/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/sqrt1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 02:01:27,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 02:01:27,996 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 02:01:28,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 02:01:28,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 02:01:28,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 02:01:28,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 02:01:28,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 02:01:28,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 02:01:28,040 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 02:01:28,041 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 02:01:28,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 02:01:28,044 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 02:01:28,046 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 02:01:28,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 02:01:28,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 02:01:28,054 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 02:01:28,058 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 02:01:28,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 02:01:28,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 02:01:28,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 02:01:28,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 02:01:28,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 02:01:28,077 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 02:01:28,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 02:01:28,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 02:01:28,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 02:01:28,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 02:01:28,098 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 02:01:28,134 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 02:01:28,134 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 02:01:28,136 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 02:01:28,142 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 02:01:28,142 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 02:01:28,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 02:01:28,143 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 02:01:28,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 02:01:28,143 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 02:01:28,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 02:01:28,146 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 02:01:28,146 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 02:01:28,146 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 02:01:28,146 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 02:01:28,146 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 02:01:28,147 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 02:01:28,147 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 02:01:28,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 02:01:28,147 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 02:01:28,148 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 02:01:28,148 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 02:01:28,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 02:01:28,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 02:01:28,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 02:01:28,149 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 02:01:28,149 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 02:01:28,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 02:01:28,149 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 02:01:28,149 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 02:01:28,150 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 02:01:28,437 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 02:01:28,452 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 02:01:28,456 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 02:01:28,457 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 02:01:28,460 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 02:01:28,461 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/sqrt1.c [2020-07-20 02:01:28,536 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dda81e06/65854256b74e4431aad0d28349746331/FLAG300d7a9d1 [2020-07-20 02:01:29,062 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 02:01:29,063 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/sqrt1.c [2020-07-20 02:01:29,074 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dda81e06/65854256b74e4431aad0d28349746331/FLAG300d7a9d1 [2020-07-20 02:01:29,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dda81e06/65854256b74e4431aad0d28349746331 [2020-07-20 02:01:29,420 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 02:01:29,424 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 02:01:29,425 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 02:01:29,425 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 02:01:29,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 02:01:29,431 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:01:29" (1/1) ... [2020-07-20 02:01:29,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b31d18b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:01:29, skipping insertion in model container [2020-07-20 02:01:29,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:01:29" (1/1) ... [2020-07-20 02:01:29,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 02:01:29,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 02:01:29,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 02:01:29,645 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 02:01:29,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 02:01:29,683 INFO L208 MainTranslator]: Completed translation [2020-07-20 02:01:29,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:01:29 WrapperNode [2020-07-20 02:01:29,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 02:01:29,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 02:01:29,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 02:01:29,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 02:01:29,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:01:29" (1/1) ... [2020-07-20 02:01:29,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:01:29" (1/1) ... [2020-07-20 02:01:29,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:01:29" (1/1) ... [2020-07-20 02:01:29,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:01:29" (1/1) ... [2020-07-20 02:01:29,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:01:29" (1/1) ... [2020-07-20 02:01:29,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:01:29" (1/1) ... [2020-07-20 02:01:29,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:01:29" (1/1) ... [2020-07-20 02:01:29,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 02:01:29,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 02:01:29,723 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 02:01:29,723 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 02:01:29,724 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:01:29" (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 02:01:29,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 02:01:29,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 02:01:29,888 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 02:01:29,888 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 02:01:29,888 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 02:01:29,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 02:01:29,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 02:01:29,888 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 02:01:29,889 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 02:01:29,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 02:01:29,889 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 02:01:29,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 02:01:29,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 02:01:30,110 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 02:01:30,110 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 02:01:30,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:01:30 BoogieIcfgContainer [2020-07-20 02:01:30,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 02:01:30,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 02:01:30,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 02:01:30,119 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 02:01:30,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:01:29" (1/3) ... [2020-07-20 02:01:30,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e8d3484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:01:30, skipping insertion in model container [2020-07-20 02:01:30,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:01:29" (2/3) ... [2020-07-20 02:01:30,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e8d3484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:01:30, skipping insertion in model container [2020-07-20 02:01:30,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:01:30" (3/3) ... [2020-07-20 02:01:30,123 INFO L109 eAbstractionObserver]: Analyzing ICFG sqrt1.c [2020-07-20 02:01:30,136 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 02:01:30,144 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 02:01:30,160 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 02:01:30,186 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 02:01:30,186 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 02:01:30,187 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 02:01:30,187 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 02:01:30,187 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 02:01:30,187 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 02:01:30,187 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 02:01:30,187 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 02:01:30,205 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-20 02:01:30,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 02:01:30,212 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:30,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:30,213 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:30,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:30,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1080899301, now seen corresponding path program 1 times [2020-07-20 02:01:30,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:30,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368705291] [2020-07-20 02:01:30,228 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:01:30,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:01:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:01:30,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368705291] [2020-07-20 02:01:30,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:01:30,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 02:01:30,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37528919] [2020-07-20 02:01:30,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 02:01:30,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:30,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 02:01:30,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 02:01:30,371 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-07-20 02:01:30,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:30,399 INFO L93 Difference]: Finished difference Result 43 states and 65 transitions. [2020-07-20 02:01:30,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 02:01:30,401 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 02:01:30,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:30,411 INFO L225 Difference]: With dead ends: 43 [2020-07-20 02:01:30,412 INFO L226 Difference]: Without dead ends: 19 [2020-07-20 02:01:30,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 02:01:30,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-20 02:01:30,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-20 02:01:30,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-20 02:01:30,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-07-20 02:01:30,471 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2020-07-20 02:01:30,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:30,472 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-07-20 02:01:30,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 02:01:30,472 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-07-20 02:01:30,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 02:01:30,473 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:30,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:30,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 02:01:30,474 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:30,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:30,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1082567597, now seen corresponding path program 1 times [2020-07-20 02:01:30,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:30,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459193182] [2020-07-20 02:01:30,476 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:01:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:01:30,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:01:30,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459193182] [2020-07-20 02:01:30,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:01:30,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:01:30,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820992452] [2020-07-20 02:01:30,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:01:30,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:30,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:01:30,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:01:30,633 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 5 states. [2020-07-20 02:01:30,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:30,808 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-07-20 02:01:30,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 02:01:30,809 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-20 02:01:30,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:30,811 INFO L225 Difference]: With dead ends: 25 [2020-07-20 02:01:30,811 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 02:01:30,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:01:30,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 02:01:30,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-20 02:01:30,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 02:01:30,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-07-20 02:01:30,826 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2020-07-20 02:01:30,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:30,826 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-07-20 02:01:30,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 02:01:30,826 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-07-20 02:01:30,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 02:01:30,827 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:30,828 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:30,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 02:01:30,828 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:30,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:30,829 INFO L82 PathProgramCache]: Analyzing trace with hash 725386554, now seen corresponding path program 1 times [2020-07-20 02:01:30,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:30,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929741856] [2020-07-20 02:01:30,830 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:30,841 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:30,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628956231] [2020-07-20 02:01:30,842 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2db5155b 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 02:01:30,893 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2db5155b issued 4 check-sat command(s) [2020-07-20 02:01:30,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:30,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 02:01:30,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:01:30,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929741856] [2020-07-20 02:01:30,991 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:30,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628956231] [2020-07-20 02:01:30,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:01:30,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:01:30,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224611441] [2020-07-20 02:01:30,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:01:30,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:30,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:01:30,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:01:30,994 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-07-20 02:01:31,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:31,101 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-07-20 02:01:31,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 02:01:31,102 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-20 02:01:31,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:31,104 INFO L225 Difference]: With dead ends: 37 [2020-07-20 02:01:31,104 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 02:01:31,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:01:31,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 02:01:31,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-07-20 02:01:31,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 02:01:31,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-07-20 02:01:31,119 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 15 [2020-07-20 02:01:31,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:31,119 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-07-20 02:01:31,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 02:01:31,120 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-07-20 02:01:31,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 02:01:31,120 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:31,121 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:31,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 02:01:31,335 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:31,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:31,336 INFO L82 PathProgramCache]: Analyzing trace with hash -436292723, now seen corresponding path program 1 times [2020-07-20 02:01:31,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:31,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311744747] [2020-07-20 02:01:31,337 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:31,349 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:31,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170189552] [2020-07-20 02:01:31,351 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75e05594 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:31,380 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75e05594 issued 4 check-sat command(s) [2020-07-20 02:01:31,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:31,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 02:01:31,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:31,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 02:01:31,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311744747] [2020-07-20 02:01:31,421 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:31,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170189552] [2020-07-20 02:01:31,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:01:31,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:01:31,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809972862] [2020-07-20 02:01:31,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:01:31,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:31,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:01:31,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:01:31,424 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 5 states. [2020-07-20 02:01:31,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:31,515 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2020-07-20 02:01:31,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 02:01:31,518 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-20 02:01:31,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:31,519 INFO L225 Difference]: With dead ends: 41 [2020-07-20 02:01:31,519 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 02:01:31,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:01:31,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 02:01:31,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 02:01:31,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 02:01:31,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-07-20 02:01:31,535 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 20 [2020-07-20 02:01:31,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:31,536 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-07-20 02:01:31,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 02:01:31,536 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-07-20 02:01:31,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-20 02:01:31,538 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:31,538 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:31,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:31,740 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:31,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:31,741 INFO L82 PathProgramCache]: Analyzing trace with hash -2135406385, now seen corresponding path program 1 times [2020-07-20 02:01:31,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:31,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840972853] [2020-07-20 02:01:31,743 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:31,753 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:31,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [9903536] [2020-07-20 02:01:31,754 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@d523ece 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 02:01:31,792 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@d523ece issued 4 check-sat command(s) [2020-07-20 02:01:31,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:31,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 02:01:31,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-20 02:01:31,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840972853] [2020-07-20 02:01:31,901 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:31,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9903536] [2020-07-20 02:01:31,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:31,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-20 02:01:31,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918376970] [2020-07-20 02:01:31,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 02:01:31,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:31,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 02:01:31,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:01:31,906 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 6 states. [2020-07-20 02:01:32,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:32,057 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-07-20 02:01:32,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 02:01:32,059 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-07-20 02:01:32,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:32,061 INFO L225 Difference]: With dead ends: 54 [2020-07-20 02:01:32,062 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 02:01:32,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 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 02:01:32,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 02:01:32,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-07-20 02:01:32,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 02:01:32,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-07-20 02:01:32,091 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 32 [2020-07-20 02:01:32,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:32,091 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-07-20 02:01:32,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 02:01:32,094 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-07-20 02:01:32,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 02:01:32,095 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:32,096 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:32,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:32,310 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:32,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:32,311 INFO L82 PathProgramCache]: Analyzing trace with hash -2069437160, now seen corresponding path program 2 times [2020-07-20 02:01:32,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:32,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065010367] [2020-07-20 02:01:32,313 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:32,325 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:32,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513513022] [2020-07-20 02:01:32,326 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@175ddeab No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:32,389 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@175ddeab issued 4 check-sat command(s) [2020-07-20 02:01:32,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:32,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 02:01:32,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 02:01:32,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065010367] [2020-07-20 02:01:32,444 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:32,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513513022] [2020-07-20 02:01:32,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:32,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-20 02:01:32,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231962559] [2020-07-20 02:01:32,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 02:01:32,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:32,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 02:01:32,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:01:32,446 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 6 states. [2020-07-20 02:01:32,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:32,549 