 4 check-sat command(s) [2020-07-20 02:02:13,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:02:13,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-20 02:02:13,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:02:14,164 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:14,553 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:02:15,088 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:02:15,411 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:02:15,755 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:02:17,256 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:02:17,804 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:02:18,383 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:02:19,024 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 02:02:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 30 proven. 450 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2020-07-20 02:02:19,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497370615] [2020-07-20 02:02:19,956 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:02:19,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705474856] [2020-07-20 02:02:19,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:02:19,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-07-20 02:02:19,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19765845] [2020-07-20 02:02:19,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 02:02:19,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:02:19,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 02:02:19,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-07-20 02:02:19,958 INFO L87 Difference]: Start difference. First operand 626 states and 709 transitions. Second operand 20 states. [2020-07-20 02:02:23,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:02:23,789 INFO L93 Difference]: Finished difference Result 646 states and 731 transitions. [2020-07-20 02:02:23,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 02:02:23,806 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 141 [2020-07-20 02:02:23,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:02:23,809 INFO L225 Difference]: With dead ends: 646 [2020-07-20 02:02:23,809 INFO L226 Difference]: Without dead ends: 644 [2020-07-20 02:02:23,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-07-20 02:02:23,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2020-07-20 02:02:23,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 642. [2020-07-20 02:02:23,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2020-07-20 02:02:23,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 727 transitions. [2020-07-20 02:02:23,831 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 727 transitions. Word has length 141 [2020-07-20 02:02:23,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:02:23,831 INFO L479 AbstractCegarLoop]: Abstraction has 642 states and 727 transitions. [2020-07-20 02:02:23,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 02:02:23,831 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 727 transitions. [2020-07-20 02:02:23,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-07-20 02:02:23,833 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:02:23,833 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:02:24,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-07-20 02:02:24,034 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:02:24,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:02:24,034 INFO L82 PathProgramCache]: Analyzing trace with hash 2069540975, now seen corresponding path program 39 times [2020-07-20 02:02:24,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:02:24,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405511050] [2020-07-20 02:02:24,035 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:02:24,040 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:02:24,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523991939] [2020-07-20 02:02:24,040 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@32ce4cc9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:02:24,106 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@32ce4cc9 issued 4 check-sat command(s) [2020-07-20 02:02:24,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:02:24,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-20 02:02:24,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:02:25,105 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:02:26,541 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:02:27,029 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:02:27,597 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:02:28,229 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:02:28,935 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:02:29,686 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 02:02:30,724 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 30 proven. 450 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2020-07-20 02:02:30,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405511050] [2020-07-20 02:02:30,724 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:02:30,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523991939] [2020-07-20 02:02:30,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:02:30,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-07-20 02:02:30,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725236843] [2020-07-20 02:02:30,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 02:02:30,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:02:30,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 02:02:30,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-07-20 02:02:30,726 INFO L87 Difference]: Start difference. First operand 642 states and 727 transitions. Second operand 20 states. [2020-07-20 02:02:35,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:02:35,550 INFO L93 Difference]: Finished difference Result 670 states and 759 transitions. [2020-07-20 02:02:35,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 02:02:35,562 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 141 [2020-07-20 02:02:35,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:02:35,565 INFO L225 Difference]: With dead ends: 670 [2020-07-20 02:02:35,565 INFO L226 Difference]: Without dead ends: 668 [2020-07-20 02:02:35,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-07-20 02:02:35,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2020-07-20 02:02:35,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 666. [2020-07-20 02:02:35,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 666 states. [2020-07-20 02:02:35,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 755 transitions. [2020-07-20 02:02:35,591 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 755 transitions. Word has length 141 [2020-07-20 02:02:35,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:02:35,592 INFO L479 AbstractCegarLoop]: Abstraction has 666 states and 755 transitions. [2020-07-20 02:02:35,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 02:02:35,592 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 755 transitions. [2020-07-20 02:02:35,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-07-20 02:02:35,593 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:02:35,594 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:02:35,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-07-20 02:02:35,796 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:02:35,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:02:35,797 INFO L82 PathProgramCache]: Analyzing trace with hash 130781101, now seen corresponding path program 40 times [2020-07-20 02:02:35,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:02:35,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104303696] [2020-07-20 02:02:35,798 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:02:35,805 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:02:35,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299390148] [2020-07-20 02:02:35,806 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@cce398a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:02:35,852 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@cce398a issued 1 check-sat command(s) [2020-07-20 02:02:35,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:02:35,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 02:02:35,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:02:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 172 proven. 308 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2020-07-20 02:02:36,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104303696] [2020-07-20 02:02:36,069 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:02:36,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299390148] [2020-07-20 02:02:36,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:02:36,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-20 02:02:36,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007021747] [2020-07-20 02:02:36,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 02:02:36,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:02:36,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 02:02:36,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-07-20 02:02:36,071 INFO L87 Difference]: Start difference. First operand 666 states and 755 transitions. Second operand 17 states. [2020-07-20 02:02:36,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:02:36,695 INFO L93 Difference]: Finished difference Result 746 states and 855 transitions. [2020-07-20 02:02:36,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 02:02:36,706 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 141 [2020-07-20 02:02:36,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:02:36,710 INFO L225 Difference]: With dead ends: 746 [2020-07-20 02:02:36,710 INFO L226 Difference]: Without dead ends: 704 [2020-07-20 02:02:36,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2020-07-20 02:02:36,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2020-07-20 02:02:36,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 702. [2020-07-20 02:02:36,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2020-07-20 02:02:36,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 801 transitions. [2020-07-20 02:02:36,761 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 801 transitions. Word has length 141 [2020-07-20 02:02:36,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:02:36,761 INFO L479 AbstractCegarLoop]: Abstraction has 702 states and 801 transitions. [2020-07-20 02:02:36,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 02:02:36,762 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 801 transitions. [2020-07-20 02:02:36,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-07-20 02:02:36,763 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:02:36,763 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:02:36,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:02:36,964 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:02:36,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:02:36,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1359966637, now seen corresponding path program 41 times [2020-07-20 02:02:36,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:02:36,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577177758] [2020-07-20 02:02:36,966 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:02:36,972 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:02:36,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1761163540] [2020-07-20 02:02:36,972 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52bb58f2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:02:37,015 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52bb58f2 issued 1 check-sat command(s) [2020-07-20 02:02:37,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:02:37,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 02:02:37,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:02:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 172 proven. 308 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2020-07-20 02:02:37,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577177758] [2020-07-20 02:02:37,216 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:02:37,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761163540] [2020-07-20 02:02:37,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:02:37,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-20 02:02:37,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721478431] [2020-07-20 02:02:37,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 02:02:37,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:02:37,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 02:02:37,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-07-20 02:02:37,217 INFO L87 Difference]: Start difference. First operand 702 states and 801 transitions. Second operand 17 states. [2020-07-20 02:02:37,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:02:37,785 INFO L93 Difference]: Finished difference Result 742 states and 846 transitions. [2020-07-20 02:02:37,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 02:02:37,791 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 141 [2020-07-20 02:02:37,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:02:37,795 INFO L225 Difference]: With dead ends: 742 [2020-07-20 02:02:37,795 INFO L226 Difference]: Without dead ends: 704 [2020-07-20 02:02:37,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2020-07-20 02:02:37,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2020-07-20 02:02:37,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 702. [2020-07-20 02:02:37,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2020-07-20 02:02:37,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 800 transitions. [2020-07-20 02:02:37,827 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 800 transitions. Word has length 141 [2020-07-20 02:02:37,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:02:37,827 INFO L479 AbstractCegarLoop]: Abstraction has 702 states and 800 transitions. [2020-07-20 02:02:37,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 02:02:37,828 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 800 transitions. [2020-07-20 02:02:37,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-07-20 02:02:37,829 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:02:37,829 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:02:38,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:02:38,030 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:02:38,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:02:38,031 INFO L82 PathProgramCache]: Analyzing trace with hash 2039238891, now seen corresponding path program 42 times [2020-07-20 02:02:38,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:02:38,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081760776] [2020-07-20 02:02:38,032 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:02:38,037 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:02:38,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561020805] [2020-07-20 02:02:38,037 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fb55288 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:02:38,100 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fb55288 issued 4 check-sat command(s) [2020-07-20 02:02:38,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:02:38,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 73 conjunts are in the unsatisfiable core [2020-07-20 02:02:38,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:02:38,372 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:38,595 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:38,829 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:39,108 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:39,389 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:39,686 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:39,995 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:40,324 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:40,696 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:41,099 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:41,523 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:41,990 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:42,476 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:42,967 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 02:02:43,687 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 30 proven. 450 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2020-07-20 02:02:43,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081760776] [2020-07-20 02:02:43,688 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:02:43,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561020805] [2020-07-20 02:02:43,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:02:43,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-07-20 02:02:43,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442994738] [2020-07-20 02:02:43,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 02:02:43,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:02:43,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 02:02:43,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-07-20 02:02:43,689 INFO L87 Difference]: Start difference. First operand 702 states and 800 transitions. Second operand 20 states. [2020-07-20 02:02:48,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:02:48,276 INFO L93 Difference]: Finished difference Result 720 states and 819 transitions. [2020-07-20 02:02:48,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 02:02:48,277 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 141 [2020-07-20 02:02:48,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:02:48,280 INFO L225 Difference]: With dead ends: 720 [2020-07-20 02:02:48,280 INFO L226 Difference]: Without dead ends: 718 [2020-07-20 02:02:48,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-07-20 02:02:48,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2020-07-20 02:02:48,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 716. [2020-07-20 02:02:48,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 716 states. [2020-07-20 02:02:48,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 815 transitions. [2020-07-20 02:02:48,310 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 815 transitions. Word has length 141 [2020-07-20 02:02:48,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:02:48,310 INFO L479 AbstractCegarLoop]: Abstraction has 716 states and 815 transitions. [2020-07-20 02:02:48,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 02:02:48,310 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 815 transitions. [2020-07-20 02:02:48,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-07-20 02:02:48,312 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:02:48,312 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:02:48,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:02:48,521 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:02:48,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:02:48,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1501547116, now seen corresponding path program 16 times [2020-07-20 02:02:48,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:02:48,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281766774] [2020-07-20 02:02:48,523 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:02:48,528 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:02:48,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431205113] [2020-07-20 02:02:48,529 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5d2c68c2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:02:48,609 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5d2c68c2 issued 4 check-sat command(s) [2020-07-20 02:02:48,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:02:48,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 77 conjunts are in the unsatisfiable core [2020-07-20 02:02:48,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:02:48,917 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:49,147 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:49,407 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:49,676 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:50,006 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:50,355 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:50,712 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:51,123 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:51,551 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:52,008 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:52,481 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:53,001 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:53,559 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:54,160 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:54,754 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 02:02:55,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 32 proven. 