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-07-20 02:01:32,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 02:01:32,550 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-07-20 02:01:32,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:32,551 INFO L225 Difference]: With dead ends: 58 [2020-07-20 02:01:32,551 INFO L226 Difference]: Without dead ends: 53 [2020-07-20 02:01:32,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 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 02:01:32,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-20 02:01:32,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-07-20 02:01:32,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-20 02:01:32,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-07-20 02:01:32,563 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 37 [2020-07-20 02:01:32,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:32,564 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-07-20 02:01:32,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 02:01:32,564 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-07-20 02:01:32,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-20 02:01:32,566 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:32,566 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:32,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:32,781 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:32,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:32,781 INFO L82 PathProgramCache]: Analyzing trace with hash -121404966, now seen corresponding path program 3 times [2020-07-20 02:01:32,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:32,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305516802] [2020-07-20 02:01:32,782 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:32,791 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:32,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438317473] [2020-07-20 02:01:32,792 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@306f6407 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 02:01:32,835 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@306f6407 issued 4 check-sat command(s) [2020-07-20 02:01:32,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:32,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 02:01:32,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-20 02:01:32,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305516802] [2020-07-20 02:01:32,922 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:32,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438317473] [2020-07-20 02:01:32,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:32,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-20 02:01:32,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538233891] [2020-07-20 02:01:32,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 02:01:32,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:32,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 02:01:32,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 02:01:32,925 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 7 states. [2020-07-20 02:01:33,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:33,087 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2020-07-20 02:01:33,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 02:01:33,088 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2020-07-20 02:01:33,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:33,090 INFO L225 Difference]: With dead ends: 71 [2020-07-20 02:01:33,090 INFO L226 Difference]: Without dead ends: 69 [2020-07-20 02:01:33,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 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 02:01:33,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-20 02:01:33,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-07-20 02:01:33,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-20 02:01:33,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2020-07-20 02:01:33,104 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 49 [2020-07-20 02:01:33,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:33,105 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2020-07-20 02:01:33,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 02:01:33,105 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2020-07-20 02:01:33,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 02:01:33,107 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:33,107 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:33,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-20 02:01:33,321 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:33,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:33,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1300456723, now seen corresponding path program 4 times [2020-07-20 02:01:33,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:33,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010766823] [2020-07-20 02:01:33,323 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:33,331 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:33,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066193528] [2020-07-20 02:01:33,332 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7c511642 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:33,380 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7c511642 issued 4 check-sat command(s) [2020-07-20 02:01:33,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:33,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 02:01:33,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:33,455 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-07-20 02:01:33,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010766823] [2020-07-20 02:01:33,456 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:33,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066193528] [2020-07-20 02:01:33,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:33,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-20 02:01:33,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125946446] [2020-07-20 02:01:33,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 02:01:33,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:33,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 02:01:33,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 02:01:33,458 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 7 states. [2020-07-20 02:01:33,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:33,597 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2020-07-20 02:01:33,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 02:01:33,598 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-07-20 02:01:33,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:33,600 INFO L225 Difference]: With dead ends: 75 [2020-07-20 02:01:33,600 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 02:01:33,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 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 02:01:33,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 02:01:33,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-07-20 02:01:33,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 02:01:33,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2020-07-20 02:01:33,630 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 54 [2020-07-20 02:01:33,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:33,632 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2020-07-20 02:01:33,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 02:01:33,633 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2020-07-20 02:01:33,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-20 02:01:33,636 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:33,637 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:33,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:33,838 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:33,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:33,839 INFO L82 PathProgramCache]: Analyzing trace with hash 632692783, now seen corresponding path program 5 times [2020-07-20 02:01:33,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:33,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579298856] [2020-07-20 02:01:33,841 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:33,854 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:33,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081906535] [2020-07-20 02:01:33,854 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@348bf279 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 02:01:33,910 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@348bf279 issued 4 check-sat command(s) [2020-07-20 02:01:33,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:33,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 02:01:33,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 20 proven. 24 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-07-20 02:01:34,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579298856] [2020-07-20 02:01:34,003 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:34,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081906535] [2020-07-20 02:01:34,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:34,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 02:01:34,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818784948] [2020-07-20 02:01:34,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 02:01:34,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:34,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 02:01:34,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-20 02:01:34,006 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand 8 states. [2020-07-20 02:01:34,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:34,218 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2020-07-20 02:01:34,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 02:01:34,218 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-07-20 02:01:34,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:34,220 INFO L225 Difference]: With dead ends: 88 [2020-07-20 02:01:34,220 INFO L226 Difference]: Without dead ends: 86 [2020-07-20 02:01:34,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-20 02:01:34,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-20 02:01:34,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-07-20 02:01:34,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-20 02:01:34,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-07-20 02:01:34,256 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 66 [2020-07-20 02:01:34,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:34,257 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-07-20 02:01:34,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 02:01:34,257 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-07-20 02:01:34,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-07-20 02:01:34,259 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:34,259 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:34,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:34,474 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:34,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:34,474 INFO L82 PathProgramCache]: Analyzing trace with hash -74929736, now seen corresponding path program 6 times [2020-07-20 02:01:34,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:34,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474316905] [2020-07-20 02:01:34,475 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:34,483 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:34,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116277053] [2020-07-20 02:01:34,484 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f441594 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:34,532 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f441594 issued 4 check-sat command(s) [2020-07-20 02:01:34,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:34,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 02:01:34,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:34,633 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-20 02:01:34,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474316905] [2020-07-20 02:01:34,634 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:34,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116277053] [2020-07-20 02:01:34,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:34,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 02:01:34,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506150659] [2020-07-20 02:01:34,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 02:01:34,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:34,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 02:01:34,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-20 02:01:34,636 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 8 states. [2020-07-20 02:01:34,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:34,822 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2020-07-20 02:01:34,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 02:01:34,822 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-07-20 02:01:34,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:34,824 INFO L225 Difference]: With dead ends: 92 [2020-07-20 02:01:34,824 INFO L226 Difference]: Without dead ends: 87 [2020-07-20 02:01:34,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-20 02:01:34,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-20 02:01:34,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-07-20 02:01:34,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-20 02:01:34,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2020-07-20 02:01:34,836 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 71 [2020-07-20 02:01:34,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:34,837 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2020-07-20 02:01:34,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 02:01:34,837 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2020-07-20 02:01:34,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-20 02:01:34,838 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:34,838 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:35,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-20 02:01:35,054 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:35,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:35,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1996269958, now seen corresponding path program 7 times [2020-07-20 02:01:35,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:35,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817281062] [2020-07-20 02:01:35,055 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:35,063 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:35,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1507916527] [2020-07-20 02:01:35,063 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4455df92 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 02:01:35,115 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4455df92 issued 4 check-sat command(s) [2020-07-20 02:01:35,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:35,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-20 02:01:35,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:35,285 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 26 proven. 42 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-07-20 02:01:35,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817281062] [2020-07-20 02:01:35,286 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:35,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507916527] [2020-07-20 02:01:35,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:35,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 02:01:35,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448868828] [2020-07-20 02:01:35,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 02:01:35,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:35,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 02:01:35,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 02:01:35,288 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand 9 states. [2020-07-20 02:01:35,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:35,534 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2020-07-20 02:01:35,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 02:01:35,536 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-07-20 02:01:35,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:35,539 INFO L225 Difference]: With dead ends: 105 [2020-07-20 02:01:35,539 INFO L226 Difference]: Without dead ends: 103 [2020-07-20 02:01:35,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 75 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 02:01:35,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-20 02:01:35,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-07-20 02:01:35,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-20 02:01:35,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2020-07-20 02:01:35,557 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 83 [2020-07-20 02:01:35,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:35,559 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2020-07-20 02:01:35,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 02:01:35,560 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2020-07-20 02:01:35,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-07-20 02:01:35,564 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:35,564 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:35,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:35,768 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:35,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:35,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1174973005, now seen corresponding path program 8 times [2020-07-20 02:01:35,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:35,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123862100] [2020-07-20 02:01:35,770 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:35,779 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:35,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505253970] [2020-07-20 02:01:35,783 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6c487579 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:35,850 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6c487579 issued 4 check-sat command(s) [2020-07-20 02:01:35,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:35,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 02:01:35,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 46 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-20 02:01:35,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123862100] [2020-07-20 02:01:35,981 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:35,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505253970] [2020-07-20 02:01:35,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:35,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 02:01:35,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075723962] [2020-07-20 02:01:35,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 02:01:35,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:35,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 02:01:35,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 02:01:35,984 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand 9 states. [2020-07-20 02:01:36,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:36,178 INFO L93 Difference]: Finished difference Result 109 states and 117 transitions. [2020-07-20 02:01:36,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 02:01:36,179 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2020-07-20 02:01:36,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:36,181 INFO L225 Difference]: With dead ends: 109 [2020-07-20 02:01:36,181 INFO L226 Difference]: Without dead ends: 104 [2020-07-20 02:01:36,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-20 02:01:36,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-07-20 02:01:36,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-07-20 02:01:36,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-07-20 02:01:36,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2020-07-20 02:01:36,205 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 88 [2020-07-20 02:01:36,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:36,211 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2020-07-20 02:01:36,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 02:01:36,211 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2020-07-20 02:01:36,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-20 02:01:36,213 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:36,213 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:36,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:36,424 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:36,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:36,424 INFO L82 PathProgramCache]: Analyzing trace with hash -440000625, now seen corresponding path program 9 times [2020-07-20 02:01:36,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:36,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722929066] [2020-07-20 02:01:36,426 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:36,433 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:36,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1886235694] [2020-07-20 02:01:36,434 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7c707ed7 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 02:01:36,496 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7c707ed7 issued 4 check-sat command(s) [2020-07-20 02:01:36,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:36,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-20 02:01:36,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 32 proven. 65 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2020-07-20 02:01:36,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722929066] [2020-07-20 02:01:36,648 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:36,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886235694] [2020-07-20 02:01:36,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:36,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-20 02:01:36,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713680748] [2020-07-20 02:01:36,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 02:01:36,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:36,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 02:01:36,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-07-20 02:01:36,650 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand 10 states. [2020-07-20 02:01:36,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:36,958 INFO L93 Difference]: Finished difference Result 122 states and 131 transitions. [2020-07-20 02:01:36,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 02:01:36,959 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 100 [2020-07-20 02:01:36,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:36,961 INFO L225 Difference]: With dead ends: 122 [2020-07-20 02:01:36,961 INFO L226 Difference]: Without dead ends: 120 [2020-07-20 02:01:36,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 91 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 02:01:36,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-07-20 02:01:36,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-07-20 02:01:36,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-07-20 02:01:36,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 128 transitions. [2020-07-20 02:01:36,973 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 128 transitions. Word has length 100 [2020-07-20 02:01:36,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:36,974 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 128 transitions. [2020-07-20 02:01:36,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 02:01:36,974 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 128 transitions. [2020-07-20 02:01:36,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-07-20 02:01:36,975 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:36,975 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:37,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-20 02:01:37,189 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:37,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:37,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1267644840, now seen corresponding path program 10 times [2020-07-20 02:01:37,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:37,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139154833] [2020-07-20 02:01:37,191 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:37,199 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:37,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [507962455] [2020-07-20 02:01:37,199 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36e9d4ee No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:37,260 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36e9d4ee issued 4 check-sat command(s) [2020-07-20 02:01:37,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:37,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 02:01:37,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 34 proven. 70 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-07-20 02:01:37,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139154833] [2020-07-20 02:01:37,404 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:37,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507962455] [2020-07-20 02:01:37,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:37,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-20 02:01:37,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440994933] [2020-07-20 02:01:37,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 02:01:37,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:37,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 02:01:37,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-07-20 02:01:37,406 INFO L87 Difference]: Start difference. First operand 119 states and 128 transitions. Second operand 10 states. [2020-07-20 02:01:37,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:37,719 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2020-07-20 02:01:37,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 02:01:37,719 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 105 [2020-07-20 02:01:37,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:37,721 INFO L225 Difference]: With dead ends: 126 [2020-07-20 02:01:37,721 INFO L226 Difference]: Without dead ends: 121 [2020-07-20 02:01:37,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 96 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 02:01:37,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-07-20 02:01:37,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-07-20 02:01:37,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-20 02:01:37,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2020-07-20 02:01:37,747 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 105 [2020-07-20 02:01:37,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:37,748 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2020-07-20 02:01:37,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 02:01:37,748 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2020-07-20 02:01:37,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-20 02:01:37,749 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:37,749 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:37,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-20 02:01:37,950 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:37,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:37,951 INFO L82 PathProgramCache]: Analyzing trace with hash 264635162, now seen corresponding path program 11 times [2020-07-20 02:01:37,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:37,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201705702] [2020-07-20 02:01:37,951 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:37,957 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:37,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [149683004] [2020-07-20 02:01:37,958 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@10209384 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 02:01:38,029 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@10209384 issued 4 check-sat command(s) [2020-07-20 02:01:38,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:38,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 45 conjunts are in the unsatisfiable core [2020-07-20 02:01:38,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:38,236 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 38 proven. 93 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-07-20 02:01:38,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201705702] [2020-07-20 02:01:38,237 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:38,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149683004] [2020-07-20 02:01:38,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:38,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-20 02:01:38,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163786311] [2020-07-20 02:01:38,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 02:01:38,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:38,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 02:01:38,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-07-20 02:01:38,242 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand 11 states. [2020-07-20 02:01:38,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:38,617 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2020-07-20 02:01:38,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 02:01:38,617 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 117 [2020-07-20 02:01:38,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:38,619 INFO L225 Difference]: With dead ends: 139 [2020-07-20 02:01:38,619 INFO L226 Difference]: Without dead ends: 137 [2020-07-20 02:01:38,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-07-20 02:01:38,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-20 02:01:38,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-07-20 02:01:38,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-20 02:01:38,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 145 transitions. [2020-07-20 02:01:38,631 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 145 transitions. Word has length 117 [2020-07-20 02:01:38,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:38,632 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 145 transitions. [2020-07-20 02:01:38,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 02:01:38,632 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 145 transitions. [2020-07-20 02:01:38,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-20 02:01:38,634 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:38,634 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:38,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-20 02:01:38,847 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:38,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:38,848 INFO L82 PathProgramCache]: Analyzing trace with hash 991486381, now seen corresponding path program 12 times [2020-07-20 02:01:38,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:38,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314339296] [2020-07-20 02:01:38,849 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:38,855 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:38,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [55040204] [2020-07-20 02:01:38,856 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3f894cd6 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:38,918 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3f894cd6 issued 4 check-sat command(s) [2020-07-20 02:01:38,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:38,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-20 02:01:38,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:39,093 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 40 proven. 99 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2020-07-20 02:01:39,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314339296] [2020-07-20 02:01:39,094 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:39,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55040204] [2020-07-20 02:01:39,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:39,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-20 02:01:39,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688253720] [2020-07-20 02:01:39,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 02:01:39,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:39,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 02:01:39,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-07-20 02:01:39,096 INFO L87 Difference]: Start difference. First operand 136 states and 145 transitions. Second operand 11 states. [2020-07-20 02:01:39,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:39,434 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2020-07-20 02:01:39,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 02:01:39,434 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 122 [2020-07-20 02:01:39,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:39,436 INFO L225 Difference]: With dead ends: 143 [2020-07-20 02:01:39,436 INFO L226 Difference]: Without dead ends: 138 [2020-07-20 02:01:39,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-07-20 02:01:39,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-20 02:01:39,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-07-20 02:01:39,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-07-20 02:01:39,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2020-07-20 02:01:39,448 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 122 [2020-07-20 02:01:39,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:39,449 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2020-07-20 02:01:39,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 02:01:39,449 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2020-07-20 02:01:39,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-07-20 02:01:39,450 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:39,451 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:39,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:39,652 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:39,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:39,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1516127983, now seen corresponding path program 13 times [2020-07-20 02:01:39,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:39,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086577504] [2020-07-20 02:01:39,654 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:39,660 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:39,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306962683] [2020-07-20 02:01:39,661 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5a120ec1 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 02:01:39,733 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5a120ec1 issued 4 check-sat command(s) [2020-07-20 02:01:39,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:39,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-20 02:01:39,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:40,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 44 proven. 126 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2020-07-20 02:01:40,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086577504] [2020-07-20 02:01:40,004 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:40,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306962683] [2020-07-20 02:01:40,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:40,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-20 02:01:40,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483533619] [2020-07-20 02:01:40,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 02:01:40,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:40,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 02:01:40,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-07-20 02:01:40,010 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 12 states. [2020-07-20 02:01:40,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:40,524 INFO L93 Difference]: Finished difference Result 156 states and 165 transitions. [2020-07-20 02:01:40,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 02:01:40,525 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 134 [2020-07-20 02:01:40,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:40,527 INFO L225 Difference]: With dead ends: 156 [2020-07-20 02:01:40,527 INFO L226 Difference]: Without dead ends: 154 [2020-07-20 02:01:40,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 123 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 02:01:40,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-07-20 02:01:40,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-07-20 02:01:40,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-07-20 02:01:40,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 162 transitions. [2020-07-20 02:01:40,540 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 162 transitions. Word has length 134 [2020-07-20 02:01:40,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:40,540 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 162 transitions. [2020-07-20 02:01:40,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 02:01:40,541 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 162 transitions. [2020-07-20 02:01:40,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-07-20 02:01:40,542 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:40,542 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:40,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-20 02:01:40,758 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:40,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:40,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1884636424, now seen corresponding path program 14 times [2020-07-20 02:01:40,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:40,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155365679] [2020-07-20 02:01:40,760 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:40,766 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:40,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1246099824] [2020-07-20 02:01:40,767 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@17587c3b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:40,831 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@17587c3b issued 4 check-sat command(s) [2020-07-20 02:01:40,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:40,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-20 02:01:40,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:41,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 46 proven. 133 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-07-20 02:01:41,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155365679] [2020-07-20 02:01:41,032 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:41,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246099824] [2020-07-20 02:01:41,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:41,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-20 02:01:41,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147256958] [2020-07-20 02:01:41,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 02:01:41,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:41,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 02:01:41,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-07-20 02:01:41,034 INFO L87 Difference]: Start difference. First operand 153 states and 162 transitions. Second operand 12 states. [2020-07-20 02:01:41,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:41,486 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2020-07-20 02:01:41,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 02:01:41,487 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 139 [2020-07-20 02:01:41,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:41,488 INFO L225 Difference]: With dead ends: 160 [2020-07-20 02:01:41,489 INFO L226 Difference]: Without dead ends: 155 [2020-07-20 02:01:41,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-07-20 02:01:41,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-20 02:01:41,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2020-07-20 02:01:41,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-07-20 02:01:41,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 160 transitions. [2020-07-20 02:01:41,502 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 160 transitions. Word has length 139 [2020-07-20 02:01:41,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:41,502 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 160 transitions. [2020-07-20 02:01:41,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 02:01:41,502 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 160 transitions. [2020-07-20 02:01:41,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-07-20 02:01:41,504 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:41,504 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:41,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-20 02:01:41,718 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:41,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:41,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1314228154, now seen corresponding path program 15 times [2020-07-20 02:01:41,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:41,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111144577] [2020-07-20 02:01:41,719 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:41,725 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:41,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216964134] [2020-07-20 02:01:41,726 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56fae8dd 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 02:01:41,809 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56fae8dd issued 4 check-sat command(s) [2020-07-20 02:01:41,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:41,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-20 02:01:41,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1414 backedges. 50 proven. 164 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-07-20 02:01:42,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111144577] [2020-07-20 02:01:42,123 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:42,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216964134] [2020-07-20 02:01:42,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:42,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-20 02:01:42,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122097976] [2020-07-20 02:01:42,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 02:01:42,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:42,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 02:01:42,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-07-20 02:01:42,125 INFO L87 Difference]: Start difference. First operand 155 states and 160 transitions. Second operand 13 states. [2020-07-20 02:01:42,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:42,715 INFO L93 Difference]: Finished difference Result 173 states and 182 transitions. [2020-07-20 02:01:42,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 02:01:42,719 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 151 [2020-07-20 02:01:42,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:42,721 INFO L225 Difference]: With dead ends: 173 [2020-07-20 02:01:42,721 INFO L226 Difference]: Without dead ends: 171 [2020-07-20 02:01:42,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-07-20 02:01:42,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-07-20 02:01:42,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2020-07-20 02:01:42,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-07-20 02:01:42,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 179 transitions. [2020-07-20 02:01:42,741 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 179 transitions. Word has length 151 [2020-07-20 02:01:42,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:42,742 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 179 transitions. [2020-07-20 02:01:42,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 02:01:42,742 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 179 transitions. [2020-07-20 02:01:42,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-07-20 02:01:42,744 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:42,744 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:42,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:42,958 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:42,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:42,959 INFO L82 PathProgramCache]: Analyzing trace with hash 245580045, now seen corresponding path program 16 times [2020-07-20 02:01:42,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:42,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799824657] [2020-07-20 02:01:42,960 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:42,967 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:42,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737482692] [2020-07-20 02:01:42,968 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@569a6955 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:43,047 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@569a6955 issued 4 check-sat command(s) [2020-07-20 02:01:43,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:43,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-20 02:01:43,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1524 backedges. 52 proven. 172 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2020-07-20 02:01:43,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799824657] [2020-07-20 02:01:43,337 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:43,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737482692] [2020-07-20 02:01:43,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:43,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-20 02:01:43,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622741732] [2020-07-20 02:01:43,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 02:01:43,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:43,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 02:01:43,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-07-20 02:01:43,339 INFO L87 Difference]: Start difference. First operand 170 states and 179 transitions. Second operand 13 states. [2020-07-20 02:01:43,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:43,881 INFO L93 Difference]: Finished difference Result 177 states and 185 transitions. [2020-07-20 02:01:43,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 02:01:43,881 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 156 [2020-07-20 02:01:43,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:43,884 INFO L225 Difference]: With dead ends: 177 [2020-07-20 02:01:43,884 INFO L226 Difference]: Without dead ends: 172 [2020-07-20 02:01:43,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-07-20 02:01:43,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-07-20 02:01:43,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-07-20 02:01:43,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-07-20 02:01:43,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 177 transitions. [2020-07-20 02:01:43,896 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 177 transitions. Word has length 156 [2020-07-20 02:01:43,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:43,896 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 177 transitions. [2020-07-20 02:01:43,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 02:01:43,896 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 177 transitions. [2020-07-20 02:01:43,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-20 02:01:43,898 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:43,899 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:44,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:44,109 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:44,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:44,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1064605263, now seen corresponding path program 17 times [2020-07-20 02:01:44,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:44,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475174338] [2020-07-20 02:01:44,111 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:44,117 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:44,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698596122] [2020-07-20 02:01:44,118 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@23049f35 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 02:01:44,198 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@23049f35 issued 4 check-sat command(s) [2020-07-20 02:01:44,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:44,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-20 02:01:44,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1775 backedges. 56 proven. 207 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2020-07-20 02:01:44,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475174338] [2020-07-20 02:01:44,584 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:44,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698596122] [2020-07-20 02:01:44,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:44,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-20 02:01:44,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870015157] [2020-07-20 02:01:44,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 02:01:44,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:44,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 02:01:44,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-07-20 02:01:44,586 INFO L87 Difference]: Start difference. First operand 172 states and 177 transitions. Second operand 14 states. [2020-07-20 02:01:45,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:45,298 INFO L93 Difference]: Finished difference Result 190 states and 199 transitions. [2020-07-20 02:01:45,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 02:01:45,299 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 168 [2020-07-20 02:01:45,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:45,301 INFO L225 Difference]: With dead ends: 190 [2020-07-20 02:01:45,301 INFO L226 Difference]: Without dead ends: 188 [2020-07-20 02:01:45,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-07-20 02:01:45,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-07-20 02:01:45,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2020-07-20 02:01:45,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-07-20 02:01:45,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 196 transitions. [2020-07-20 02:01:45,312 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 196 transitions. Word has length 168 [2020-07-20 02:01:45,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:45,312 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 196 transitions. [2020-07-20 02:01:45,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 02:01:45,312 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 196 transitions. [2020-07-20 02:01:45,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-07-20 02:01:45,315 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:45,315 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:45,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:45,531 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:45,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:45,531 INFO L82 PathProgramCache]: Analyzing trace with hash -620820584, now seen corresponding path program 18 times [2020-07-20 02:01:45,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:45,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084462157] [2020-07-20 02:01:45,532 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:45,548 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:45,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461567193] [2020-07-20 02:01:45,548 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@59fe7184 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:45,655 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@59fe7184 issued 4 check-sat command(s) [2020-07-20 02:01:45,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:45,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 43 conjunts are in the unsatisfiable core [2020-07-20 02:01:45,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:45,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1898 backedges. 58 proven. 