512 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-07-20 02:02:55,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281766774] [2020-07-20 02:02:55,639 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:02:55,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431205113] [2020-07-20 02:02:55,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:02:55,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-20 02:02:55,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750453490] [2020-07-20 02:02:55,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 02:02:55,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:02:55,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 02:02:55,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-07-20 02:02:55,646 INFO L87 Difference]: Start difference. First operand 716 states and 815 transitions. Second operand 21 states. [2020-07-20 02:03:00,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:03:00,936 INFO L93 Difference]: Finished difference Result 744 states and 846 transitions. [2020-07-20 02:03:00,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 02:03:00,937 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 149 [2020-07-20 02:03:00,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:03:00,946 INFO L225 Difference]: With dead ends: 744 [2020-07-20 02:03:00,946 INFO L226 Difference]: Without dead ends: 726 [2020-07-20 02:03:00,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-07-20 02:03:00,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2020-07-20 02:03:00,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 724. [2020-07-20 02:03:00,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 724 states. [2020-07-20 02:03:00,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 823 transitions. [2020-07-20 02:03:00,992 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 823 transitions. Word has length 149 [2020-07-20 02:03:00,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:03:00,993 INFO L479 AbstractCegarLoop]: Abstraction has 724 states and 823 transitions. [2020-07-20 02:03:00,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 02:03:00,993 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 823 transitions. [2020-07-20 02:03:00,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-07-20 02:03:00,995 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:03:00,996 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:03:01,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:03:01,210 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:03:01,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:03:01,211 INFO L82 PathProgramCache]: Analyzing trace with hash -220343204, now seen corresponding path program 43 times [2020-07-20 02:03:01,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:03:01,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757102660] [2020-07-20 02:03:01,212 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:03:01,218 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:03:01,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731323948] [2020-07-20 02:03:01,218 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@722212a4 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:03:01,293 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@722212a4 issued 4 check-sat command(s) [2020-07-20 02:03:01,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:03:01,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-20 02:03:01,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:03:01,572 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:01,885 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:02,224 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:02,619 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:03,214 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:03,858 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:04,566 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:05,336 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:06,160 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:07,048 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:07,914 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:08,905 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:09,942 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:11,027 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:12,200 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 02:03:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 32 proven. 512 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-07-20 02:03:14,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757102660] [2020-07-20 02:03:14,193 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:03:14,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731323948] [2020-07-20 02:03:14,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:03:14,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-20 02:03:14,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066518387] [2020-07-20 02:03:14,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 02:03:14,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:03:14,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 02:03:14,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-07-20 02:03:14,195 INFO L87 Difference]: Start difference. First operand 724 states and 823 transitions. Second operand 21 states. [2020-07-20 02:03:21,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:03:21,928 INFO L93 Difference]: Finished difference Result 754 states and 857 transitions. [2020-07-20 02:03:21,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 02:03:21,947 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 149 [2020-07-20 02:03:21,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:03:21,950 INFO L225 Difference]: With dead ends: 754 [2020-07-20 02:03:21,950 INFO L226 Difference]: Without dead ends: 736 [2020-07-20 02:03:21,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-07-20 02:03:21,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2020-07-20 02:03:21,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 736. [2020-07-20 02:03:21,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-07-20 02:03:21,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 836 transitions. [2020-07-20 02:03:21,998 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 836 transitions. Word has length 149 [2020-07-20 02:03:21,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:03:21,998 INFO L479 AbstractCegarLoop]: Abstraction has 736 states and 836 transitions. [2020-07-20 02:03:21,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 02:03:21,999 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 836 transitions. [2020-07-20 02:03:22,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-07-20 02:03:22,001 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:03:22,001 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 12, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:03:22,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:03:22,203 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:03:22,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:03:22,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1368447316, now seen corresponding path program 44 times [2020-07-20 02:03:22,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:03:22,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204293880] [2020-07-20 02:03:22,205 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:03:22,211 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:03:22,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121745798] [2020-07-20 02:03:22,211 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2aa4f030 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:03:22,277 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2aa4f030 issued 4 check-sat command(s) [2020-07-20 02:03:22,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:03:22,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 59 conjunts are in the unsatisfiable core [2020-07-20 02:03:22,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:03:22,627 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:22,887 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:23,190 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:23,582 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:24,026 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:24,526 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:25,268 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:26,092 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:27,018 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:28,021 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:29,073 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:30,217 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:31,463 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:32,782 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:33,878 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 02:03:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 32 proven. 512 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-07-20 02:03:35,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204293880] [2020-07-20 02:03:35,820 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:03:35,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121745798] [2020-07-20 02:03:35,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:03:35,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-20 02:03:35,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599655272] [2020-07-20 02:03:35,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 02:03:35,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:03:35,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 02:03:35,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-07-20 02:03:35,821 INFO L87 Difference]: Start difference. First operand 736 states and 836 transitions. Second operand 21 states. [2020-07-20 02:03:42,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:03:42,897 INFO L93 Difference]: Finished difference Result 760 states and 863 transitions. [2020-07-20 02:03:42,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 02:03:42,910 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 149 [2020-07-20 02:03:42,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:03:42,913 INFO L225 Difference]: With dead ends: 760 [2020-07-20 02:03:42,913 INFO L226 Difference]: Without dead ends: 758 [2020-07-20 02:03:42,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-07-20 02:03:42,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2020-07-20 02:03:42,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 756. [2020-07-20 02:03:42,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 756 states. [2020-07-20 02:03:42,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 859 transitions. [2020-07-20 02:03:42,944 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 859 transitions. Word has length 149 [2020-07-20 02:03:42,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:03:42,944 INFO L479 AbstractCegarLoop]: Abstraction has 756 states and 859 transitions. [2020-07-20 02:03:42,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 02:03:42,944 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 859 transitions. [2020-07-20 02:03:42,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-07-20 02:03:42,946 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:03:42,946 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 14, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:03:43,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-07-20 02:03:43,147 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:03:43,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:03:43,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1527620656, now seen corresponding path program 45 times [2020-07-20 02:03:43,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:03:43,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222953123] [2020-07-20 02:03:43,148 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:03:43,152 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:03:43,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597130681] [2020-07-20 02:03:43,152 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@538face8 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:03:43,214 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@538face8 issued 4 check-sat command(s) [2020-07-20 02:03:43,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:03:43,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-20 02:03:43,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:03:43,488 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:43,736 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:44,031 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:44,372 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:44,729 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:45,114 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:45,530 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:46,110 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:46,747 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:47,448 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:48,192 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:49,013 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:50,759 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 02:03:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 32 proven. 512 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-07-20 02:03:51,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222953123] [2020-07-20 02:03:51,674 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:03:51,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597130681] [2020-07-20 02:03:51,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:03:51,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-20 02:03:51,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729861445] [2020-07-20 02:03:51,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 02:03:51,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:03:51,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 02:03:51,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-07-20 02:03:51,676 INFO L87 Difference]: Start difference. First operand 756 states and 859 transitions. Second operand 21 states. [2020-07-20 02:03:56,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:03:56,601 INFO L93 Difference]: Finished difference Result 796 states and 907 transitions. [2020-07-20 02:03:56,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 02:03:56,615 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 149 [2020-07-20 02:03:56,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:03:56,618 INFO L225 Difference]: With dead ends: 796 [2020-07-20 02:03:56,618 INFO L226 Difference]: Without dead ends: 794 [2020-07-20 02:03:56,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-07-20 02:03:56,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-07-20 02:03:56,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 784. [2020-07-20 02:03:56,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2020-07-20 02:03:56,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 894 transitions. [2020-07-20 02:03:56,647 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 894 transitions. Word has length 149 [2020-07-20 02:03:56,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:03:56,647 INFO L479 AbstractCegarLoop]: Abstraction has 784 states and 894 transitions. [2020-07-20 02:03:56,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 02:03:56,647 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 894 transitions. [2020-07-20 02:03:56,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-07-20 02:03:56,649 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:03:56,649 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:03:56,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-07-20 02:03:56,850 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:03:56,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:03:56,850 INFO L82 PathProgramCache]: Analyzing trace with hash 380837134, now seen corresponding path program 46 times [2020-07-20 02:03:56,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:03:56,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422283395] [2020-07-20 02:03:56,851 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:03:56,855 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:03:56,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729656408] [2020-07-20 02:03:56,855 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49b605e8 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:03:56,908 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49b605e8 issued 4 check-sat command(s) [2020-07-20 02:03:56,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:03:56,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 77 conjunts are in the unsatisfiable core [2020-07-20 02:03:56,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:03:57,131 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:57,306 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:57,520 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:57,746 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:57,985 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:58,246 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:58,800 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:59,121 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:59,467 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:59,854 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:00,255 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:00,657 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:01,095 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:01,542 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 02:04:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 32 proven. 512 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-07-20 02:04:02,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422283395] [2020-07-20 02:04:02,188 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:04:02,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729656408] [2020-07-20 02:04:02,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:04:02,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-20 02:04:02,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925492613] [2020-07-20 02:04:02,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 02:04:02,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:04:02,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 02:04:02,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-07-20 02:04:02,189 INFO L87 Difference]: Start difference. First operand 784 states and 894 transitions. Second operand 21 states. [2020-07-20 02:04:06,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:04:06,770 INFO L93 Difference]: Finished difference Result 804 states and 916 transitions. [2020-07-20 02:04:06,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 02:04:06,770 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 149 [2020-07-20 02:04:06,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:04:06,774 INFO L225 Difference]: With dead ends: 804 [2020-07-20 02:04:06,774 INFO L226 Difference]: Without dead ends: 802 [2020-07-20 02:04:06,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-07-20 02:04:06,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2020-07-20 02:04:06,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 792. [2020-07-20 02:04:06,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-07-20 02:04:06,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 903 transitions. [2020-07-20 02:04:06,814 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 903 transitions. Word has length 149 [2020-07-20 02:04:06,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:04:06,814 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 903 transitions. [2020-07-20 02:04:06,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 02:04:06,815 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 903 transitions. [2020-07-20 02:04:06,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-07-20 02:04:06,817 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:04:06,817 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:04:07,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:04:07,031 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:04:07,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:04:07,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1629621679, now seen corresponding path program 17 times [2020-07-20 02:04:07,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:04:07,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344441979] [2020-07-20 02:04:07,032 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:04:07,037 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:04:07,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [669033483] [2020-07-20 02:04:07,038 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@34d54b10 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:04:07,170 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@34d54b10 issued 4 check-sat command(s) [2020-07-20 02:04:07,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:04:07,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 81 conjunts are in the unsatisfiable core [2020-07-20 02:04:07,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:04:07,437 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:07,639 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:07,856 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:08,091 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:08,343 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:08,625 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:08,945 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:09,281 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:09,656 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:10,044 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:10,450 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:10,887 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:11,299 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:11,781 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:12,280 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:12,822 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 02:04:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 34 proven. 