216 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2020-07-20 02:01:45,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084462157] [2020-07-20 02:01:45,985 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:45,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461567193] [2020-07-20 02:01:45,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:45,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-20 02:01:45,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446579399] [2020-07-20 02:01:45,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 02:01:45,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:45,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 02:01:45,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-07-20 02:01:45,987 INFO L87 Difference]: Start difference. First operand 187 states and 196 transitions. Second operand 14 states. [2020-07-20 02:01:46,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:46,651 INFO L93 Difference]: Finished difference Result 194 states and 202 transitions. [2020-07-20 02:01:46,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 02:01:46,654 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 173 [2020-07-20 02:01:46,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:46,656 INFO L225 Difference]: With dead ends: 194 [2020-07-20 02:01:46,656 INFO L226 Difference]: Without dead ends: 189 [2020-07-20 02:01:46,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-07-20 02:01:46,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-07-20 02:01:46,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2020-07-20 02:01:46,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-07-20 02:01:46,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 194 transitions. [2020-07-20 02:01:46,669 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 194 transitions. Word has length 173 [2020-07-20 02:01:46,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:46,669 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 194 transitions. [2020-07-20 02:01:46,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 02:01:46,670 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 194 transitions. [2020-07-20 02:01:46,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-07-20 02:01:46,672 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:46,672 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:46,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-07-20 02:01:46,887 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:46,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:46,888 INFO L82 PathProgramCache]: Analyzing trace with hash 863757402, now seen corresponding path program 19 times [2020-07-20 02:01:46,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:46,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956616125] [2020-07-20 02:01:46,889 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:46,896 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:46,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689002684] [2020-07-20 02:01:46,897 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7a3a56b 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 02:01:47,003 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7a3a56b issued 4 check-sat command(s) [2020-07-20 02:01:47,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:47,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 69 conjunts are in the unsatisfiable core [2020-07-20 02:01:47,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:47,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2177 backedges. 62 proven. 255 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-20 02:01:47,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956616125] [2020-07-20 02:01:47,488 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:47,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689002684] [2020-07-20 02:01:47,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:47,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-20 02:01:47,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204860992] [2020-07-20 02:01:47,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 02:01:47,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:47,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 02:01:47,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-07-20 02:01:47,489 INFO L87 Difference]: Start difference. First operand 189 states and 194 transitions. Second operand 15 states. [2020-07-20 02:01:48,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:48,384 INFO L93 Difference]: Finished difference Result 207 states and 216 transitions. [2020-07-20 02:01:48,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 02:01:48,385 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 185 [2020-07-20 02:01:48,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:48,387 INFO L225 Difference]: With dead ends: 207 [2020-07-20 02:01:48,387 INFO L226 Difference]: Without dead ends: 205 [2020-07-20 02:01:48,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-07-20 02:01:48,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-07-20 02:01:48,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2020-07-20 02:01:48,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-20 02:01:48,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 213 transitions. [2020-07-20 02:01:48,402 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 213 transitions. Word has length 185 [2020-07-20 02:01:48,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:48,402 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 213 transitions. [2020-07-20 02:01:48,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 02:01:48,402 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 213 transitions. [2020-07-20 02:01:48,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-20 02:01:48,405 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:48,405 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:48,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-07-20 02:01:48,620 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:48,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:48,620 INFO L82 PathProgramCache]: Analyzing trace with hash -2145531795, now seen corresponding path program 20 times [2020-07-20 02:01:48,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:48,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135071775] [2020-07-20 02:01:48,621 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:48,627 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:48,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043806072] [2020-07-20 02:01:48,627 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1c8b5bfe No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:48,708 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1c8b5bfe issued 4 check-sat command(s) [2020-07-20 02:01:48,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:48,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-20 02:01:48,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:49,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2313 backedges. 64 proven. 265 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2020-07-20 02:01:49,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135071775] [2020-07-20 02:01:49,154 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:49,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043806072] [2020-07-20 02:01:49,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:49,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-20 02:01:49,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745028475] [2020-07-20 02:01:49,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 02:01:49,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:49,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 02:01:49,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-07-20 02:01:49,155 INFO L87 Difference]: Start difference. First operand 204 states and 213 transitions. Second operand 15 states. [2020-07-20 02:01:49,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:49,990 INFO L93 Difference]: Finished difference Result 211 states and 219 transitions. [2020-07-20 02:01:49,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 02:01:49,991 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 190 [2020-07-20 02:01:49,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:49,993 INFO L225 Difference]: With dead ends: 211 [2020-07-20 02:01:49,994 INFO L226 Difference]: Without dead ends: 206 [2020-07-20 02:01:49,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-07-20 02:01:49,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-07-20 02:01:50,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-07-20 02:01:50,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-07-20 02:01:50,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 211 transitions. [2020-07-20 02:01:50,008 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 211 transitions. Word has length 190 [2020-07-20 02:01:50,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:50,009 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 211 transitions. [2020-07-20 02:01:50,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 02:01:50,009 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 211 transitions. [2020-07-20 02:01:50,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-07-20 02:01:50,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:50,011 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:50,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:50,214 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:50,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:50,215 INFO L82 PathProgramCache]: Analyzing trace with hash -746648145, now seen corresponding path program 21 times [2020-07-20 02:01:50,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:50,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529429523] [2020-07-20 02:01:50,215 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:50,234 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:50,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346213387] [2020-07-20 02:01:50,234 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52ebe0b0 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 02:01:50,339 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52ebe0b0 issued 4 check-sat command(s) [2020-07-20 02:01:50,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:50,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 75 conjunts are in the unsatisfiable core [2020-07-20 02:01:50,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2620 backedges. 68 proven. 308 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2020-07-20 02:01:51,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529429523] [2020-07-20 02:01:51,038 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:51,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346213387] [2020-07-20 02:01:51,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:51,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-07-20 02:01:51,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147215889] [2020-07-20 02:01:51,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 02:01:51,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:51,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 02:01:51,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-07-20 02:01:51,040 INFO L87 Difference]: Start difference. First operand 206 states and 211 transitions. Second operand 16 states. [2020-07-20 02:01:52,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:52,324 INFO L93 Difference]: Finished difference Result 224 states and 233 transitions. [2020-07-20 02:01:52,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 02:01:52,326 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 202 [2020-07-20 02:01:52,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:52,328 INFO L225 Difference]: With dead ends: 224 [2020-07-20 02:01:52,328 INFO L226 Difference]: Without dead ends: 222 [2020-07-20 02:01:52,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-07-20 02:01:52,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-07-20 02:01:52,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2020-07-20 02:01:52,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-07-20 02:01:52,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 230 transitions. [2020-07-20 02:01:52,341 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 230 transitions. Word has length 202 [2020-07-20 02:01:52,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:52,342 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 230 transitions. [2020-07-20 02:01:52,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 02:01:52,342 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 230 transitions. [2020-07-20 02:01:52,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-07-20 02:01:52,343 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:52,344 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:52,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-07-20 02:01:52,557 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:52,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:52,558 INFO L82 PathProgramCache]: Analyzing trace with hash -239588296, now seen corresponding path program 22 times [2020-07-20 02:01:52,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:52,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928548643] [2020-07-20 02:01:52,558 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:52,564 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:52,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1103731386] [2020-07-20 02:01:52,564 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4cdda015 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:52,646 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4cdda015 issued 4 check-sat command(s) [2020-07-20 02:01:52,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:52,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-20 02:01:52,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:53,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2769 backedges. 70 proven. 319 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2020-07-20 02:01:53,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928548643] [2020-07-20 02:01:53,420 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:53,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103731386] [2020-07-20 02:01:53,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:53,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-07-20 02:01:53,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74037670] [2020-07-20 02:01:53,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 02:01:53,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:53,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 02:01:53,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-07-20 02:01:53,423 INFO L87 Difference]: Start difference. First operand 221 states and 230 transitions. Second operand 16 states. [2020-07-20 02:01:54,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:54,843 INFO L93 Difference]: Finished difference Result 228 states and 236 transitions. [2020-07-20 02:01:54,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 02:01:54,845 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 207 [2020-07-20 02:01:54,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:54,847 INFO L225 Difference]: With dead ends: 228 [2020-07-20 02:01:54,847 INFO L226 Difference]: Without dead ends: 223 [2020-07-20 02:01:54,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-07-20 02:01:54,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-07-20 02:01:54,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2020-07-20 02:01:54,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-07-20 02:01:54,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 228 transitions. [2020-07-20 02:01:54,861 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 228 transitions. Word has length 207 [2020-07-20 02:01:54,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:54,862 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 228 transitions. [2020-07-20 02:01:54,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 02:01:54,862 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 228 transitions. [2020-07-20 02:01:54,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-07-20 02:01:54,864 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:54,864 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:55,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:55,079 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:55,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:55,079 INFO L82 PathProgramCache]: Analyzing trace with hash 2072189178, now seen corresponding path program 23 times [2020-07-20 02:01:55,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:55,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592010601] [2020-07-20 02:01:55,080 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:55,087 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:55,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1039168596] [2020-07-20 02:01:55,089 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5f5f1739 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 02:01:55,189 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5f5f1739 issued 4 check-sat command(s) [2020-07-20 02:01:55,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:55,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 81 conjunts are in the unsatisfiable core [2020-07-20 02:01:55,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:56,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 74 proven. 366 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2020-07-20 02:01:56,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592010601] [2020-07-20 02:01:56,164 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:56,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039168596] [2020-07-20 02:01:56,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:56,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-20 02:01:56,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962793558] [2020-07-20 02:01:56,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 02:01:56,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:56,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 02:01:56,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-07-20 02:01:56,166 INFO L87 Difference]: Start difference. First operand 223 states and 228 transitions. Second operand 17 states. [2020-07-20 02:01:57,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:57,797 INFO L93 Difference]: Finished difference Result 241 states and 250 transitions. [2020-07-20 02:01:57,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 02:01:57,801 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 219 [2020-07-20 02:01:57,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:57,803 INFO L225 Difference]: With dead ends: 241 [2020-07-20 02:01:57,803 INFO L226 Difference]: Without dead ends: 239 [2020-07-20 02:01:57,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-07-20 02:01:57,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-07-20 02:01:57,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2020-07-20 02:01:57,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-07-20 02:01:57,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 247 transitions. [2020-07-20 02:01:57,818 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 247 transitions. Word has length 219 [2020-07-20 02:01:57,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:57,819 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 247 transitions. [2020-07-20 02:01:57,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 02:01:57,819 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 247 transitions. [2020-07-20 02:01:57,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-07-20 02:01:57,821 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:57,821 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:58,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-07-20 02:01:58,034 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:58,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:58,035 INFO L82 PathProgramCache]: Analyzing trace with hash -243370035, now seen corresponding path program 24 times [2020-07-20 02:01:58,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:58,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592001787] [2020-07-20 02:01:58,036 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:01:58,050 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:58,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714708961] [2020-07-20 02:01:58,054 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1e5c039a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:58,202 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1e5c039a issued 4 check-sat command(s) [2020-07-20 02:01:58,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:58,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 55 conjunts are in the unsatisfiable core [2020-07-20 02:01:58,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:59,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3266 backedges. 76 proven. 378 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2020-07-20 02:01:59,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592001787] [2020-07-20 02:01:59,315 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:59,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714708961] [2020-07-20 02:01:59,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:59,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-20 02:01:59,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822644554] [2020-07-20 02:01:59,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 02:01:59,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:59,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 02:01:59,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-07-20 02:01:59,317 INFO L87 Difference]: Start difference. First operand 238 states and 247 transitions. Second operand 17 states. [2020-07-20 02:02:01,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:02:01,026 INFO L93 Difference]: Finished difference Result 245 states and 253 transitions. [2020-07-20 02:02:01,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 02:02:01,027 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 224 [2020-07-20 02:02:01,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:02:01,029 INFO L225 Difference]: With dead ends: 245 [2020-07-20 02:02:01,029 INFO L226 Difference]: Without dead ends: 240 [2020-07-20 02:02:01,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-07-20 02:02:01,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-07-20 02:02:01,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2020-07-20 02:02:01,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-07-20 02:02:01,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 245 transitions. [2020-07-20 02:02:01,043 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 245 transitions. Word has length 224 [2020-07-20 02:02:01,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:02:01,044 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 245 transitions. [2020-07-20 02:02:01,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 02:02:01,044 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 245 transitions. [2020-07-20 02:02:01,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-07-20 02:02:01,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:02:01,046 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 40, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:02:01,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-07-20 02:02:01,262 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:02:01,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:02:01,262 INFO L82 PathProgramCache]: Analyzing trace with hash 930327823, now seen corresponding path program 25 times [2020-07-20 02:02:01,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:02:01,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556312759] [2020-07-20 02:02:01,263 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:02:01,279 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:02:01,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027045592] [2020-07-20 02:02:01,280 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe250a 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 02:02:01,394 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe250a issued 4 check-sat command(s) [2020-07-20 02:02:01,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:02:01,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 87 conjunts are in the unsatisfiable core [2020-07-20 02:02:01,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:02:02,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 80 proven. 429 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2020-07-20 02:02:02,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556312759] [2020-07-20 02:02:02,737 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:02:02,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027045592] [2020-07-20 02:02:02,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:02:02,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-20 02:02:02,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433117706] [2020-07-20 02:02:02,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 02:02:02,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:02:02,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 02:02:02,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-07-20 02:02:02,738 INFO L87 Difference]: Start difference. First operand 240 states and 245 transitions. Second operand 18 states. [2020-07-20 02:02:04,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:02:04,882 INFO L93 Difference]: Finished difference Result 258 states and 267 transitions. [2020-07-20 02:02:04,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 02:02:04,884 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 236 [2020-07-20 02:02:04,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:02:04,886 INFO L225 Difference]: With dead ends: 258 [2020-07-20 02:02:04,887 INFO L226 Difference]: Without dead ends: 256 [2020-07-20 02:02:04,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-07-20 02:02:04,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-07-20 02:02:04,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 255. [2020-07-20 02:02:04,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-07-20 02:02:04,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 264 transitions. [2020-07-20 02:02:04,900 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 264 transitions. Word has length 236 [2020-07-20 02:02:04,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:02:04,901 INFO L479 AbstractCegarLoop]: Abstraction has 255 states and 264 transitions. [2020-07-20 02:02:04,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 02:02:04,901 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 264 transitions. [2020-07-20 02:02:04,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 02:02:04,902 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:02:04,903 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 14, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:02:05,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-07-20 02:02:05,116 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:02:05,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:02:05,117 INFO L82 PathProgramCache]: Analyzing trace with hash -593483560, now seen corresponding path program 26 times [2020-07-20 02:02:05,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:02:05,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874480186] [2020-07-20 02:02:05,117 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:02:05,124 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:02:05,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183229082] [2020-07-20 02:02:05,124 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5f7abe65 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:02:05,224 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5f7abe65 issued 4 check-sat command(s) [2020-07-20 02:02:05,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:02:05,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 59 conjunts are in the unsatisfiable core [2020-07-20 02:02:05,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:02:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3804 backedges. 82 proven. 442 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2020-07-20 02:02:06,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874480186] [2020-07-20 02:02:06,477 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:02:06,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183229082] [2020-07-20 02:02:06,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:02:06,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-20 02:02:06,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353900077] [2020-07-20 02:02:06,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 02:02:06,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:02:06,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 02:02:06,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-07-20 02:02:06,479 INFO L87 Difference]: Start difference. First operand 255 states and 264 transitions. Second operand 18 states. [2020-07-20 02:02:08,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:02:08,707 INFO L93 Difference]: Finished difference Result 262 states and 270 transitions. [2020-07-20 02:02:08,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 02:02:08,710 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 241 [2020-07-20 02:02:08,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:02:08,712 INFO L225 Difference]: With dead ends: 262 [2020-07-20 02:02:08,712 INFO L226 Difference]: Without dead ends: 257 [2020-07-20 02:02:08,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-07-20 02:02:08,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-07-20 02:02:08,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2020-07-20 02:02:08,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-07-20 02:02:08,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 262 transitions. [2020-07-20 02:02:08,726 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 262 transitions. Word has length 241 [2020-07-20 02:02:08,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:02:08,727 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 262 transitions. [2020-07-20 02:02:08,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 02:02:08,727 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 262 transitions. [2020-07-20 02:02:08,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-07-20 02:02:08,729 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:02:08,729 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 43, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:02:08,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:02:08,943 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:02:08,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:02:08,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1345660314, now seen corresponding path program 27 times [2020-07-20 02:02:08,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:02:08,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843053374] [2020-07-20 02:02:08,944 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:02:08,950 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:02:08,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1334312106] [2020-07-20 02:02:08,951 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e98a0c0 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 02:02:09,051 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e98a0c0 issued 4 check-sat command(s) [2020-07-20 02:02:09,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:02:09,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 93 conjunts are in the unsatisfiable core [2020-07-20 02:02:09,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:02:11,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4195 backedges. 86 proven. 497 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2020-07-20 02:02:11,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843053374] [2020-07-20 02:02:11,196 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:02:11,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334312106] [2020-07-20 02:02:11,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:02:11,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-07-20 02:02:11,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557974555] [2020-07-20 02:02:11,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 02:02:11,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:02:11,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 02:02:11,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-07-20 02:02:11,197 INFO L87 Difference]: Start difference. First operand 257 states and 262 transitions. Second operand 19 states. [2020-07-20 02:02:14,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:02:14,353 INFO L93 Difference]: Finished difference Result 275 states and 284 transitions. [2020-07-20 02:02:14,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 02:02:14,356 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 253 [2020-07-20 02:02:14,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:02:14,358 INFO L225 Difference]: With dead ends: 275 [2020-07-20 02:02:14,358 INFO L226 Difference]: Without dead ends: 273 [2020-07-20 02:02:14,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-07-20 02:02:14,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-07-20 02:02:14,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 272. [2020-07-20 02:02:14,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-07-20 02:02:14,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 281 transitions. [2020-07-20 02:02:14,374 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 281 transitions. Word has length 253 [2020-07-20 02:02:14,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:02:14,375 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 281 transitions. [2020-07-20 02:02:14,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 02:02:14,375 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 281 transitions. [2020-07-20 02:02:14,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-07-20 02:02:14,377 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:02:14,377 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 44, 15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:02:14,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-07-20 02:02:14,591 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:02:14,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:02:14,592 INFO L82 PathProgramCache]: Analyzing trace with hash -952414419, now seen corresponding path program 28 times [2020-07-20 02:02:14,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:02:14,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735288750] [2020-07-20 02:02:14,593 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:02:14,602 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:02:14,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143738422] [2020-07-20 02:02:14,602 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3748d997 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:02:14,703 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3748d997 issued 4 check-sat command(s) [2020-07-20 02:02:14,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:02:14,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-20 02:02:14,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:02:16,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4383 backedges. 88 proven. 511 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2020-07-20 02:02:16,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735288750] [2020-07-20 02:02:16,906 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:02:16,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143738422] [2020-07-20 02:02:16,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:02:16,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-07-20 02:02:16,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380124751] [2020-07-20 02:02:16,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 02:02:16,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:02:16,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 02:02:16,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-07-20 02:02:16,908 INFO L87 Difference]: Start difference. First operand 272 states and 281 transitions. Second operand 19 states. [2020-07-20 02:02:20,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:02:20,576 INFO L93 Difference]: Finished difference Result 279 states and 287 transitions. [2020-07-20 02:02:20,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 02:02:20,579 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 258 [2020-07-20 02:02:20,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:02:20,580 INFO L225 Difference]: With dead ends: 279 [2020-07-20 02:02:20,580 INFO L226 Difference]: Without dead ends: 274 [2020-07-20 02:02:20,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-07-20 02:02:20,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-07-20 02:02:20,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2020-07-20 02:02:20,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-07-20 02:02:20,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 279 transitions. [2020-07-20 02:02:20,594 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 279 transitions. Word has length 258 [2020-07-20 02:02:20,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:02:20,594 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 279 transitions. [2020-07-20 02:02:20,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 02:02:20,594 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 279 transitions. [2020-07-20 02:02:20,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-07-20 02:02:20,596 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:02:20,596 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 46, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:02:20,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:02:20,800 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:02:20,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:02:20,801 INFO L82 PathProgramCache]: Analyzing trace with hash -825723793, now seen corresponding path program 29 times [2020-07-20 02:02:20,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:02:20,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704621147] [2020-07-20 02:02:20,802 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:02:20,809 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:02:20,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461169570] [2020-07-20 02:02:20,810 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@399f5130 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 02:02:20,916 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@399f5130 issued 4 check-sat command(s) [2020-07-20 02:02:20,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:02:20,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 99 conjunts are in the unsatisfiable core [2020-07-20 02:02:20,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:02:25,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 92 proven. 570 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2020-07-20 02:02:25,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704621147] [2020-07-20 02:02:25,424 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:02:25,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461169570] [2020-07-20 02:02:25,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:02:25,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-07-20 02:02:25,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258835487] [2020-07-20 02:02:25,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 02:02:25,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:02:25,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 02:02:25,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-07-20 02:02:25,426 INFO L87 Difference]: Start difference. First operand 274 states and 279 transitions. Second operand 20 states. [2020-07-20 02:02:31,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:02:31,020 INFO L93 Difference]: Finished difference Result 292 states and 301 transitions. [2020-07-20 02:02:31,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 02:02:31,023 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 270 [2020-07-20 02:02:31,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:02:31,025 INFO L225 Difference]: With dead ends: 292 [2020-07-20 02:02:31,026 INFO L226 Difference]: Without dead ends: 290 [2020-07-20 02:02:31,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-07-20 02:02:31,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-07-20 02:02:31,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 289. [2020-07-20 02:02:31,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-07-20 02:02:31,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 298 transitions. [2020-07-20 02:02:31,042 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 298 transitions. Word has length 270 [2020-07-20 02:02:31,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:02:31,042 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 298 transitions. [2020-07-20 02:02:31,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 02:02:31,043 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 298 transitions. [2020-07-20 02:02:31,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-07-20 02:02:31,045 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:02:31,045 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 47, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:02:31,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-07-20 02:02:31,259 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:02:31,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:02:31,260 INFO L82 PathProgramCache]: Analyzing trace with hash -234816136, now seen corresponding path program 30 times [2020-07-20 02:02:31,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:02:31,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549444962] [2020-07-20 02:02:31,260 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:02:31,271 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:02:31,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1954216444] [2020-07-20 02:02:31,272 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@252eeb1d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:02:31,399 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@252eeb1d issued 4 check-sat command(s) [2020-07-20 02:02:31,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:02:31,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 67 conjunts are in the unsatisfiable core [2020-07-20 02:02:31,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:02:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5003 backedges. 94 proven. 585 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2020-07-20 02:02:35,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549444962] [2020-07-20 02:02:35,850 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:02:35,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954216444] [2020-07-20 02:02:35,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:02:35,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-07-20 02:02:35,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831919261] [2020-07-20 02:02:35,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 02:02:35,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:02:35,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 02:02:35,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-07-20 02:02:35,852 INFO L87 Difference]: Start difference. First operand 289 states and 298 transitions. Second operand 20 states. [2020-07-20 02:02:41,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:02:41,416 INFO L93 Difference]: Finished difference Result 296 states and 304 transitions. [2020-07-20 02:02:41,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 02:02:41,419 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 275 [2020-07-20 02:02:41,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:02:41,421 INFO L225 Difference]: With dead ends: 296 [2020-07-20 02:02:41,421 INFO L226 Difference]: Without dead ends: 291 [2020-07-20 02:02:41,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-07-20 02:02:41,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-07-20 02:02:41,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2020-07-20 02:02:41,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-07-20 02:02:41,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 296 transitions. [2020-07-20 02:02:41,443 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 296 transitions. Word has length 275 [2020-07-20 02:02:41,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:02:41,443 INFO L479 AbstractCegarLoop]: Abstraction has 291 states and 296 transitions. [2020-07-20 02:02:41,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 02:02:41,444 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 296 transitions. [2020-07-20 02:02:41,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-07-20 02:02:41,445 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:02:41,446 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 49, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:02:41,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-07-20 02:02:41,661 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:02:41,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:02:41,661 INFO L82 PathProgramCache]: Analyzing trace with hash -388232646, now seen corresponding path program 31 times [2020-07-20 02:02:41,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:02:41,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367729296] [2020-07-20 02:02:41,662 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:02:41,667 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:02:41,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100004366] [2020-07-20 02:02:41,668 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15ab4898 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 02:02:41,796 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15ab4898 issued 4 check-sat command(s) [2020-07-20 02:02:41,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:02:41,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 105 conjunts are in the unsatisfiable core [2020-07-20 02:02:41,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:02:42,115 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:02:42,339 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:02:42,594 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:42,864 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:02:43,168 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:02:43,506 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:44,276 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:02:45,159 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:02:45,669 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:02:46,223 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 02:02:46,816 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-20 02:02:47,444 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:02:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5450 backedges. 98 proven. 648 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2020-07-20 02:02:49,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367729296] [2020-07-20 02:02:49,143 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:02:49,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100004366] [2020-07-20 02:02:49,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:02:49,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-20 02:02:49,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087682240] [2020-07-20 02:02:49,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 02:02:49,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:02:49,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 02:02:49,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-07-20 02:02:49,145 INFO L87 Difference]: Start difference. First operand 291 states and 296 transitions. Second operand 21 states. [2020-07-20 02:02:57,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:02:57,922 INFO L93 Difference]: Finished difference Result 309 states and 318 transitions. [2020-07-20 02:02:57,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 02:02:57,928 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 287 [2020-07-20 02:02:57,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:02:57,930 INFO L225 Difference]: With dead ends: 309 [2020-07-20 02:02:57,930 INFO L226 Difference]: Without dead ends: 307 [2020-07-20 02:02:57,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-07-20 02:02:57,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-07-20 02:02:57,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 306. [2020-07-20 02:02:57,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-07-20 02:02:57,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 315 transitions. [2020-07-20 02:02:57,957 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 315 transitions. Word has length 287 [2020-07-20 02:02:57,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:02:57,958 INFO L479 AbstractCegarLoop]: Abstraction has 306 states and 315 transitions. [2020-07-20 02:02:57,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 02:02:57,958 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 315 transitions. [2020-07-20 02:02:57,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2020-07-20 02:02:57,960 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:02:57,960 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 50, 17, 17, 17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:02:58,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-07-20 02:02:58,174 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:02:58,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:02:58,175 INFO L82 PathProgramCache]: Analyzing trace with hash -934654323, now seen corresponding path program 32 times [2020-07-20 02:02:58,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:02:58,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299576460] [2020-07-20 02:02:58,175 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:02:58,182 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:02:58,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368944875] [2020-07-20 02:02:58,183 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3c09ccfc No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:02:58,296 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3c09ccfc issued 4 check-sat command(s) [2020-07-20 02:02:58,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:02:58,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 71 conjunts are in the unsatisfiable core [2020-07-20 02:02:58,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:03:04,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5664 backedges. 100 proven. 