578 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2020-07-20 02:04:13,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344441979] [2020-07-20 02:04:13,566 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:04:13,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669033483] [2020-07-20 02:04:13,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:04:13,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-07-20 02:04:13,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510573391] [2020-07-20 02:04:13,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 02:04:13,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:04:13,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 02:04:13,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-07-20 02:04:13,568 INFO L87 Difference]: Start difference. First operand 792 states and 903 transitions. Second operand 22 states. [2020-07-20 02:04:18,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:04:18,608 INFO L93 Difference]: Finished difference Result 820 states and 934 transitions. [2020-07-20 02:04:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 02:04:18,614 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 157 [2020-07-20 02:04:18,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:04:18,618 INFO L225 Difference]: With dead ends: 820 [2020-07-20 02:04:18,618 INFO L226 Difference]: Without dead ends: 802 [2020-07-20 02:04:18,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-07-20 02:04:18,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2020-07-20 02:04:18,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 800. [2020-07-20 02:04:18,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 800 states. [2020-07-20 02:04:18,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 911 transitions. [2020-07-20 02:04:18,646 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 911 transitions. Word has length 157 [2020-07-20 02:04:18,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:04:18,646 INFO L479 AbstractCegarLoop]: Abstraction has 800 states and 911 transitions. [2020-07-20 02:04:18,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 02:04:18,646 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 911 transitions. [2020-07-20 02:04:18,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-07-20 02:04:18,648 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:04:18,648 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 15, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:04:18,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-07-20 02:04:18,849 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:04:18,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:04:18,849 INFO L82 PathProgramCache]: Analyzing trace with hash -911838477, now seen corresponding path program 47 times [2020-07-20 02:04:18,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:04:18,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142868545] [2020-07-20 02:04:18,850 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:04:18,854 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:04:18,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020782215] [2020-07-20 02:04:18,854 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@a668dd No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:04:18,894 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@a668dd issued 1 check-sat command(s) [2020-07-20 02:04:18,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:04:18,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 02:04:18,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:04:19,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 212 proven. 400 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2020-07-20 02:04:19,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142868545] [2020-07-20 02:04:19,136 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:04:19,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020782215] [2020-07-20 02:04:19,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:04:19,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-07-20 02:04:19,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291796904] [2020-07-20 02:04:19,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 02:04:19,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:04:19,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 02:04:19,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-07-20 02:04:19,137 INFO L87 Difference]: Start difference. First operand 800 states and 911 transitions. Second operand 19 states. [2020-07-20 02:04:19,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:04:19,762 INFO L93 Difference]: Finished difference Result 888 states and 1021 transitions. [2020-07-20 02:04:19,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 02:04:19,767 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 157 [2020-07-20 02:04:19,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:04:19,770 INFO L225 Difference]: With dead ends: 888 [2020-07-20 02:04:19,771 INFO L226 Difference]: Without dead ends: 842 [2020-07-20 02:04:19,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2020-07-20 02:04:19,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2020-07-20 02:04:19,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 840. [2020-07-20 02:04:19,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 840 states. [2020-07-20 02:04:19,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 962 transitions. [2020-07-20 02:04:19,798 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 962 transitions. Word has length 157 [2020-07-20 02:04:19,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:04:19,798 INFO L479 AbstractCegarLoop]: Abstraction has 840 states and 962 transitions. [2020-07-20 02:04:19,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 02:04:19,798 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 962 transitions. [2020-07-20 02:04:19,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-07-20 02:04:19,800 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:04:19,800 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 15, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:04:20,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-07-20 02:04:20,015 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:04:20,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:04:20,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1981262605, now seen corresponding path program 48 times [2020-07-20 02:04:20,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:04:20,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871569625] [2020-07-20 02:04:20,016 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:04:20,020 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:04:20,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326256552] [2020-07-20 02:04:20,020 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e64664d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:04:20,059 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e64664d issued 1 check-sat command(s) [2020-07-20 02:04:20,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:04:20,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 02:04:20,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:04:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 212 proven. 400 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2020-07-20 02:04:20,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871569625] [2020-07-20 02:04:20,304 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:04:20,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326256552] [2020-07-20 02:04:20,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:04:20,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-07-20 02:04:20,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296733341] [2020-07-20 02:04:20,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 02:04:20,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:04:20,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 02:04:20,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-07-20 02:04:20,306 INFO L87 Difference]: Start difference. First operand 840 states and 962 transitions. Second operand 19 states. [2020-07-20 02:04:21,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:04:21,319 INFO L93 Difference]: Finished difference Result 884 states and 1012 transitions. [2020-07-20 02:04:21,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 02:04:21,324 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 157 [2020-07-20 02:04:21,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:04:21,327 INFO L225 Difference]: With dead ends: 884 [2020-07-20 02:04:21,327 INFO L226 Difference]: Without dead ends: 842 [2020-07-20 02:04:21,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2020-07-20 02:04:21,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2020-07-20 02:04:21,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 840. [2020-07-20 02:04:21,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 840 states. [2020-07-20 02:04:21,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 961 transitions. [2020-07-20 02:04:21,358 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 961 transitions. Word has length 157 [2020-07-20 02:04:21,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:04:21,359 INFO L479 AbstractCegarLoop]: Abstraction has 840 states and 961 transitions. [2020-07-20 02:04:21,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 02:04:21,359 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 961 transitions. [2020-07-20 02:04:21,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-07-20 02:04:21,361 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:04:21,361 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:04:21,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2020-07-20 02:04:21,573 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:04:21,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:04:21,573 INFO L82 PathProgramCache]: Analyzing trace with hash -72804815, now seen corresponding path program 49 times [2020-07-20 02:04:21,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:04:21,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323162771] [2020-07-20 02:04:21,574 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:04:21,577 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:04:21,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018366940] [2020-07-20 02:04:21,577 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ad00d62 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:04:21,650 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ad00d62 issued 4 check-sat command(s) [2020-07-20 02:04:21,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:04:21,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 81 conjunts are in the unsatisfiable core [2020-07-20 02:04:21,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:04:21,868 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:22,039 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:22,226 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:22,435 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:22,673 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:22,933 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:23,205 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:23,498 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:23,813 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:24,153 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:24,514 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:24,915 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:25,330 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:25,771 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:26,220 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:26,702 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 02:04:27,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 34 proven. 578 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2020-07-20 02:04:27,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323162771] [2020-07-20 02:04:27,445 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:04:27,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018366940] [2020-07-20 02:04:27,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:04:27,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-07-20 02:04:27,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647628688] [2020-07-20 02:04:27,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 02:04:27,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:04:27,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 02:04:27,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-07-20 02:04:27,447 INFO L87 Difference]: Start difference. First operand 840 states and 961 transitions. Second operand 22 states. [2020-07-20 02:04:32,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:04:32,554 INFO L93 Difference]: Finished difference Result 858 states and 980 transitions. [2020-07-20 02:04:32,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 02:04:32,554 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 157 [2020-07-20 02:04:32,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:04:32,557 INFO L225 Difference]: With dead ends: 858 [2020-07-20 02:04:32,557 INFO L226 Difference]: Without dead ends: 856 [2020-07-20 02:04:32,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-07-20 02:04:32,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2020-07-20 02:04:32,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 854. [2020-07-20 02:04:32,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 854 states. [2020-07-20 02:04:32,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 976 transitions. [2020-07-20 02:04:32,597 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 976 transitions. Word has length 157 [2020-07-20 02:04:32,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:04:32,598 INFO L479 AbstractCegarLoop]: Abstraction has 854 states and 976 transitions. [2020-07-20 02:04:32,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 02:04:32,598 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 976 transitions. [2020-07-20 02:04:32,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-07-20 02:04:32,602 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:04:32,602 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:04:32,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:04:32,818 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:04:32,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:04:32,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1269013194, now seen corresponding path program 18 times [2020-07-20 02:04:32,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:04:32,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072218849] [2020-07-20 02:04:32,820 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:04:32,824 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:04:32,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198525435] [2020-07-20 02:04:32,824 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8a91e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:04:32,916 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8a91e issued 4 check-sat command(s) [2020-07-20 02:04:32,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:04:32,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 85 conjunts are in the unsatisfiable core [2020-07-20 02:04:32,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:04:33,138 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:33,310 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:33,502 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:33,714 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:33,940 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:34,183 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:34,459 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:34,764 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:35,069 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:35,394 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:35,753 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:36,133 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:36,538 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:36,961 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:37,412 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:37,880 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:38,381 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 02:04:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 36 proven. 648 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2020-07-20 02:04:39,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072218849] [2020-07-20 02:04:39,172 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:04:39,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198525435] [2020-07-20 02:04:39,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:04:39,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-20 02:04:39,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237633651] [2020-07-20 02:04:39,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 02:04:39,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:04:39,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 02:04:39,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-07-20 02:04:39,173 INFO L87 Difference]: Start difference. First operand 854 states and 976 transitions. Second operand 23 states. [2020-07-20 02:04:44,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:04:44,684 INFO L93 Difference]: Finished difference Result 882 states and 1007 transitions. [2020-07-20 02:04:44,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 02:04:44,684 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 165 [2020-07-20 02:04:44,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:04:44,688 INFO L225 Difference]: With dead ends: 882 [2020-07-20 02:04:44,690 INFO L226 Difference]: Without dead ends: 864 [2020-07-20 02:04:44,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-07-20 02:04:44,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2020-07-20 02:04:44,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 862. [2020-07-20 02:04:44,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 862 states. [2020-07-20 02:04:44,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 984 transitions. [2020-07-20 02:04:44,734 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 984 transitions. Word has length 165 [2020-07-20 02:04:44,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:04:44,735 INFO L479 AbstractCegarLoop]: Abstraction has 862 states and 984 transitions. [2020-07-20 02:04:44,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 02:04:44,735 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 984 transitions. [2020-07-20 02:04:44,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-07-20 02:04:44,736 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:04:44,737 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:04:44,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:04:44,938 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:04:44,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:04:44,938 INFO L82 PathProgramCache]: Analyzing trace with hash 763634276, now seen corresponding path program 50 times [2020-07-20 02:04:44,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:04:44,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014714482] [2020-07-20 02:04:44,939 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:04:44,943 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:04:44,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843387423] [2020-07-20 02:04:44,943 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66939c86 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:04:45,008 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66939c86 issued 4 check-sat command(s) [2020-07-20 02:04:45,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:04:45,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 69 conjunts are in the unsatisfiable core [2020-07-20 02:04:45,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:04:45,239 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:45,463 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:04:45,720 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:46,016 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:46,498 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:04:47,015 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:04:47,611 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:04:48,256 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:04:48,969 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:04:49,731 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:04:50,555 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:04:51,409 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:04:52,377 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:04:53,456 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:04:54,612 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:04:55,807 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:04:57,110 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 02:04:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 36 proven. 