664 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2020-07-20 02:03:04,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299576460] [2020-07-20 02:03:04,348 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:03:04,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368944875] [2020-07-20 02:03:04,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:03:04,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-20 02:03:04,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300355940] [2020-07-20 02:03:04,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 02:03:04,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:03:04,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 02:03:04,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-07-20 02:03:04,350 INFO L87 Difference]: Start difference. First operand 306 states and 315 transitions. Second operand 21 states. [2020-07-20 02:03:12,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:03:12,046 INFO L93 Difference]: Finished difference Result 313 states and 321 transitions. [2020-07-20 02:03:12,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 02:03:12,049 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 292 [2020-07-20 02:03:12,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:03:12,051 INFO L225 Difference]: With dead ends: 313 [2020-07-20 02:03:12,052 INFO L226 Difference]: Without dead ends: 308 [2020-07-20 02:03:12,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-07-20 02:03:12,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-07-20 02:03:12,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2020-07-20 02:03:12,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-07-20 02:03:12,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 313 transitions. [2020-07-20 02:03:12,066 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 313 transitions. Word has length 292 [2020-07-20 02:03:12,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:03:12,066 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 313 transitions. [2020-07-20 02:03:12,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 02:03:12,067 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 313 transitions. [2020-07-20 02:03:12,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2020-07-20 02:03:12,069 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:03:12,069 INFO L422 BasicCegarLoop]: trace histogram [53, 52, 52, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:03:12,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-07-20 02:03:12,284 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:03:12,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:03:12,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1619827761, now seen corresponding path program 33 times [2020-07-20 02:03:12,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:03:12,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837127561] [2020-07-20 02:03:12,285 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:03:12,292 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:03:12,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814480997] [2020-07-20 02:03:12,293 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fc1d2e4 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 02:03:12,405 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fc1d2e4 issued 4 check-sat command(s) [2020-07-20 02:03:12,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:03:12,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 111 conjunts are in the unsatisfiable core [2020-07-20 02:03:12,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:03:12,986 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:03:13,300 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 02:03:13,652 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:14,042 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:03:14,473 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:14,947 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:03:15,505 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:16,095 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:16,760 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:17,459 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:03:18,193 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:03:18,970 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:03:19,779 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:20,620 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6139 backedges. 104 proven. 731 refuted. 0 times theorem prover too weak. 5304 trivial. 0 not checked. [2020-07-20 02:03:22,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837127561] [2020-07-20 02:03:22,895 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:03:22,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814480997] [2020-07-20 02:03:22,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:03:22,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-07-20 02:03:22,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356134850] [2020-07-20 02:03:22,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 02:03:22,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:03:22,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 02:03:22,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-07-20 02:03:22,897 INFO L87 Difference]: Start difference. First operand 308 states and 313 transitions. Second operand 22 states. [2020-07-20 02:03:34,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:03:34,783 INFO L93 Difference]: Finished difference Result 326 states and 335 transitions. [2020-07-20 02:03:34,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 02:03:34,787 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 304 [2020-07-20 02:03:34,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:03:34,789 INFO L225 Difference]: With dead ends: 326 [2020-07-20 02:03:34,789 INFO L226 Difference]: Without dead ends: 324 [2020-07-20 02:03:34,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-07-20 02:03:34,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-07-20 02:03:34,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 323. [2020-07-20 02:03:34,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-07-20 02:03:34,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 332 transitions. [2020-07-20 02:03:34,805 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 332 transitions. Word has length 304 [2020-07-20 02:03:34,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:03:34,805 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 332 transitions. [2020-07-20 02:03:34,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 02:03:34,805 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 332 transitions. [2020-07-20 02:03:34,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-07-20 02:03:34,808 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:03:34,808 INFO L422 BasicCegarLoop]: trace histogram [54, 53, 53, 18, 18, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:03:35,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-07-20 02:03:35,013 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:03:35,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:03:35,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1973725720, now seen corresponding path program 34 times [2020-07-20 02:03:35,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:03:35,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460364493] [2020-07-20 02:03:35,014 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:03:35,021 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:03:35,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029804419] [2020-07-20 02:03:35,022 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2e491752 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:03:35,153 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2e491752 issued 4 check-sat command(s) [2020-07-20 02:03:35,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:03:35,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 75 conjunts are in the unsatisfiable core [2020-07-20 02:03:35,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:03:43,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6366 backedges. 106 proven. 748 refuted. 0 times theorem prover too weak. 5512 trivial. 0 not checked. [2020-07-20 02:03:43,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460364493] [2020-07-20 02:03:43,648 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:03:43,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029804419] [2020-07-20 02:03:43,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:03:43,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-07-20 02:03:43,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826961557] [2020-07-20 02:03:43,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 02:03:43,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:03:43,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 02:03:43,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-07-20 02:03:43,650 INFO L87 Difference]: Start difference. First operand 323 states and 332 transitions. Second operand 22 states. [2020-07-20 02:03:53,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:03:53,211 INFO L93 Difference]: Finished difference Result 330 states and 338 transitions. [2020-07-20 02:03:53,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 02:03:53,215 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 309 [2020-07-20 02:03:53,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:03:53,217 INFO L225 Difference]: With dead ends: 330 [2020-07-20 02:03:53,217 INFO L226 Difference]: Without dead ends: 325 [2020-07-20 02:03:53,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-07-20 02:03:53,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-07-20 02:03:53,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2020-07-20 02:03:53,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-07-20 02:03:53,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 330 transitions. [2020-07-20 02:03:53,232 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 330 transitions. Word has length 309 [2020-07-20 02:03:53,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:03:53,233 INFO L479 AbstractCegarLoop]: Abstraction has 325 states and 330 transitions. [2020-07-20 02:03:53,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 02:03:53,233 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 330 transitions. [2020-07-20 02:03:53,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-07-20 02:03:53,236 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:03:53,236 INFO L422 BasicCegarLoop]: trace histogram [56, 55, 55, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:03:53,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-07-20 02:03:53,452 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:03:53,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:03:53,452 INFO L82 PathProgramCache]: Analyzing trace with hash 708953818, now seen corresponding path program 35 times [2020-07-20 02:03:53,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:03:53,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734401437] [2020-07-20 02:03:53,453 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:03:53,461 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:03:53,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815717091] [2020-07-20 02:03:53,461 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b743d1a 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 02:03:53,584 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b743d1a issued 4 check-sat command(s) [2020-07-20 02:03:53,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:03:53,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 117 conjunts are in the unsatisfiable core [2020-07-20 02:03:53,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:03:53,988 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:54,287 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:54,644 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:03:55,041 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:55,484 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:55,975 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:03:56,517 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:57,107 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:57,749 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:03:58,433 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:03:59,188 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 02:03:59,987 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:04:00,836 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:04:01,694 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:04:02,649 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:03,604 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:04:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6869 backedges. 110 proven. 819 refuted. 0 times theorem prover too weak. 5940 trivial. 0 not checked. [2020-07-20 02:04:06,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734401437] [2020-07-20 02:04:06,203 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:04:06,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815717091] [2020-07-20 02:04:06,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:04:06,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-20 02:04:06,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125676624] [2020-07-20 02:04:06,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 02:04:06,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:04:06,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 02:04:06,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-07-20 02:04:06,205 INFO L87 Difference]: Start difference. First operand 325 states and 330 transitions. Second operand 23 states. [2020-07-20 02:04:20,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:04:20,280 INFO L93 Difference]: Finished difference Result 343 states and 352 transitions. [2020-07-20 02:04:20,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 02:04:20,284 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 321 [2020-07-20 02:04:20,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:04:20,286 INFO L225 Difference]: With dead ends: 343 [2020-07-20 02:04:20,286 INFO L226 Difference]: Without dead ends: 341 [2020-07-20 02:04:20,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-07-20 02:04:20,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-07-20 02:04:20,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 340. [2020-07-20 02:04:20,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-07-20 02:04:20,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 349 transitions. [2020-07-20 02:04:20,302 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 349 transitions. Word has length 321 [2020-07-20 02:04:20,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:04:20,303 INFO L479 AbstractCegarLoop]: Abstraction has 340 states and 349 transitions. [2020-07-20 02:04:20,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 02:04:20,303 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 349 transitions. [2020-07-20 02:04:20,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 02:04:20,305 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:04:20,305 INFO L422 BasicCegarLoop]: trace histogram [57, 56, 56, 19, 19, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:04:20,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-07-20 02:04:20,521 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:04:20,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:04:20,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2116122093, now seen corresponding path program 36 times [2020-07-20 02:04:20,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:04:20,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629170377] [2020-07-20 02:04:20,522 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:04:20,529 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:04:20,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1103582286] [2020-07-20 02:04:20,530 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@199f1dc4 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:04:20,661 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@199f1dc4 issued 4 check-sat command(s) [2020-07-20 02:04:20,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:04:20,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 79 conjunts are in the unsatisfiable core [2020-07-20 02:04:20,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:04:24,263 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:04:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7109 backedges. 112 proven. 837 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2020-07-20 02:04:30,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629170377] [2020-07-20 02:04:30,231 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:04:30,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103582286] [2020-07-20 02:04:30,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:04:30,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-20 02:04:30,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473802899] [2020-07-20 02:04:30,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 02:04:30,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:04:30,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 02:04:30,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-07-20 02:04:30,232 INFO L87 Difference]: Start difference. First operand 340 states and 349 transitions. Second operand 23 states. [2020-07-20 02:04:41,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:04:41,237 INFO L93 Difference]: Finished difference Result 347 states and 355 transitions. [2020-07-20 02:04:41,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 02:04:41,241 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 326 [2020-07-20 02:04:41,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:04:41,243 INFO L225 Difference]: With dead ends: 347 [2020-07-20 02:04:41,243 INFO L226 Difference]: Without dead ends: 342 [2020-07-20 02:04:41,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-07-20 02:04:41,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-07-20 02:04:41,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2020-07-20 02:04:41,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-07-20 02:04:41,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 347 transitions. [2020-07-20 02:04:41,260 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 347 transitions. Word has length 326 [2020-07-20 02:04:41,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:04:41,260 INFO L479 AbstractCegarLoop]: Abstraction has 342 states and 347 transitions. [2020-07-20 02:04:41,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 02:04:41,261 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 347 transitions. [2020-07-20 02:04:41,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-20 02:04:41,263 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:04:41,263 INFO L422 BasicCegarLoop]: trace histogram [59, 58, 58, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:04:41,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-07-20 02:04:41,477 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:04:41,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:04:41,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1310033105, now seen corresponding path program 37 times [2020-07-20 02:04:41,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:04:41,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030618703] [2020-07-20 02:04:41,477 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:04:41,484 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:04:41,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771779258] [2020-07-20 02:04:41,484 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b828df 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 02:04:41,625 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b828df issued 4 check-sat command(s) [2020-07-20 02:04:41,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:04:41,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 123 conjunts are in the unsatisfiable core [2020-07-20 02:04:41,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:04:41,801 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:04:42,003 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:04:42,343 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 02:04:42,734 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:04:43,176 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:43,677 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:44,241 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 02:04:44,843 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 02:04:45,509 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:46,219 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:04:47,020 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:04:47,882 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:04:48,779 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:04:49,710 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:50,697 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:51,762 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:04:52,875 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:54,031 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:04:57,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7640 backedges. 116 proven. 912 refuted. 0 times theorem prover too weak. 6612 trivial. 0 not checked. [2020-07-20 02:04:57,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030618703] [2020-07-20 02:04:57,153 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:04:57,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771779258] [2020-07-20 02:04:57,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:04:57,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-07-20 02:04:57,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717742742] [2020-07-20 02:04:57,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 02:04:57,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:04:57,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 02:04:57,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-07-20 02:04:57,155 INFO L87 Difference]: Start difference. First operand 342 states and 347 transitions. Second operand 24 states. [2020-07-20 02:05:14,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:05:14,404 INFO L93 Difference]: Finished difference Result 360 states and 369 transitions. [2020-07-20 02:05:14,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 02:05:14,409 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 338 [2020-07-20 02:05:14,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:05:14,411 INFO L225 Difference]: With dead ends: 360 [2020-07-20 02:05:14,411 INFO L226 Difference]: Without dead ends: 358 [2020-07-20 02:05:14,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2020-07-20 02:05:14,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-07-20 02:05:14,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 357. [2020-07-20 02:05:14,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-07-20 02:05:14,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 366 transitions. [2020-07-20 02:05:14,427 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 366 transitions. Word has length 338 [2020-07-20 02:05:14,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:05:14,428 INFO L479 AbstractCegarLoop]: Abstraction has 357 states and 366 transitions. [2020-07-20 02:05:14,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 02:05:14,428 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 366 transitions. [2020-07-20 02:05:14,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-07-20 02:05:14,430 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:05:14,430 INFO L422 BasicCegarLoop]: trace histogram [60, 59, 59, 20, 20, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:05:14,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:05:14,645 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:05:14,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:05:14,645 INFO L82 PathProgramCache]: Analyzing trace with hash 953495224, now seen corresponding path program 38 times [2020-07-20 02:05:14,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:05:14,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287312452] [2020-07-20 02:05:14,646 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:05:14,651 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:05:14,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139888722] [2020-07-20 02:05:14,652 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56999195 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:05:14,783 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56999195 issued 4 check-sat command(s) [2020-07-20 02:05:14,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:05:14,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 83 conjunts are in the unsatisfiable core [2020-07-20 02:05:14,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:05:14,964 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:05:15,325 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:05:15,629 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:05:15,983 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:05:16,338 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:05:16,741 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:05:17,195 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:05:17,718 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:18,296 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:05:18,854 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:05:19,461 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:05:20,213 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:05:20,928 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:05:21,698 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:05:22,555 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:05:23,420 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:05:24,313 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:05:25,261 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:05:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7893 backedges. 118 proven. 931 refuted. 0 times theorem prover too weak. 6844 trivial. 