648 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2020-07-20 02:04:59,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014714482] [2020-07-20 02:04:59,176 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:04:59,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843387423] [2020-07-20 02:04:59,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:04:59,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-20 02:04:59,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261058741] [2020-07-20 02:04:59,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 02:04:59,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:04:59,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 02:04:59,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-07-20 02:04:59,178 INFO L87 Difference]: Start difference. First operand 862 states and 984 transitions. Second operand 23 states. [2020-07-20 02:05:06,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:05:06,708 INFO L93 Difference]: Finished difference Result 892 states and 1018 transitions. [2020-07-20 02:05:06,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 02:05:06,724 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 165 [2020-07-20 02:05:06,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:05:06,728 INFO L225 Difference]: With dead ends: 892 [2020-07-20 02:05:06,728 INFO L226 Difference]: Without dead ends: 874 [2020-07-20 02:05:06,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-07-20 02:05:06,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-07-20 02:05:06,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 874. [2020-07-20 02:05:06,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 874 states. [2020-07-20 02:05:06,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 997 transitions. [2020-07-20 02:05:06,776 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 997 transitions. Word has length 165 [2020-07-20 02:05:06,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:05:06,777 INFO L479 AbstractCegarLoop]: Abstraction has 874 states and 997 transitions. [2020-07-20 02:05:06,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 02:05:06,777 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 997 transitions. [2020-07-20 02:05:06,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-07-20 02:05:06,781 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:05:06,782 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 12, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:05:06,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:05:06,996 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:05:06,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:05:06,997 INFO L82 PathProgramCache]: Analyzing trace with hash 306056222, now seen corresponding path program 51 times [2020-07-20 02:05:06,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:05:06,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472886313] [2020-07-20 02:05:06,997 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:05:07,002 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:05:07,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1199661943] [2020-07-20 02:05:07,003 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@524acf61 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:05:07,084 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@524acf61 issued 4 check-sat command(s) [2020-07-20 02:05:07,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:05:07,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 65 conjunts are in the unsatisfiable core [2020-07-20 02:05:07,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:05:07,358 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:07,573 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:07,873 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:08,231 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:08,756 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:09,345 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:09,993 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:10,531 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:11,122 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:11,754 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:12,546 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:13,489 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:14,479 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:15,491 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:16,530 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:17,677 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:18,869 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 02:05:20,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 36 proven. 648 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2020-07-20 02:05:20,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472886313] [2020-07-20 02:05:20,716 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:05:20,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199661943] [2020-07-20 02:05:20,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:05:20,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-20 02:05:20,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177995993] [2020-07-20 02:05:20,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 02:05:20,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:05:20,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 02:05:20,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-07-20 02:05:20,717 INFO L87 Difference]: Start difference. First operand 874 states and 997 transitions. Second operand 23 states. [2020-07-20 02:05:28,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:05:28,255 INFO L93 Difference]: Finished difference Result 894 states and 1019 transitions. [2020-07-20 02:05:28,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 02:05:28,271 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 165 [2020-07-20 02:05:28,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:05:28,276 INFO L225 Difference]: With dead ends: 894 [2020-07-20 02:05:28,276 INFO L226 Difference]: Without dead ends: 892 [2020-07-20 02:05:28,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-07-20 02:05:28,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2020-07-20 02:05:28,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 890. [2020-07-20 02:05:28,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2020-07-20 02:05:28,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1015 transitions. [2020-07-20 02:05:28,328 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1015 transitions. Word has length 165 [2020-07-20 02:05:28,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:05:28,329 INFO L479 AbstractCegarLoop]: Abstraction has 890 states and 1015 transitions. [2020-07-20 02:05:28,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 02:05:28,329 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1015 transitions. [2020-07-20 02:05:28,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-07-20 02:05:28,332 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:05:28,333 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 15, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:05:28,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-07-20 02:05:28,548 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:05:28,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:05:28,548 INFO L82 PathProgramCache]: Analyzing trace with hash 738063832, now seen corresponding path program 52 times [2020-07-20 02:05:28,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:05:28,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986145740] [2020-07-20 02:05:28,549 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:05:28,553 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:05:28,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [777836168] [2020-07-20 02:05:28,554 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@61a1dea9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:05:28,632 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@61a1dea9 issued 4 check-sat command(s) [2020-07-20 02:05:28,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:05:28,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 65 conjunts are in the unsatisfiable core [2020-07-20 02:05:28,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:05:28,885 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:29,090 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:29,317 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:29,571 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:29,845 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:30,233 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:30,666 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:31,125 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:31,625 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:32,159 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:32,974 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:33,884 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:34,849 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:35,857 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:36,916 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:38,042 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:39,274 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 02:05:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 36 proven. 648 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2020-07-20 02:05:40,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986145740] [2020-07-20 02:05:40,996 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:05:40,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777836168] [2020-07-20 02:05:40,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:05:40,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-20 02:05:40,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564747375] [2020-07-20 02:05:40,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 02:05:40,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:05:40,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 02:05:40,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-07-20 02:05:40,997 INFO L87 Difference]: Start difference. First operand 890 states and 1015 transitions. Second operand 23 states. [2020-07-20 02:05:48,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:05:48,390 INFO L93 Difference]: Finished difference Result 922 states and 1052 transitions. [2020-07-20 02:05:48,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 02:05:48,406 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 165 [2020-07-20 02:05:48,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:05:48,414 INFO L225 Difference]: With dead ends: 922 [2020-07-20 02:05:48,416 INFO L226 Difference]: Without dead ends: 920 [2020-07-20 02:05:48,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-07-20 02:05:48,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2020-07-20 02:05:48,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 918. [2020-07-20 02:05:48,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 918 states. [2020-07-20 02:05:48,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1048 transitions. [2020-07-20 02:05:48,470 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1048 transitions. Word has length 165 [2020-07-20 02:05:48,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:05:48,471 INFO L479 AbstractCegarLoop]: Abstraction has 918 states and 1048 transitions. [2020-07-20 02:05:48,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 02:05:48,471 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1048 transitions. [2020-07-20 02:05:48,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-07-20 02:05:48,473 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:05:48,474 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 16, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:05:48,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:05:48,688 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:05:48,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:05:48,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1091659498, now seen corresponding path program 53 times [2020-07-20 02:05:48,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:05:48,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127569328] [2020-07-20 02:05:48,689 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:05:48,693 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:05:48,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712563928] [2020-07-20 02:05:48,693 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1b34e795 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:05:48,759 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1b34e795 issued 4 check-sat command(s) [2020-07-20 02:05:48,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:05:48,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 69 conjunts are in the unsatisfiable core [2020-07-20 02:05:48,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:05:49,027 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:49,231 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:49,459 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:49,731 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:50,035 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:50,339 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:50,668 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:51,037 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:51,566 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:52,131 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:52,730 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:53,364 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:54,050 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:54,770 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:55,648 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:56,539 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:57,766 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 02:05:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 36 proven. 648 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2020-07-20 02:05:59,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127569328] [2020-07-20 02:05:59,114 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:05:59,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712563928] [2020-07-20 02:05:59,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:05:59,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-20 02:05:59,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896764890] [2020-07-20 02:05:59,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 02:05:59,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:05:59,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 02:05:59,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-07-20 02:05:59,115 INFO L87 Difference]: Start difference. First operand 918 states and 1048 transitions. Second operand 23 states. [2020-07-20 02:06:06,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:06:06,485 INFO L93 Difference]: Finished difference Result 964 states and 1104 transitions. [2020-07-20 02:06:06,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 02:06:06,502 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 165 [2020-07-20 02:06:06,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:06:06,504 INFO L225 Difference]: With dead ends: 964 [2020-07-20 02:06:06,504 INFO L226 Difference]: Without dead ends: 962 [2020-07-20 02:06:06,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-07-20 02:06:06,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2020-07-20 02:06:06,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 952. [2020-07-20 02:06:06,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 952 states. [2020-07-20 02:06:06,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1091 transitions. [2020-07-20 02:06:06,534 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1091 transitions. Word has length 165 [2020-07-20 02:06:06,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:06:06,534 INFO L479 AbstractCegarLoop]: Abstraction has 952 states and 1091 transitions. [2020-07-20 02:06:06,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 02:06:06,534 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1091 transitions. [2020-07-20 02:06:06,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-07-20 02:06:06,536 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:06:06,536 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:06:06,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:06:06,737 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:06:06,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:06:06,737 INFO L82 PathProgramCache]: Analyzing trace with hash -252625836, now seen corresponding path program 54 times [2020-07-20 02:06:06,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:06:06,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417055652] [2020-07-20 02:06:06,738 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:06:06,742 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:06:06,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70157810] [2020-07-20 02:06:06,742 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2442bb7b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:06:06,801 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2442bb7b issued 4 check-sat command(s) [2020-07-20 02:06:06,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:06:06,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 85 conjunts are in the unsatisfiable core [2020-07-20 02:06:06,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:06:07,110 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:07,341 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:07,578 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:07,834 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:08,124 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:08,438 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:08,778 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:09,154 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:09,547 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:09,973 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:10,410 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:10,886 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:11,403 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:11,949 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:12,528 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:13,143 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:13,813 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 02:06:14,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 36 proven. 