0 not checked. [2020-07-20 02:05:26,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287312452] [2020-07-20 02:05:26,854 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:05:26,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139888722] [2020-07-20 02:05:26,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:05:26,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-07-20 02:05:26,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666596072] [2020-07-20 02:05:26,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 02:05:26,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:05:26,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 02:05:26,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-07-20 02:05:26,856 INFO L87 Difference]: Start difference. First operand 357 states and 366 transitions. Second operand 24 states. [2020-07-20 02:05:42,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:05:42,111 INFO L93 Difference]: Finished difference Result 364 states and 372 transitions. [2020-07-20 02:05:42,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 02:05:42,116 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 343 [2020-07-20 02:05:42,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:05:42,117 INFO L225 Difference]: With dead ends: 364 [2020-07-20 02:05:42,117 INFO L226 Difference]: Without dead ends: 359 [2020-07-20 02:05:42,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2020-07-20 02:05:42,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-07-20 02:05:42,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2020-07-20 02:05:42,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2020-07-20 02:05:42,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 364 transitions. [2020-07-20 02:05:42,134 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 364 transitions. Word has length 343 [2020-07-20 02:05:42,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:05:42,134 INFO L479 AbstractCegarLoop]: Abstraction has 359 states and 364 transitions. [2020-07-20 02:05:42,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 02:05:42,135 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 364 transitions. [2020-07-20 02:05:42,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2020-07-20 02:05:42,137 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:05:42,137 INFO L422 BasicCegarLoop]: trace histogram [62, 61, 61, 21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:05:42,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:05:42,351 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:05:42,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:05:42,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1185962874, now seen corresponding path program 39 times [2020-07-20 02:05:42,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:05:42,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381649701] [2020-07-20 02:05:42,352 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:05:42,364 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:05:42,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286063347] [2020-07-20 02:05:42,365 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@ea122d7 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 02:05:42,518 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@ea122d7 issued 4 check-sat command(s) [2020-07-20 02:05:42,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:05:42,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 129 conjunts are in the unsatisfiable core [2020-07-20 02:05:42,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:05:42,712 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:05:43,056 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:43,436 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:43,872 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:05:44,374 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:05:44,944 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:45,571 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:05:46,266 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:47,057 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:05:47,898 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:48,782 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:05:49,710 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:05:50,704 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:05:51,765 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:52,949 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:54,155 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:05:55,429 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:05:56,780 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:05:58,148 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:59,292 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-07-20 02:06:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8452 backedges. 122 proven. 1010 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2020-07-20 02:06:01,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381649701] [2020-07-20 02:06:01,889 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:06:01,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286063347] [2020-07-20 02:06:01,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:06:01,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-07-20 02:06:01,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609214316] [2020-07-20 02:06:01,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 02:06:01,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:06:01,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 02:06:01,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-07-20 02:06:01,891 INFO L87 Difference]: Start difference. First operand 359 states and 364 transitions. Second operand 25 states. [2020-07-20 02:06:23,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:06:23,297 INFO L93 Difference]: Finished difference Result 377 states and 386 transitions. [2020-07-20 02:06:23,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 02:06:23,301 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 355 [2020-07-20 02:06:23,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:06:23,303 INFO L225 Difference]: With dead ends: 377 [2020-07-20 02:06:23,303 INFO L226 Difference]: Without dead ends: 375 [2020-07-20 02:06:23,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-07-20 02:06:23,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-07-20 02:06:23,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 374. [2020-07-20 02:06:23,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-07-20 02:06:23,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 383 transitions. [2020-07-20 02:06:23,320 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 383 transitions. Word has length 355 [2020-07-20 02:06:23,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:06:23,321 INFO L479 AbstractCegarLoop]: Abstraction has 374 states and 383 transitions. [2020-07-20 02:06:23,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 02:06:23,321 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 383 transitions. [2020-07-20 02:06:23,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-07-20 02:06:23,324 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:06:23,324 INFO L422 BasicCegarLoop]: trace histogram [63, 62, 62, 21, 21, 21, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:06:23,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-07-20 02:06:23,538 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:06:23,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:06:23,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1799961267, now seen corresponding path program 40 times [2020-07-20 02:06:23,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:06:23,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776970792] [2020-07-20 02:06:23,539 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:06:23,545 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:06:23,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080986880] [2020-07-20 02:06:23,546 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38edf4f7 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:06:23,685 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38edf4f7 issued 4 check-sat command(s) [2020-07-20 02:06:23,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:06:23,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 87 conjunts are in the unsatisfiable core [2020-07-20 02:06:23,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:06:23,884 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:06:24,115 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:06:24,399 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:24,734 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:25,103 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:25,541 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:26,034 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:26,555 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:27,098 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:06:27,683 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:28,318 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:06:29,004 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:29,735 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:30,544 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:31,417 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:32,291 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:33,185 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:34,138 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:35,137 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:36,167 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:06:38,096 INFO L134 CoverageAnalysis]: Checked inductivity of 8718 backedges. 124 proven. 1030 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2020-07-20 02:06:38,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776970792] [2020-07-20 02:06:38,096 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:06:38,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080986880] [2020-07-20 02:06:38,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:06:38,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-07-20 02:06:38,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985175981] [2020-07-20 02:06:38,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 02:06:38,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:06:38,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 02:06:38,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-07-20 02:06:38,098 INFO L87 Difference]: Start difference. First operand 374 states and 383 transitions. Second operand 25 states. [2020-07-20 02:06:55,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:06:55,723 INFO L93 Difference]: Finished difference Result 381 states and 389 transitions. [2020-07-20 02:06:55,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 02:06:55,728 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 360 [2020-07-20 02:06:55,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:06:55,730 INFO L225 Difference]: With dead ends: 381 [2020-07-20 02:06:55,730 INFO L226 Difference]: Without dead ends: 376 [2020-07-20 02:06:55,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-07-20 02:06:55,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-07-20 02:06:55,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2020-07-20 02:06:55,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-07-20 02:06:55,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 381 transitions. [2020-07-20 02:06:55,746 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 381 transitions. Word has length 360 [2020-07-20 02:06:55,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:06:55,746 INFO L479 AbstractCegarLoop]: Abstraction has 376 states and 381 transitions. [2020-07-20 02:06:55,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 02:06:55,747 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 381 transitions. [2020-07-20 02:06:55,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2020-07-20 02:06:55,749 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:06:55,750 INFO L422 BasicCegarLoop]: trace histogram [65, 64, 64, 22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:06:55,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:06:55,964 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:06:55,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:06:55,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1898166927, now seen corresponding path program 41 times [2020-07-20 02:06:55,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:06:55,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780379339] [2020-07-20 02:06:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:06:55,972 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:06:55,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584935143] [2020-07-20 02:06:55,973 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40055333 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 02:06:56,113 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40055333 issued 4 check-sat command(s) [2020-07-20 02:06:56,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:06:56,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 135 conjunts are in the unsatisfiable core [2020-07-20 02:06:56,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:06:56,335 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:56,673 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:06:57,108 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:57,607 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:06:58,180 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:58,836 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:59,571 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 02:07:00,357 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:01,222 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:02,153 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:03,166 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:04,275 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:05,435 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:07:06,638 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:07,930 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:09,287 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:07:10,723 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:12,297 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 02:07:13,903 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:15,576 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:07:16,969 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-07-20 02:07:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9305 backedges. 128 proven. 1113 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2020-07-20 02:07:20,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780379339] [2020-07-20 02:07:20,044 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:07:20,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584935143] [2020-07-20 02:07:20,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:07:20,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-07-20 02:07:20,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811068355] [2020-07-20 02:07:20,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 02:07:20,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:07:20,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 02:07:20,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-07-20 02:07:20,046 INFO L87 Difference]: Start difference. First operand 376 states and 381 transitions. Second operand 26 states. [2020-07-20 02:07:46,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:07:46,180 INFO L93 Difference]: Finished difference Result 394 states and 403 transitions. [2020-07-20 02:07:46,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 02:07:46,185 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 372 [2020-07-20 02:07:46,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:07:46,187 INFO L225 Difference]: With dead ends: 394 [2020-07-20 02:07:46,187 INFO L226 Difference]: Without dead ends: 392 [2020-07-20 02:07:46,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2020-07-20 02:07:46,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2020-07-20 02:07:46,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 391. [2020-07-20 02:07:46,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-07-20 02:07:46,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 400 transitions. [2020-07-20 02:07:46,214 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 400 transitions. Word has length 372 [2020-07-20 02:07:46,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:07:46,214 INFO L479 AbstractCegarLoop]: Abstraction has 391 states and 400 transitions. [2020-07-20 02:07:46,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 02:07:46,215 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 400 transitions. [2020-07-20 02:07:46,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-07-20 02:07:46,217 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:07:46,218 INFO L422 BasicCegarLoop]: trace histogram [66, 65, 65, 22, 22, 22, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:07:46,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:07:46,431 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:07:46,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:07:46,431 INFO L82 PathProgramCache]: Analyzing trace with hash 979143512, now seen corresponding path program 42 times [2020-07-20 02:07:46,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:07:46,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419101258] [2020-07-20 02:07:46,432 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:07:46,438 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:07:46,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027704926] [2020-07-20 02:07:46,439 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1e0d1c84 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:07:46,585 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1e0d1c84 issued 4 check-sat command(s) [2020-07-20 02:07:46,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:07:46,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 91 conjunts are in the unsatisfiable core [2020-07-20 02:07:46,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:07:46,804 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:07:47,019 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:07:47,343 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:07:47,694 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:07:48,098 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 02:07:48,554 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:07:49,059 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:07:49,611 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:07:50,204 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:07:50,856 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:07:51,562 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 02:07:52,326 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:07:53,270 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:54,144 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:07:55,038 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:07:56,014 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:07:57,028 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:07:58,114 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:07:59,281 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:08:00,331 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:08:01,586 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9584 backedges. 130 proven. 1134 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2020-07-20 02:08:03,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419101258] [2020-07-20 02:08:03,608 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:08:03,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027704926] [2020-07-20 02:08:03,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:08:03,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-07-20 02:08:03,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495859795] [2020-07-20 02:08:03,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 02:08:03,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:08:03,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 02:08:03,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-07-20 02:08:03,610 INFO L87 Difference]: Start difference. First operand 391 states and 400 transitions. Second operand 26 states. [2020-07-20 02:08:23,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:08:23,853 INFO L93 Difference]: Finished difference Result 398 states and 406 transitions. [2020-07-20 02:08:23,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 02:08:23,858 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 377 [2020-07-20 02:08:23,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:08:23,860 INFO L225 Difference]: With dead ends: 398 [2020-07-20 02:08:23,860 INFO L226 Difference]: Without dead ends: 393 [2020-07-20 02:08:23,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2020-07-20 02:08:23,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-07-20 02:08:23,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2020-07-20 02:08:23,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-07-20 02:08:23,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 398 transitions. [2020-07-20 02:08:23,878 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 398 transitions. Word has length 377 [2020-07-20 02:08:23,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:08:23,878 INFO L479 AbstractCegarLoop]: Abstraction has 393 states and 398 transitions. [2020-07-20 02:08:23,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 02:08:23,879 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 398 transitions. [2020-07-20 02:08:23,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-07-20 02:08:23,881 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:08:23,881 INFO L422 BasicCegarLoop]: trace histogram [68, 67, 67, 23, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:08:24,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-07-20 02:08:24,096 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:08:24,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:08:24,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1576126490, now seen corresponding path program 43 times [2020-07-20 02:08:24,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:08:24,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395023452] [2020-07-20 02:08:24,096 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:08:24,107 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:08:24,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851474558] [2020-07-20 02:08:24,107 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@d43f327 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 02:08:24,248 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@d43f327 issued 4 check-sat command(s) [2020-07-20 02:08:24,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:08:24,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 141 conjunts are in the unsatisfiable core [2020-07-20 02:08:24,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:08:24,491 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:08:24,765 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:08:25,218 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:08:25,726 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:08:26,306 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:26,941 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:08:27,667 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:28,486 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:29,385 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:30,352 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:31,370 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:32,454 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:08:33,562 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:08:34,855 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:08:36,182 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:08:37,509 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:38,949 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 02:08:40,429 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 02:08:42,039 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:08:43,654 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:45,333 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:46,751 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-07-20 02:08:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10199 backedges. 134 proven. 1221 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2020-07-20 02:08:49,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395023452] [2020-07-20 02:08:49,850 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:08:49,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851474558] [2020-07-20 02:08:49,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:08:49,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-07-20 02:08:49,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331622226] [2020-07-20 02:08:49,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 02:08:49,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:08:49,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 02:08:49,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-07-20 02:08:49,851 INFO L87 Difference]: Start difference. First operand 393 states and 398 transitions. Second operand 27 states. [2020-07-20 02:09:18,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:09:18,102 INFO L93 Difference]: Finished difference Result 411 states and 420 transitions. [2020-07-20 02:09:18,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-20 02:09:18,107 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 389 [2020-07-20 02:09:18,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:09:18,109 INFO L225 Difference]: With dead ends: 411 [2020-07-20 02:09:18,109 INFO L226 Difference]: Without dead ends: 409 [2020-07-20 02:09:18,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2020-07-20 02:09:18,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2020-07-20 02:09:18,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 408. [2020-07-20 02:09:18,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-07-20 02:09:18,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 417 transitions. [2020-07-20 02:09:18,126 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 417 transitions. Word has length 389 [2020-07-20 02:09:18,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:09:18,126 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 417 transitions. [2020-07-20 02:09:18,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 02:09:18,126 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 417 transitions. [2020-07-20 02:09:18,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2020-07-20 02:09:18,129 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:09:18,129 INFO L422 BasicCegarLoop]: trace histogram [69, 68, 68, 23, 23, 23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:09:18,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-07-20 02:09:18,343 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:09:18,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:09:18,344 INFO L82 PathProgramCache]: Analyzing trace with hash 981482669, now seen corresponding path program 44 times [2020-07-20 02:09:18,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:09:18,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386528288] [2020-07-20 02:09:18,345 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:09:18,351 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:09:18,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [777536623] [2020-07-20 02:09:18,351 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fd913ef No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:09:18,499 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fd913ef issued 4 check-sat command(s) [2020-07-20 02:09:18,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:09:18,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 95 conjunts are in the unsatisfiable core [2020-07-20 02:09:18,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:09:18,723 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:09:18,990 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:09:19,304 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:09:19,675 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:09:20,100 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:09:20,572 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:09:21,094 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:09:21,663 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:09:22,332 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:23,017 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:09:23,753 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:09:24,560 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:09:25,426 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:09:26,354 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:09:27,360 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:09:28,589 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:09:29,709 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:09:30,878 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:09:32,001 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:09:33,227 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:09:34,521 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:09:35,874 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:09:38,347 INFO L134 CoverageAnalysis]: Checked inductivity of 10491 backedges. 