648 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2020-07-20 02:06:14,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417055652] [2020-07-20 02:06:14,745 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:06:14,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70157810] [2020-07-20 02:06:14,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:06:14,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-20 02:06:14,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944968072] [2020-07-20 02:06:14,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 02:06:14,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:06:14,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 02:06:14,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-07-20 02:06:14,746 INFO L87 Difference]: Start difference. First operand 952 states and 1091 transitions. Second operand 23 states. [2020-07-20 02:06:21,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:06:21,700 INFO L93 Difference]: Finished difference Result 972 states and 1113 transitions. [2020-07-20 02:06:21,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 02:06:21,701 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 165 [2020-07-20 02:06:21,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:06:21,702 INFO L225 Difference]: With dead ends: 972 [2020-07-20 02:06:21,703 INFO L226 Difference]: Without dead ends: 970 [2020-07-20 02:06:21,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-07-20 02:06:21,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-07-20 02:06:21,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 960. [2020-07-20 02:06:21,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 960 states. [2020-07-20 02:06:21,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1100 transitions. [2020-07-20 02:06:21,732 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1100 transitions. Word has length 165 [2020-07-20 02:06:21,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:06:21,732 INFO L479 AbstractCegarLoop]: Abstraction has 960 states and 1100 transitions. [2020-07-20 02:06:21,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 02:06:21,732 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1100 transitions. [2020-07-20 02:06:21,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-07-20 02:06:21,734 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:06:21,734 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:06:21,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-07-20 02:06:21,935 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:06:21,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:06:21,936 INFO L82 PathProgramCache]: Analyzing trace with hash -2038422757, now seen corresponding path program 19 times [2020-07-20 02:06:21,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:06:21,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732864139] [2020-07-20 02:06:21,936 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:06:21,940 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:06:21,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271125397] [2020-07-20 02:06:21,940 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@540c8fec No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:06:22,029 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@540c8fec issued 4 check-sat command(s) [2020-07-20 02:06:22,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:06:22,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 89 conjunts are in the unsatisfiable core [2020-07-20 02:06:22,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:06:22,322 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:22,566 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:22,822 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:23,121 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:23,414 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:23,740 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:24,103 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:24,498 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:24,894 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:25,317 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:25,797 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:26,287 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:26,799 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:27,339 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:27,911 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:28,520 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:29,152 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:29,840 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 02:06:30,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1448 backedges. 38 proven. 722 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2020-07-20 02:06:30,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732864139] [2020-07-20 02:06:30,935 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:06:30,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271125397] [2020-07-20 02:06:30,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:06:30,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-07-20 02:06:30,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253904790] [2020-07-20 02:06:30,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 02:06:30,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:06:30,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 02:06:30,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-07-20 02:06:30,936 INFO L87 Difference]: Start difference. First operand 960 states and 1100 transitions. Second operand 24 states. [2020-07-20 02:06:38,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:06:38,406 INFO L93 Difference]: Finished difference Result 988 states and 1131 transitions. [2020-07-20 02:06:38,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 02:06:38,406 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 173 [2020-07-20 02:06:38,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:06:38,409 INFO L225 Difference]: With dead ends: 988 [2020-07-20 02:06:38,409 INFO L226 Difference]: Without dead ends: 970 [2020-07-20 02:06:38,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2020-07-20 02:06:38,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-07-20 02:06:38,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-07-20 02:06:38,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-07-20 02:06:38,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1108 transitions. [2020-07-20 02:06:38,460 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1108 transitions. Word has length 173 [2020-07-20 02:06:38,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:06:38,460 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1108 transitions. [2020-07-20 02:06:38,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 02:06:38,460 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1108 transitions. [2020-07-20 02:06:38,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-07-20 02:06:38,463 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:06:38,463 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 17, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:06:38,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-07-20 02:06:38,669 INFO L427 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:06:38,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:06:38,670 INFO L82 PathProgramCache]: Analyzing trace with hash 13371961, now seen corresponding path program 55 times [2020-07-20 02:06:38,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:06:38,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301321868] [2020-07-20 02:06:38,670 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:06:38,678 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:06:38,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91752082] [2020-07-20 02:06:38,678 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8f5262f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:06:38,718 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8f5262f issued 1 check-sat command(s) [2020-07-20 02:06:38,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:06:38,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 02:06:38,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:06:38,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1448 backedges. 256 proven. 504 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2020-07-20 02:06:38,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301321868] [2020-07-20 02:06:38,987 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:06:38,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91752082] [2020-07-20 02:06:38,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:06:38,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-20 02:06:38,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146727873] [2020-07-20 02:06:38,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 02:06:38,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:06:38,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 02:06:38,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2020-07-20 02:06:38,988 INFO L87 Difference]: Start difference. First operand 968 states and 1108 transitions. Second operand 21 states. [2020-07-20 02:06:40,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:06:40,264 INFO L93 Difference]: Finished difference Result 1064 states and 1228 transitions. [2020-07-20 02:06:40,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 02:06:40,270 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 173 [2020-07-20 02:06:40,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:06:40,272 INFO L225 Difference]: With dead ends: 1064 [2020-07-20 02:06:40,272 INFO L226 Difference]: Without dead ends: 1014 [2020-07-20 02:06:40,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=642, Unknown=0, NotChecked=0, Total=870 [2020-07-20 02:06:40,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2020-07-20 02:06:40,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 1012. [2020-07-20 02:06:40,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1012 states. [2020-07-20 02:06:40,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1164 transitions. [2020-07-20 02:06:40,308 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1164 transitions. Word has length 173 [2020-07-20 02:06:40,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:06:40,308 INFO L479 AbstractCegarLoop]: Abstraction has 1012 states and 1164 transitions. [2020-07-20 02:06:40,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 02:06:40,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1164 transitions. [2020-07-20 02:06:40,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-07-20 02:06:40,311 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:06:40,311 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 17, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:06:40,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:06:40,520 INFO L427 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:06:40,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:06:40,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1510730809, now seen corresponding path program 56 times [2020-07-20 02:06:40,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:06:40,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678535140] [2020-07-20 02:06:40,522 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:06:40,526 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:06:40,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767645227] [2020-07-20 02:06:40,526 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@50df1abc No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:06:40,566 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@50df1abc issued 1 check-sat command(s) [2020-07-20 02:06:40,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:06:40,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 02:06:40,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:06:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1448 backedges. 256 proven. 504 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2020-07-20 02:06:40,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678535140] [2020-07-20 02:06:40,842 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:06:40,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767645227] [2020-07-20 02:06:40,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:06:40,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-20 02:06:40,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739758332] [2020-07-20 02:06:40,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 02:06:40,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:06:40,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 02:06:40,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2020-07-20 02:06:40,844 INFO L87 Difference]: Start difference. First operand 1012 states and 1164 transitions. Second operand 21 states. [2020-07-20 02:06:41,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:06:41,713 INFO L93 Difference]: Finished difference Result 1060 states and 1219 transitions. [2020-07-20 02:06:41,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 02:06:41,719 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 173 [2020-07-20 02:06:41,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:06:41,721 INFO L225 Difference]: With dead ends: 1060 [2020-07-20 02:06:41,721 INFO L226 Difference]: Without dead ends: 1014 [2020-07-20 02:06:41,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=642, Unknown=0, NotChecked=0, Total=870 [2020-07-20 02:06:41,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2020-07-20 02:06:41,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 1012. [2020-07-20 02:06:41,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1012 states. [2020-07-20 02:06:41,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1163 transitions. [2020-07-20 02:06:41,767 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1163 transitions. Word has length 173 [2020-07-20 02:06:41,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:06:41,768 INFO L479 AbstractCegarLoop]: Abstraction has 1012 states and 1163 transitions. [2020-07-20 02:06:41,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 02:06:41,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1163 transitions. [2020-07-20 02:06:41,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-07-20 02:06:41,770 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:06:41,770 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:06:41,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:06:41,971 INFO L427 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:06:41,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:06:41,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1945202825, now seen corresponding path program 57 times [2020-07-20 02:06:41,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:06:41,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291615302] [2020-07-20 02:06:41,972 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:06:41,976 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:06:41,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509091444] [2020-07-20 02:06:41,976 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@27704fa8 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:06:42,034 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@27704fa8 issued 4 check-sat command(s) [2020-07-20 02:06:42,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:06:42,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 89 conjunts are in the unsatisfiable core [2020-07-20 02:06:42,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:06:42,343 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:42,583 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:42,831 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:43,119 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:43,424 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:43,746 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:44,123 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:44,516 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:44,943 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:45,392 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:45,870 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:46,346 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:46,853 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:47,407 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:47,982 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:48,598 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:49,240 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:49,936 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 02:06:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1448 backedges. 38 proven. 722 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2020-07-20 02:06:50,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291615302] [2020-07-20 02:06:50,994 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:06:50,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509091444] [2020-07-20 02:06:50,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:06:50,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-07-20 02:06:50,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246972514] [2020-07-20 02:06:50,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 02:06:50,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:06:50,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 02:06:50,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-07-20 02:06:50,996 INFO L87 Difference]: Start difference. First operand 1012 states and 1163 transitions. Second operand 24 states. [2020-07-20 02:06:58,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:06:58,870 INFO L93 Difference]: Finished difference Result 1030 states and 1182 transitions. [2020-07-20 02:06:58,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 02:06:58,871 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 173 [2020-07-20 02:06:58,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:06:58,873 INFO L225 Difference]: With dead ends: 1030 [2020-07-20 02:06:58,873 INFO L226 Difference]: Without dead ends: 1028 [2020-07-20 02:06:58,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2020-07-20 02:06:58,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2020-07-20 02:06:58,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 1026. [2020-07-20 02:06:58,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1026 states. [2020-07-20 02:06:58,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1178 transitions. [2020-07-20 02:06:58,913 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1178 transitions. Word has length 173 [2020-07-20 02:06:58,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:06:58,913 INFO L479 AbstractCegarLoop]: Abstraction has 1026 states and 1178 transitions. [2020-07-20 02:06:58,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 02:06:58,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1178 transitions. [2020-07-20 02:06:58,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-07-20 02:06:58,915 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:06:58,916 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:06:59,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:06:59,116 INFO L427 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:06:59,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:06:59,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1395774464, now seen corresponding path program 20 times [2020-07-20 02:06:59,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:06:59,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303104991] [2020-07-20 02:06:59,118 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:06:59,122 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:06:59,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907617477] [2020-07-20 02:06:59,122 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5d3885d9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:06:59,222 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5d3885d9 issued 4 check-sat command(s) [2020-07-20 02:06:59,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:06:59,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 93 conjunts are in the unsatisfiable core [2020-07-20 02:06:59,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:06:59,518 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:59,772 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:00,050 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:00,369 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:00,719 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:01,090 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:01,465 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:01,868 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:02,297 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:02,744 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:03,214 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:03,723 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:04,273 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:04,852 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:05,463 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:06,091 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:06,754 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:07,442 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:08,160 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 02:07:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1604 backedges. 40 proven. 800 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2020-07-20 02:07:09,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303104991] [2020-07-20 02:07:09,319 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:07:09,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907617477] [2020-07-20 02:07:09,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:07:09,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-07-20 02:07:09,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134813211] [2020-07-20 02:07:09,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 02:07:09,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:07:09,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 02:07:09,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-07-20 02:07:09,320 INFO L87 Difference]: Start difference. First operand 1026 states and 1178 transitions. Second operand 25 states. [2020-07-20 02:07:17,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:07:17,862 INFO L93 Difference]: Finished difference Result 1054 states and 1209 transitions. [2020-07-20 02:07:17,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 02:07:17,863 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 181 [2020-07-20 02:07:17,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:07:17,865 INFO L225 Difference]: With dead ends: 1054 [2020-07-20 02:07:17,865 INFO L226 Difference]: Without dead ends: 1036 [2020-07-20 02:07:17,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-07-20 02:07:17,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2020-07-20 02:07:17,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 1034. [2020-07-20 02:07:17,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2020-07-20 02:07:17,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1186 transitions. [2020-07-20 02:07:17,917 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1186 transitions. Word has length 181 [2020-07-20 02:07:17,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:07:17,917 INFO L479 AbstractCegarLoop]: Abstraction has 1034 states and 1186 transitions. [2020-07-20 02:07:17,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 02:07:17,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1186 transitions. [2020-07-20 02:07:17,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-07-20 02:07:17,920 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:07:17,921 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:07:18,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:07:18,135 INFO L427 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:07:18,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:07:18,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1558355860, now seen corresponding path program 58 times [2020-07-20 02:07:18,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:07:18,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170250328] [2020-07-20 02:07:18,136 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:07:18,141 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:07:18,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737657358] [2020-07-20 02:07:18,141 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@766cea03 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:07:18,225 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@766cea03 issued 4 check-sat command(s) [2020-07-20 02:07:18,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:07:18,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 75 conjunts are in the unsatisfiable core [2020-07-20 02:07:18,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:07:18,536 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:18,836 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:07:19,193 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:19,623 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:20,247 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:07:20,942 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:07:21,738 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:07:22,585 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:07:23,522 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:07:24,516 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:07:25,569 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:07:26,724 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:07:27,963 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:07:29,233 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:07:30,617 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:07:32,089 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:07:33,612 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:07:35,252 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:07:37,106 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 02:07:39,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1604 backedges. 40 proven. 800 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2020-07-20 02:07:39,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170250328] [2020-07-20 02:07:39,924 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:07:39,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737657358] [2020-07-20 02:07:39,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:07:39,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-07-20 02:07:39,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947098957] [2020-07-20 02:07:39,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 02:07:39,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:07:39,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 02:07:39,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-07-20 02:07:39,925 INFO L87 Difference]: Start difference. First operand 1034 states and 1186 transitions. Second operand 25 states. [2020-07-20 02:07:51,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:07:51,226 INFO L93 Difference]: Finished difference Result 1064 states and 1220 transitions. [2020-07-20 02:07:51,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 02:07:51,244 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 181 [2020-07-20 02:07:51,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:07:51,247 INFO L225 Difference]: With dead ends: 1064 [2020-07-20 02:07:51,247 INFO L226 Difference]: Without dead ends: 1046 [2020-07-20 02:07:51,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-07-20 02:07:51,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2020-07-20 02:07:51,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 1046. [2020-07-20 02:07:51,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1046 states. [2020-07-20 02:07:51,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1199 transitions. [2020-07-20 02:07:51,297 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1199 transitions. Word has length 181 [2020-07-20 02:07:51,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:07:51,297 INFO L479 AbstractCegarLoop]: Abstraction has 1046 states and 1199 transitions. [2020-07-20 02:07:51,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 02:07:51,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1199 transitions. [2020-07-20 02:07:51,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-07-20 02:07:51,301 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:07:51,301 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 15, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:07:51,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:07:51,517 INFO L427 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:07:51,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:07:51,517 INFO L82 PathProgramCache]: Analyzing trace with hash -892732766, now seen corresponding path program 59 times [2020-07-20 02:07:51,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:07:51,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906698802] [2020-07-20 02:07:51,518 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:07:51,521 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:07:51,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729070682] [2020-07-20 02:07:51,521 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3e39db44 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:07:51,589 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3e39db44 issued 4 check-sat command(s) [2020-07-20 02:07:51,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:07:51,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 69 conjunts are in the unsatisfiable core [2020-07-20 02:07:51,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:07:51,933 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:52,223 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:52,539 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:52,958 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:07:53,449 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:07:53,976 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:07:54,741 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:07:55,580 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:07:56,545 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:07:57,511 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:07:58,535 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:07:59,702 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:08:00,965 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:08:02,295 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:08:03,420 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:04,580 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:05,817 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:07,113 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:08,933 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 02:08:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1604 backedges. 40 proven. 800 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2020-07-20 02:08:11,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906698802] [2020-07-20 02:08:11,457 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:08:11,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729070682] [2020-07-20 02:08:11,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:08:11,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-07-20 02:08:11,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507798108] [2020-07-20 02:08:11,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 02:08:11,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:08:11,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 02:08:11,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-07-20 02:08:11,458 INFO L87 Difference]: Start difference. First operand 1046 states and 1199 transitions. Second operand 25 states. [2020-07-20 02:08:21,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:08:21,161 INFO L93 Difference]: Finished difference Result 1070 states and 1226 transitions. [2020-07-20 02:08:21,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 02:08:21,180 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 181 [2020-07-20 02:08:21,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:08:21,182 INFO L225 Difference]: With dead ends: 1070 [2020-07-20 02:08:21,182 INFO L226 Difference]: Without dead ends: 1068 [2020-07-20 02:08:21,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-07-20 02:08:21,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2020-07-20 02:08:21,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 1066. [2020-07-20 02:08:21,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-07-20 02:08:21,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1222 transitions. [2020-07-20 02:08:21,216 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1222 transitions. Word has length 181 [2020-07-20 02:08:21,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:08:21,217 INFO L479 AbstractCegarLoop]: Abstraction has 1066 states and 1222 transitions. [2020-07-20 02:08:21,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 02:08:21,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1222 transitions. [2020-07-20 02:08:21,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-07-20 02:08:21,219 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:08:21,219 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 16, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:08:21,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-07-20 02:08:21,420 INFO L427 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:08:21,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:08:21,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1257144288, now seen corresponding path program 60 times [2020-07-20 02:08:21,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:08:21,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720138737] [2020-07-20 02:08:21,422 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:08:21,426 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:08:21,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430980388] [2020-07-20 02:08:21,426 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@785e6ad3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:08:21,503 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@785e6ad3 issued 4 check-sat command(s) [2020-07-20 02:08:21,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:08:21,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 69 conjunts are in the unsatisfiable core [2020-07-20 02:08:21,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:08:21,826 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:22,071 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:22,356 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:22,689 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:23,160 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:08:23,669 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:08:24,230 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:08:24,856 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:08:25,799 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:08:26,824 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:08:27,852 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:08:29,000 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:08:30,222 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:08:31,561 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:08:32,923 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:08:34,371 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:08:35,885 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:08:37,472 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:08:39,239 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 02:08:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1604 backedges. 40 proven. 800 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2020-07-20 02:08:41,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720138737] [2020-07-20 02:08:41,847 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:08:41,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430980388] [2020-07-20 02:08:41,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:08:41,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-07-20 02:08:41,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220781392] [2020-07-20 02:08:41,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 02:08:41,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:08:41,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 02:08:41,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-07-20 02:08:41,849 INFO L87 Difference]: Start difference. First operand 1066 states and 1222 transitions. Second operand 25 states. [2020-07-20 02:08:52,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:08:52,485 INFO L93 Difference]: Finished difference Result 1094 states and 1254 transitions. [2020-07-20 02:08:52,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 02:08:52,504 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 181 [2020-07-20 02:08:52,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:08:52,506 INFO L225 Difference]: With dead ends: 1094 [2020-07-20 02:08:52,506 INFO L226 Difference]: Without dead ends: 1092 [2020-07-20 02:08:52,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-07-20 02:08:52,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2020-07-20 02:08:52,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 1090. [2020-07-20 02:08:52,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1090 states. [2020-07-20 02:08:52,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1250 transitions. [2020-07-20 02:08:52,561 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1250 transitions. Word has length 181 [2020-07-20 02:08:52,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:08:52,561 INFO L479 AbstractCegarLoop]: Abstraction has 1090 states and 1250 transitions. [2020-07-20 02:08:52,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 02:08:52,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1250 transitions. [2020-07-20 02:08:52,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-07-20 02:08:52,565 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:08:52,565 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 18, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:08:52,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:08:52,780 INFO L427 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:08:52,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:08:52,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1539208612, now seen corresponding path program 61 times [2020-07-20 02:08:52,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:08:52,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136784558] [2020-07-20 02:08:52,780 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:08:52,792 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:08:52,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009015901] [2020-07-20 02:08:52,793 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@37c2896b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:08:52,860 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@37c2896b issued 4 check-sat command(s) [2020-07-20 02:08:52,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:08:52,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 75 conjunts are in the unsatisfiable core [2020-07-20 02:08:52,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:08:53,192 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:53,452 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:53,742 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:54,065 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:54,419 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:54,805 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:55,235 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:55,697 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:56,219 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:56,974 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:08:57,777 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:08:58,579 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:08:59,443 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:09:00,348 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:09:01,347 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:09:02,459 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:09:03,630 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:09:04,804 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:09:06,449 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 02:09:08,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1604 backedges. 40 proven. 