136 proven. 1243 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2020-07-20 02:09:38,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386528288] [2020-07-20 02:09:38,347 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:09:38,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777536623] [2020-07-20 02:09:38,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:09:38,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-07-20 02:09:38,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112088563] [2020-07-20 02:09:38,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 02:09:38,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:09:38,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 02:09:38,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-07-20 02:09:38,349 INFO L87 Difference]: Start difference. First operand 408 states and 417 transitions. Second operand 27 states. [2020-07-20 02:10:02,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:10:02,148 INFO L93 Difference]: Finished difference Result 415 states and 423 transitions. [2020-07-20 02:10:02,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-20 02:10:02,154 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 394 [2020-07-20 02:10:02,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:10:02,155 INFO L225 Difference]: With dead ends: 415 [2020-07-20 02:10:02,156 INFO L226 Difference]: Without dead ends: 410 [2020-07-20 02:10:02,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2020-07-20 02:10:02,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-07-20 02:10:02,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2020-07-20 02:10:02,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410 states. [2020-07-20 02:10:02,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 415 transitions. [2020-07-20 02:10:02,172 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 415 transitions. Word has length 394 [2020-07-20 02:10:02,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:10:02,173 INFO L479 AbstractCegarLoop]: Abstraction has 410 states and 415 transitions. [2020-07-20 02:10:02,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 02:10:02,173 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 415 transitions. [2020-07-20 02:10:02,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2020-07-20 02:10:02,176 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:10:02,176 INFO L422 BasicCegarLoop]: trace histogram [71, 70, 70, 24, 24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:10:02,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-07-20 02:10:02,390 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:10:02,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:10:02,390 INFO L82 PathProgramCache]: Analyzing trace with hash 177545711, now seen corresponding path program 45 times [2020-07-20 02:10:02,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:10:02,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237703435] [2020-07-20 02:10:02,391 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:10:02,398 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:10:02,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931462834] [2020-07-20 02:10:02,399 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@308728 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 02:10:02,548 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@308728 issued 4 check-sat command(s) [2020-07-20 02:10:02,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:10:02,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 147 conjunts are in the unsatisfiable core [2020-07-20 02:10:02,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:10:02,836 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:10:03,263 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:10:03,801 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:10:04,432 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:05,084 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:05,824 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:10:06,653 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:10:07,538 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:10:08,516 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:09,568 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:10:10,758 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:11,996 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:10:13,329 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:14,782 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:16,305 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:10:17,843 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:10:19,438 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:10:21,114 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:22,911 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:24,857 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:26,852 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:10:28,978 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:10:30,654 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-07-20 02:10:34,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11134 backedges. 140 proven. 1334 refuted. 0 times theorem prover too weak. 9660 trivial. 0 not checked. [2020-07-20 02:10:34,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237703435] [2020-07-20 02:10:34,418 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:10:34,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931462834] [2020-07-20 02:10:34,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:10:34,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-07-20 02:10:34,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742876032] [2020-07-20 02:10:34,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 02:10:34,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:10:34,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 02:10:34,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-07-20 02:10:34,420 INFO L87 Difference]: Start difference. First operand 410 states and 415 transitions. Second operand 28 states. [2020-07-20 02:11:08,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:11:08,929 INFO L93 Difference]: Finished difference Result 428 states and 437 transitions. [2020-07-20 02:11:08,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 02:11:08,940 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 406 [2020-07-20 02:11:08,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:11:08,942 INFO L225 Difference]: With dead ends: 428 [2020-07-20 02:11:08,942 INFO L226 Difference]: Without dead ends: 426 [2020-07-20 02:11:08,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2020-07-20 02:11:08,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-07-20 02:11:08,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 425. [2020-07-20 02:11:08,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2020-07-20 02:11:08,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 434 transitions. [2020-07-20 02:11:08,959 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 434 transitions. Word has length 406 [2020-07-20 02:11:08,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:11:08,960 INFO L479 AbstractCegarLoop]: Abstraction has 425 states and 434 transitions. [2020-07-20 02:11:08,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 02:11:08,960 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 434 transitions. [2020-07-20 02:11:08,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-07-20 02:11:08,963 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:11:08,963 INFO L422 BasicCegarLoop]: trace histogram [72, 71, 71, 24, 24, 24, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:11:09,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:11:09,176 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:11:09,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:11:09,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1183105016, now seen corresponding path program 46 times [2020-07-20 02:11:09,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:11:09,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740028401] [2020-07-20 02:11:09,178 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:11:09,185 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:11:09,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540420026] [2020-07-20 02:11:09,186 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5a51931e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:11:09,334 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5a51931e issued 4 check-sat command(s) [2020-07-20 02:11:09,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:11:09,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 99 conjunts are in the unsatisfiable core [2020-07-20 02:11:09,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:11:09,573 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:11:10,103 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:11:10,512 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:11:10,975 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:11:11,492 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:11:12,064 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:11:12,674 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:11:13,407 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:11:14,177 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:11:15,044 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:11:15,910 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:11:16,868 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:11:17,878 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:11:18,965 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:11:20,131 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:11:21,395 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:11:22,681 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:11:23,991 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:11:25,381 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:11:26,863 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:11:28,322 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:11:29,863 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:11:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11439 backedges. 142 proven. 1357 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2020-07-20 02:11:32,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740028401] [2020-07-20 02:11:32,649 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:11:32,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540420026] [2020-07-20 02:11:32,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:11:32,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-07-20 02:11:32,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157374661] [2020-07-20 02:11:32,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 02:11:32,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:11:32,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 02:11:32,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-07-20 02:11:32,651 INFO L87 Difference]: Start difference. First operand 425 states and 434 transitions. Second operand 28 states. [2020-07-20 02:12:01,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:12:01,458 INFO L93 Difference]: Finished difference Result 432 states and 440 transitions. [2020-07-20 02:12:01,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 02:12:01,464 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 411 [2020-07-20 02:12:01,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:12:01,466 INFO L225 Difference]: With dead ends: 432 [2020-07-20 02:12:01,466 INFO L226 Difference]: Without dead ends: 427 [2020-07-20 02:12:01,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2020-07-20 02:12:01,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-07-20 02:12:01,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 427. [2020-07-20 02:12:01,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-07-20 02:12:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 432 transitions. [2020-07-20 02:12:01,483 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 432 transitions. Word has length 411 [2020-07-20 02:12:01,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:12:01,484 INFO L479 AbstractCegarLoop]: Abstraction has 427 states and 432 transitions. [2020-07-20 02:12:01,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 02:12:01,484 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 432 transitions. [2020-07-20 02:12:01,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-07-20 02:12:01,487 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:12:01,487 INFO L422 BasicCegarLoop]: trace histogram [74, 73, 73, 25, 25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:12:01,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-07-20 02:12:01,702 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:12:01,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:12:01,703 INFO L82 PathProgramCache]: Analyzing trace with hash 491785402, now seen corresponding path program 47 times [2020-07-20 02:12:01,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:12:01,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375514403] [2020-07-20 02:12:01,703 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:12:01,710 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:12:01,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968741333] [2020-07-20 02:12:01,711 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3e11d5fc 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 02:12:01,860 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3e11d5fc issued 4 check-sat command(s) [2020-07-20 02:12:01,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:12:01,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 153 conjunts are in the unsatisfiable core [2020-07-20 02:12:01,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:12:02,163 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:12:02,627 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:12:03,216 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:12:03,897 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:12:04,658 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:12:05,512 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:12:06,503 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:07,585 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:12:08,720 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:12:09,879 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:11,206 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 02:12:12,682 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:12:14,160 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:12:15,772 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:17,458 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:19,244 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:21,351 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:23,455 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 02:12:25,567 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:27,694 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:12:29,954 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:32,321 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:12:34,950 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:12:37,153 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-07-20 02:12:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12110 backedges. 146 proven. 1452 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2020-07-20 02:12:41,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375514403] [2020-07-20 02:12:41,743 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:12:41,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968741333] [2020-07-20 02:12:41,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:12:41,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-07-20 02:12:41,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712552170] [2020-07-20 02:12:41,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 02:12:41,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:12:41,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 02:12:41,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-07-20 02:12:41,745 INFO L87 Difference]: Start difference. First operand 427 states and 432 transitions. Second operand 29 states. [2020-07-20 02:13:25,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:13:25,442 INFO L93 Difference]: Finished difference Result 445 states and 454 transitions. [2020-07-20 02:13:25,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 02:13:25,449 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 423 [2020-07-20 02:13:25,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:13:25,451 INFO L225 Difference]: With dead ends: 445 [2020-07-20 02:13:25,451 INFO L226 Difference]: Without dead ends: 443 [2020-07-20 02:13:25,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.7s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2020-07-20 02:13:25,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-07-20 02:13:25,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 442. [2020-07-20 02:13:25,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-07-20 02:13:25,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 451 transitions. [2020-07-20 02:13:25,468 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 451 transitions. Word has length 423 [2020-07-20 02:13:25,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:13:25,469 INFO L479 AbstractCegarLoop]: Abstraction has 442 states and 451 transitions. [2020-07-20 02:13:25,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 02:13:25,469 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 451 transitions. [2020-07-20 02:13:25,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2020-07-20 02:13:25,472 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:13:25,473 INFO L422 BasicCegarLoop]: trace histogram [75, 74, 74, 25, 25, 25, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:13:25,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:13:25,688 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:13:25,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:13:25,689 INFO L82 PathProgramCache]: Analyzing trace with hash -2139890675, now seen corresponding path program 48 times [2020-07-20 02:13:25,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:13:25,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594791022] [2020-07-20 02:13:25,690 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:13:25,710 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:13:25,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476269575] [2020-07-20 02:13:25,713 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e6ba768 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:13:25,958 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e6ba768 issued 4 check-sat command(s) [2020-07-20 02:13:25,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:13:25,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 103 conjunts are in the unsatisfiable core [2020-07-20 02:13:25,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:13:26,269 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:26,622 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:27,040 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:27,521 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:28,096 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:13:28,740 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:13:29,444 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:30,226 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:31,044 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:13:31,977 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:13:32,939 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:34,006 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:35,175 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:36,402 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:13:37,788 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:39,174 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:40,514 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:41,912 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:13:43,475 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:45,102 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:13:46,873 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:13:48,469 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:50,208 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:52,052 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:55,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12428 backedges. 148 proven. 1476 refuted. 0 times theorem prover too weak. 10804 trivial. 0 not checked. [2020-07-20 02:13:55,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594791022] [2020-07-20 02:13:55,559 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:13:55,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476269575] [2020-07-20 02:13:55,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:13:55,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-07-20 02:13:55,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885443625] [2020-07-20 02:13:55,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 02:13:55,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:13:55,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 02:13:55,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-07-20 02:13:55,561 INFO L87 Difference]: Start difference. First operand 442 states and 451 transitions. Second operand 29 states. [2020-07-20 02:14:29,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:14:29,612 INFO L93 Difference]: Finished difference Result 449 states and 457 transitions. [2020-07-20 02:14:29,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 02:14:29,620 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 428 [2020-07-20 02:14:29,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:14:29,623 INFO L225 Difference]: With dead ends: 449 [2020-07-20 02:14:29,623 INFO L226 Difference]: Without dead ends: 444 [2020-07-20 02:14:29,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2020-07-20 02:14:29,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2020-07-20 02:14:29,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 444. [2020-07-20 02:14:29,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2020-07-20 02:14:29,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 449 transitions. [2020-07-20 02:14:29,643 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 449 transitions. Word has length 428 [2020-07-20 02:14:29,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:14:29,644 INFO L479 AbstractCegarLoop]: Abstraction has 444 states and 449 transitions. [2020-07-20 02:14:29,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 02:14:29,644 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 449 transitions. [2020-07-20 02:14:29,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2020-07-20 02:14:29,648 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:14:29,648 INFO L422 BasicCegarLoop]: trace histogram [77, 76, 76, 26, 26, 26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:14:29,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:14:29,862 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:14:29,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:14:29,862 INFO L82 PathProgramCache]: Analyzing trace with hash -835407537, now seen corresponding path program 49 times [2020-07-20 02:14:29,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:14:29,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115732690] [2020-07-20 02:14:29,863 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f92eea [2020-07-20 02:14:29,872 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:14:29,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96224852] [2020-07-20 02:14:29,873 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d265e8e 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 02:14:30,161 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d265e8e issued 4 check-sat command(s) [2020-07-20 02:14:30,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:14:30,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 159 conjunts are in the unsatisfiable core [2020-07-20 02:14:30,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:14:30,507 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:14:31,085 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:14:31,869 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 02:14:32,708 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:14:33,585 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:14:34,610 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 02:14:35,744 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-20 02:14:36,994 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:14:38,363 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:14:39,824 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:14:41,472 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:14:43,343 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:14:45,267 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:14:47,187 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:14:49,214 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:14:51,467 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 11