800 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2020-07-20 02:09:08,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136784558] [2020-07-20 02:09:08,297 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:09:08,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009015901] [2020-07-20 02:09:08,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:09:08,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-07-20 02:09:08,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422995169] [2020-07-20 02:09:08,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 02:09:08,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:09:08,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 02:09:08,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-07-20 02:09:08,298 INFO L87 Difference]: Start difference. First operand 1090 states and 1250 transitions. Second operand 25 states. [2020-07-20 02:09:19,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:09:19,091 INFO L93 Difference]: Finished difference Result 1138 states and 1308 transitions. [2020-07-20 02:09:19,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 02:09:19,112 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 181 [2020-07-20 02:09:19,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:09:19,114 INFO L225 Difference]: With dead ends: 1138 [2020-07-20 02:09:19,114 INFO L226 Difference]: Without dead ends: 1136 [2020-07-20 02:09:19,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-07-20 02:09:19,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2020-07-20 02:09:19,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1126. [2020-07-20 02:09:19,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1126 states. [2020-07-20 02:09:19,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1295 transitions. [2020-07-20 02:09:19,150 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1295 transitions. Word has length 181 [2020-07-20 02:09:19,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:09:19,150 INFO L479 AbstractCegarLoop]: Abstraction has 1126 states and 1295 transitions. [2020-07-20 02:09:19,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 02:09:19,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1295 transitions. [2020-07-20 02:09:19,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-07-20 02:09:19,153 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:09:19,153 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:09:19,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-07-20 02:09:19,354 INFO L427 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:09:19,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:09:19,354 INFO L82 PathProgramCache]: Analyzing trace with hash 797183898, now seen corresponding path program 62 times [2020-07-20 02:09:19,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:09:19,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45338617] [2020-07-20 02:09:19,355 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:09:19,360 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:09:19,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075461741] [2020-07-20 02:09:19,360 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49b5b672 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:09:19,421 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49b5b672 issued 4 check-sat command(s) [2020-07-20 02:09:19,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:09:19,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 93 conjunts are in the unsatisfiable core [2020-07-20 02:09:19,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:09:19,756 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:20,024 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:20,327 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:20,680 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:21,070 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:21,505 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:21,959 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:22,436 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:22,959 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:23,546 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:24,142 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:24,773 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:25,422 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:26,116 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:26,815 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:27,566 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:28,337 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:29,151 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:30,002 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 02:09:31,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1604 backedges. 40 proven. 800 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2020-07-20 02:09:31,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45338617] [2020-07-20 02:09:31,304 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:09:31,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075461741] [2020-07-20 02:09:31,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:09:31,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-07-20 02:09:31,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316396554] [2020-07-20 02:09:31,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 02:09:31,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:09:31,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 02:09:31,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-07-20 02:09:31,314 INFO L87 Difference]: Start difference. First operand 1126 states and 1295 transitions. Second operand 25 states. [2020-07-20 02:09:41,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:09:41,729 INFO L93 Difference]: Finished difference Result 1146 states and 1317 transitions. [2020-07-20 02:09:41,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 02:09:41,729 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 181 [2020-07-20 02:09:41,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:09:41,732 INFO L225 Difference]: With dead ends: 1146 [2020-07-20 02:09:41,732 INFO L226 Difference]: Without dead ends: 1144 [2020-07-20 02:09:41,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-07-20 02:09:41,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2020-07-20 02:09:41,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 1134. [2020-07-20 02:09:41,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1134 states. [2020-07-20 02:09:41,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 1304 transitions. [2020-07-20 02:09:41,802 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 1304 transitions. Word has length 181 [2020-07-20 02:09:41,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:09:41,803 INFO L479 AbstractCegarLoop]: Abstraction has 1134 states and 1304 transitions. [2020-07-20 02:09:41,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 02:09:41,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 1304 transitions. [2020-07-20 02:09:41,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-20 02:09:41,806 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:09:41,806 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:09:42,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-07-20 02:09:42,020 INFO L427 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:09:42,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:09:42,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1774944229, now seen corresponding path program 21 times [2020-07-20 02:09:42,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:09:42,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455969823] [2020-07-20 02:09:42,021 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:09:42,024 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:09:42,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412698074] [2020-07-20 02:09:42,024 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@470cca44 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:09:42,122 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@470cca44 issued 4 check-sat command(s) [2020-07-20 02:09:42,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:09:42,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 97 conjunts are in the unsatisfiable core [2020-07-20 02:09:42,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:09:42,496 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:42,783 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:43,126 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:43,492 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:43,899 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:44,358 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:44,814 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:45,315 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:45,839 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:46,415 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:47,019 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:47,662 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:48,353 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:49,067 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:49,828 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:50,630 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:51,481 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:52,377 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:53,284 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:54,269 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 02:09:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1768 backedges. 42 proven. 882 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2020-07-20 02:09:55,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455969823] [2020-07-20 02:09:55,795 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:09:55,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412698074] [2020-07-20 02:09:55,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:09:55,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-07-20 02:09:55,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859429490] [2020-07-20 02:09:55,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 02:09:55,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:09:55,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 02:09:55,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-07-20 02:09:55,796 INFO L87 Difference]: Start difference. First operand 1134 states and 1304 transitions. Second operand 26 states. [2020-07-20 02:10:07,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:10:07,321 INFO L93 Difference]: Finished difference Result 1162 states and 1335 transitions. [2020-07-20 02:10:07,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 02:10:07,323 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 189 [2020-07-20 02:10:07,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:10:07,326 INFO L225 Difference]: With dead ends: 1162 [2020-07-20 02:10:07,327 INFO L226 Difference]: Without dead ends: 1144 [2020-07-20 02:10:07,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2020-07-20 02:10:07,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2020-07-20 02:10:07,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 1142. [2020-07-20 02:10:07,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1142 states. [2020-07-20 02:10:07,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 1312 transitions. [2020-07-20 02:10:07,396 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 1312 transitions. Word has length 189 [2020-07-20 02:10:07,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:10:07,396 INFO L479 AbstractCegarLoop]: Abstraction has 1142 states and 1312 transitions. [2020-07-20 02:10:07,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 02:10:07,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 1312 transitions. [2020-07-20 02:10:07,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-20 02:10:07,400 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:10:07,400 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 14, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:10:07,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:10:07,614 INFO L427 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:10:07,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:10:07,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1663563593, now seen corresponding path program 63 times [2020-07-20 02:10:07,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:10:07,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12491623] [2020-07-20 02:10:07,616 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:10:07,620 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:10:07,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814623623] [2020-07-20 02:10:07,620 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@61eae0ae No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:10:07,691 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@61eae0ae issued 4 check-sat command(s) [2020-07-20 02:10:07,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:10:07,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 73 conjunts are in the unsatisfiable core [2020-07-20 02:10:07,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:10:08,072 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:08,380 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:08,817 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:10:09,312 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:10:10,066 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:10:10,897 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:10:11,859 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:10:12,645 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:13,514 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:14,425 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:15,722 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:10:17,258 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:10:18,766 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:10:20,321 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:10:21,992 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:10:23,738 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:10:25,673 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:10:27,626 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:10:29,838 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:10:32,097 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 02:10:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1768 backedges. 42 proven. 882 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2020-07-20 02:10:35,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12491623] [2020-07-20 02:10:35,491 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:10:35,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814623623] [2020-07-20 02:10:35,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:10:35,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-07-20 02:10:35,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802331819] [2020-07-20 02:10:35,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 02:10:35,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:10:35,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 02:10:35,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-07-20 02:10:35,492 INFO L87 Difference]: Start difference. First operand 1142 states and 1312 transitions. Second operand 26 states. [2020-07-20 02:10:49,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:10:49,142 INFO L93 Difference]: Finished difference Result 1162 states and 1334 transitions. [2020-07-20 02:10:49,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 02:10:49,165 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 189 [2020-07-20 02:10:49,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:10:49,167 INFO L225 Difference]: With dead ends: 1162 [2020-07-20 02:10:49,167 INFO L226 Difference]: Without dead ends: 1160 [2020-07-20 02:10:49,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2020-07-20 02:10:49,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2020-07-20 02:10:49,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1158. [2020-07-20 02:10:49,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1158 states. [2020-07-20 02:10:49,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1330 transitions. [2020-07-20 02:10:49,211 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1330 transitions. Word has length 189 [2020-07-20 02:10:49,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:10:49,211 INFO L479 AbstractCegarLoop]: Abstraction has 1158 states and 1330 transitions. [2020-07-20 02:10:49,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 02:10:49,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1330 transitions. [2020-07-20 02:10:49,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-20 02:10:49,215 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:10:49,215 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 18, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:10:49,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:10:49,416 INFO L427 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:10:49,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:10:49,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1344917569, now seen corresponding path program 64 times [2020-07-20 02:10:49,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:10:49,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316168713] [2020-07-20 02:10:49,418 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:10:49,422 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:10:49,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450757578] [2020-07-20 02:10:49,422 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@152c15ef No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:10:49,490 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@152c15ef issued 4 check-sat command(s) [2020-07-20 02:10:49,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:10:49,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 73 conjunts are in the unsatisfiable core [2020-07-20 02:10:49,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:10:49,893 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:50,198 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:50,564 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:50,987 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:51,451 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:51,975 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:52,649 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:10:53,429 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:10:54,253 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:10:55,142 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:10:56,093 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:10:57,172 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:10:58,734 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:11:00,364 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:11:01,992 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:11:03,721 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:11:05,532 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:11:07,493 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:11:09,626 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:11:11,930 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 02:11:15,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1768 backedges. 42 proven. 882 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2020-07-20 02:11:15,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316168713] [2020-07-20 02:11:15,092 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:11:15,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450757578] [2020-07-20 02:11:15,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:11:15,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-07-20 02:11:15,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159904410] [2020-07-20 02:11:15,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 02:11:15,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:11:15,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 02:11:15,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-07-20 02:11:15,094 INFO L87 Difference]: Start difference. First operand 1158 states and 1330 transitions. Second operand 26 states. [2020-07-20 02:11:29,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:11:29,255 INFO L93 Difference]: Finished difference Result 1194 states and 1372 transitions. [2020-07-20 02:11:29,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 02:11:29,280 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 189 [2020-07-20 02:11:29,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:11:29,281 INFO L225 Difference]: With dead ends: 1194 [2020-07-20 02:11:29,281 INFO L226 Difference]: Without dead ends: 1192 [2020-07-20 02:11:29,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2020-07-20 02:11:29,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2020-07-20 02:11:29,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1190. [2020-07-20 02:11:29,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1190 states. [2020-07-20 02:11:29,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1368 transitions. [2020-07-20 02:11:29,327 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1368 transitions. Word has length 189 [2020-07-20 02:11:29,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:11:29,327 INFO L479 AbstractCegarLoop]: Abstraction has 1190 states and 1368 transitions. [2020-07-20 02:11:29,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 02:11:29,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1368 transitions. [2020-07-20 02:11:29,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-20 02:11:29,330 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:11:29,330 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 19, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:11:29,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:11:29,531 INFO L427 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:11:29,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:11:29,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1800689023, now seen corresponding path program 65 times [2020-07-20 02:11:29,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:11:29,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955190505] [2020-07-20 02:11:29,533 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:11:29,536 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:11:29,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146298551] [2020-07-20 02:11:29,536 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3d3689a1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:11:29,583 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3d3689a1 issued 1 check-sat command(s) [2020-07-20 02:11:29,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:11:29,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 02:11:29,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:11:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1768 backedges. 304 proven. 620 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2020-07-20 02:11:29,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955190505] [2020-07-20 02:11:29,960 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:11:29,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146298551] [2020-07-20 02:11:29,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:11:29,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-20 02:11:29,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119469737] [2020-07-20 02:11:29,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 02:11:29,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:11:29,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 02:11:29,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2020-07-20 02:11:29,962 INFO L87 Difference]: Start difference. First operand 1190 states and 1368 transitions. Second operand 23 states. [2020-07-20 02:11:31,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:11:31,546 INFO L93 Difference]: Finished difference Result 1294 states and 1498 transitions. [2020-07-20 02:11:31,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 02:11:31,555 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 189 [2020-07-20 02:11:31,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:11:31,557 INFO L225 Difference]: With dead ends: 1294 [2020-07-20 02:11:31,557 INFO L226 Difference]: Without dead ends: 1240 [2020-07-20 02:11:31,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 02:11:31,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2020-07-20 02:11:31,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1238. [2020-07-20 02:11:31,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1238 states. [2020-07-20 02:11:31,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 1429 transitions. [2020-07-20 02:11:31,640 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 1429 transitions. Word has length 189 [2020-07-20 02:11:31,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:11:31,640 INFO L479 AbstractCegarLoop]: Abstraction has 1238 states and 1429 transitions. [2020-07-20 02:11:31,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 02:11:31,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 1429 transitions. [2020-07-20 02:11:31,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-20 02:11:31,644 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:11:31,644 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 19, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:11:31,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:11:31,844 INFO L427 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:11:31,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:11:31,845 INFO L82 PathProgramCache]: Analyzing trace with hash 2140288895, now seen corresponding path program 66 times [2020-07-20 02:11:31,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:11:31,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847727735] [2020-07-20 02:11:31,846 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:11:31,849 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:11:31,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071624629] [2020-07-20 02:11:31,850 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4605b94f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:11:31,895 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4605b94f issued 1 check-sat command(s) [2020-07-20 02:11:31,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:11:31,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 02:11:31,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:11:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1768 backedges. 304 proven. 620 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2020-07-20 02:11:32,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847727735] [2020-07-20 02:11:32,255 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:11:32,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071624629] [2020-07-20 02:11:32,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:11:32,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-20 02:11:32,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975840627] [2020-07-20 02:11:32,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 02:11:32,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:11:32,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 02:11:32,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2020-07-20 02:11:32,256 INFO L87 Difference]: Start difference. First operand 1238 states and 1429 transitions. Second operand 23 states. [2020-07-20 02:11:33,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:11:33,538 INFO L93 Difference]: Finished difference Result 1290 states and 1489 transitions. [2020-07-20 02:11:33,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 02:11:33,546 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 189 [2020-07-20 02:11:33,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:11:33,549 INFO L225 Difference]: With dead ends: 1290 [2020-07-20 02:11:33,549 INFO L226 Difference]: Without dead ends: 1240 [2020-07-20 02:11:33,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 02:11:33,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2020-07-20 02:11:33,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1238. [2020-07-20 02:11:33,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1238 states. [2020-07-20 02:11:33,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 1428 transitions. [2020-07-20 02:11:33,655 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 1428 transitions. Word has length 189 [2020-07-20 02:11:33,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:11:33,656 INFO L479 AbstractCegarLoop]: Abstraction has 1238 states and 1428 transitions. [2020-07-20 02:11:33,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 02:11:33,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 1428 transitions. [2020-07-20 02:11:33,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-20 02:11:33,660 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:11:33,660 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:11:33,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:11:33,875 INFO L427 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:11:33,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:11:33,875 INFO L82 PathProgramCache]: Analyzing trace with hash 181714109, now seen corresponding path program 67 times [2020-07-20 02:11:33,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:11:33,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066843120] [2020-07-20 02:11:33,876 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:11:33,883 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:11:33,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373530377] [2020-07-20 02:11:33,884 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36d7eff0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:11:34,000 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36d7eff0 issued 4 check-sat command(s) [2020-07-20 02:11:34,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:11:34,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 97 conjunts are in the unsatisfiable core [2020-07-20 02:11:34,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:11:34,149 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:11:34,474 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:11:34,866 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:11:35,296 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:11:35,730 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:11:36,204 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:11:36,728 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:11:37,362 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:11:37,964 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:11:38,616 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:11:39,324 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:11:40,082 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:11:40,907 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:11:41,734 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:11:42,665 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:11:43,678 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:11:44,730 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:11:45,774 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:11:46,853 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:11:48,001 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:11:49,313 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 02:11:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1768 backedges. 42 proven. 882 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2020-07-20 02:11:51,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066843120] [2020-07-20 02:11:51,300 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:11:51,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373530377] [2020-07-20 02:11:51,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:11:51,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-07-20 02:11:51,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113799620] [2020-07-20 02:11:51,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 02:11:51,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:11:51,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 02:11:51,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-07-20 02:11:51,302 INFO L87 Difference]: Start difference. First operand 1238 states and 1428 transitions. Second operand 26 states. [2020-07-20 02:12:05,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:12:05,583 INFO L93 Difference]: Finished difference Result 1256 states and 1447 transitions. [2020-07-20 02:12:05,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 02:12:05,583 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 189 [2020-07-20 02:12:05,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:12:05,585 INFO L225 Difference]: With dead ends: 1256 [2020-07-20 02:12:05,585 INFO L226 Difference]: Without dead ends: 1254 [2020-07-20 02:12:05,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2020-07-20 02:12:05,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2020-07-20 02:12:05,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 1252. [2020-07-20 02:12:05,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1252 states. [2020-07-20 02:12:05,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 1443 transitions. [2020-07-20 02:12:05,627 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 1443 transitions. Word has length 189 [2020-07-20 02:12:05,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:12:05,627 INFO L479 AbstractCegarLoop]: Abstraction has 1252 states and 1443 transitions. [2020-07-20 02:12:05,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 02:12:05,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 1443 transitions. [2020-07-20 02:12:05,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-07-20 02:12:05,629 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:12:05,629 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:12:05,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:12:05,830 INFO L427 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:12:05,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:12:05,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1426252086, now seen corresponding path program 22 times [2020-07-20 02:12:05,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:12:05,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329405504] [2020-07-20 02:12:05,831 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:12:05,836 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:12:05,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [254979636] [2020-07-20 02:12:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5ed80ba5 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:12:05,948 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5ed80ba5 issued 4 check-sat command(s) [2020-07-20 02:12:05,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:12:05,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 101 conjunts are in the unsatisfiable core [2020-07-20 02:12:05,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:12:06,077 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:12:06,385 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:06,741 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:07,137 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:07,577 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:08,066 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:08,623 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:09,201 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:09,842 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:10,514 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:11,178 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:11,902 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:12,658 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:13,460 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:14,295 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:15,240 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:16,208 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:17,301 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:18,457 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:19,596 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:20,747 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:21,973 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 02:12:23,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 44 proven. 968 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2020-07-20 02:12:23,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329405504] [2020-07-20 02:12:23,955 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:12:23,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254979636] [2020-07-20 02:12:23,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:12:23,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-07-20 02:12:23,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223641104] [2020-07-20 02:12:23,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 02:12:23,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:12:23,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 02:12:23,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-07-20 02:12:23,956 INFO L87 Difference]: Start difference. First operand 1252 states and 1443 transitions. Second operand 27 states. [2020-07-20 02:12:38,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:12:38,400 INFO L93 Difference]: Finished difference Result 1280 states and 1474 transitions. [2020-07-20 02:12:38,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-20 02:12:38,401 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 197 [2020-07-20 02:12:38,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:12:38,403 INFO L225 Difference]: With dead ends: 1280 [2020-07-20 02:12:38,403 INFO L226 Difference]: Without dead ends: 1262 [2020-07-20 02:12:38,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2020-07-20 02:12:38,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2020-07-20 02:12:38,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 1260. [2020-07-20 02:12:38,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1260 states. [2020-07-20 02:12:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 1451 transitions. [2020-07-20 02:12:38,454 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 1451 transitions. Word has length 197 [2020-07-20 02:12:38,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:12:38,454 INFO L479 AbstractCegarLoop]: Abstraction has 1260 states and 1451 transitions. [2020-07-20 02:12:38,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 02:12:38,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 1451 transitions. [2020-07-20 02:12:38,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-07-20 02:12:38,456 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:12:38,456 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:12:38,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:12:38,657 INFO L427 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:12:38,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:12:38,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1875480180, now seen corresponding path program 68 times [2020-07-20 02:12:38,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:12:38,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842898347] [2020-07-20 02:12:38,658 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 02:12:38,662 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:12:38,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13745858] [2020-07-20 02:12:38,662 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16ab318c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:12:38,750 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16ab318c issued 4 check-sat command(s) [2020-07-20 02:12:38,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:12:38,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 81 conjunts are in the unsatisfiable core [2020-07-20 02:12:38,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:12:38,885 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:39,197 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:39,638 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:12:40,142 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:40,758 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:41,685 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:12:42,773 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:12:43,972 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:12:45,279 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:12:46,685 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:12:48,209 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:12:49,817 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:12:51,557 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:12:53,511 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:12:55,677 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:12:57,968 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:13:00,191 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:13:02,518 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:13:04,950 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:13:07,623 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:13:10,524 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:13:13,357 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 02:13:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 44 proven. 968 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2020-07-20 02:13:17,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842898347] [2020-07-20 02:13:17,845 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:13:17,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13745858] [2020-07-20 02:13:17,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:13:17,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-07-20 02:13:17,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348112556] [2020-07-20 02:13:17,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 02:13:17,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:13:17,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 02:13:17,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-07-20 02:13:17,846 INFO L87 Difference]: Start difference. First operand 1260 states and 1451 transitions. Second operand 27 states.