/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_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/ps2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:51:29,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:51:29,697 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:51:29,716 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:51:29,716 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:51:29,718 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:51:29,720 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:51:29,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:51:29,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:51:29,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:51:29,738 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:51:29,740 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:51:29,741 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:51:29,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:51:29,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:51:29,749 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:51:29,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:51:29,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:51:29,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:51:29,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:51:29,760 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:51:29,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:51:29,762 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:51:29,763 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:51:29,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 23:51:29,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:51:29,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:51:29,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:51:29,775 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 [2020-07-19 23:51:29,789 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:51:29,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:51:29,791 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:51:29,791 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:51:29,791 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:51:29,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:51:29,792 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:51:29,792 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:51:29,792 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:51:29,792 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:51:29,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:51:29,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:51:29,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:51:29,793 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:51:29,793 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:51:29,793 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:51:29,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:51:29,794 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:51:29,794 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:51:29,794 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:51:29,794 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:51:29,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:51:29,795 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:51:29,795 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:51:29,795 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:51:29,796 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:51:29,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:51:29,796 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:51:29,796 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:51:29,796 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_FUNCTIONS 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 [2020-07-19 23:51:30,111 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:51:30,124 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:51:30,128 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:51:30,130 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:51:30,130 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:51:30,131 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps2.c [2020-07-19 23:51:30,194 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e99bbf11/de6c573dfc3d460ea1ca1423f427b91c/FLAGcf1b1a05c [2020-07-19 23:51:30,676 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:51:30,677 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps2.c [2020-07-19 23:51:30,684 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e99bbf11/de6c573dfc3d460ea1ca1423f427b91c/FLAGcf1b1a05c [2020-07-19 23:51:31,070 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e99bbf11/de6c573dfc3d460ea1ca1423f427b91c [2020-07-19 23:51:31,080 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:51:31,084 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:51:31,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:51:31,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:51:31,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:51:31,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:51:31" (1/1) ... [2020-07-19 23:51:31,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76b90e4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:51:31, skipping insertion in model container [2020-07-19 23:51:31,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:51:31" (1/1) ... [2020-07-19 23:51:31,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:51:31,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:51:31,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:51:31,304 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:51:31,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:51:31,336 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:51:31,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:51:31 WrapperNode [2020-07-19 23:51:31,336 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:51:31,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:51:31,337 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:51:31,337 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:51:31,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:51:31" (1/1) ... [2020-07-19 23:51:31,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:51:31" (1/1) ... [2020-07-19 23:51:31,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:51:31" (1/1) ... [2020-07-19 23:51:31,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:51:31" (1/1) ... [2020-07-19 23:51:31,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:51:31" (1/1) ... [2020-07-19 23:51:31,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:51:31" (1/1) ... [2020-07-19 23:51:31,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:51:31" (1/1) ... [2020-07-19 23:51:31,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:51:31,448 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:51:31,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:51:31,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:51:31,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:51:31" (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 [2020-07-19 23:51:31,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:51:31,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:51:31,524 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-19 23:51:31,524 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 23:51:31,524 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:51:31,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:51:31,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 23:51:31,526 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-19 23:51:31,526 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-19 23:51:31,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 23:51:31,526 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:51:31,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:51:31,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:51:31,708 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:51:31,708 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-19 23:51:31,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:51:31 BoogieIcfgContainer [2020-07-19 23:51:31,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:51:31,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:51:31,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:51:31,716 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:51:31,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:51:31" (1/3) ... [2020-07-19 23:51:31,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22757f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:51:31, skipping insertion in model container [2020-07-19 23:51:31,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:51:31" (2/3) ... [2020-07-19 23:51:31,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22757f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:51:31, skipping insertion in model container [2020-07-19 23:51:31,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:51:31" (3/3) ... [2020-07-19 23:51:31,719 INFO L109 eAbstractionObserver]: Analyzing ICFG ps2.c [2020-07-19 23:51:31,730 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:51:31,737 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:51:31,751 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:51:31,774 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:51:31,775 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:51:31,775 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:51:31,775 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:51:31,775 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:51:31,775 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:51:31,775 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:51:31,776 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:51:31,794 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-19 23:51:31,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-19 23:51:31,801 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:51:31,802 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:51:31,802 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:51:31,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:51:31,809 INFO L82 PathProgramCache]: Analyzing trace with hash -64610451, now seen corresponding path program 1 times [2020-07-19 23:51:31,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:51:31,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898354] [2020-07-19 23:51:31,817 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:51:31,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:51:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:51:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:51:31,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898354] [2020-07-19 23:51:31,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:51:31,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-19 23:51:31,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808270959] [2020-07-19 23:51:31,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-19 23:51:31,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:51:31,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-19 23:51:31,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-19 23:51:31,940 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-19 23:51:31,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:51:31,964 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-07-19 23:51:31,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-19 23:51:31,966 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-19 23:51:31,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:51:31,975 INFO L225 Difference]: With dead ends: 35 [2020-07-19 23:51:31,975 INFO L226 Difference]: Without dead ends: 15 [2020-07-19 23:51:31,979 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 [2020-07-19 23:51:31,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-19 23:51:32,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-19 23:51:32,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-19 23:51:32,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-19 23:51:32,020 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-07-19 23:51:32,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:51:32,020 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-19 23:51:32,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-19 23:51:32,020 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-19 23:51:32,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-19 23:51:32,021 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:51:32,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:51:32,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:51:32,022 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:51:32,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:51:32,022 INFO L82 PathProgramCache]: Analyzing trace with hash -62822991, now seen corresponding path program 1 times [2020-07-19 23:51:32,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:51:32,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160702151] [2020-07-19 23:51:32,023 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:51:32,031 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:51:32,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1860102826] [2020-07-19 23:51:32,031 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4b59ef29 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:51:32,079 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4b59ef29 issued 3 check-sat command(s) [2020-07-19 23:51:32,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:51:32,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-19 23:51:32,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:51:32,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:51:32,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160702151] [2020-07-19 23:51:32,181 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:51:32,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860102826] [2020-07-19 23:51:32,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:51:32,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:51:32,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949794584] [2020-07-19 23:51:32,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:51:32,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:51:32,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:51:32,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:51:32,185 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-07-19 23:51:32,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:51:32,264 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-07-19 23:51:32,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:51:32,265 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-19 23:51:32,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:51:32,266 INFO L225 Difference]: With dead ends: 25 [2020-07-19 23:51:32,266 INFO L226 Difference]: Without dead ends: 22 [2020-07-19 23:51:32,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:51:32,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-19 23:51:32,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-19 23:51:32,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-19 23:51:32,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-19 23:51:32,280 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-07-19 23:51:32,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:51:32,280 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-19 23:51:32,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:51:32,281 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-19 23:51:32,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-19 23:51:32,282 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:51:32,282 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:51:32,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-19 23:51:32,498 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:51:32,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:51:32,499 INFO L82 PathProgramCache]: Analyzing trace with hash 50868238, now seen corresponding path program 1 times [2020-07-19 23:51:32,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:51:32,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486882836] [2020-07-19 23:51:32,500 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:51:32,507 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:51:32,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607461669] [2020-07-19 23:51:32,508 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d4c4df5 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 [2020-07-19 23:51:32,545 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d4c4df5 issued 4 check-sat command(s) [2020-07-19 23:51:32,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:51:32,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-19 23:51:32,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:51:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:51:32,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486882836] [2020-07-19 23:51:32,631 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:51:32,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607461669] [2020-07-19 23:51:32,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:51:32,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-19 23:51:32,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824050410] [2020-07-19 23:51:32,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 23:51:32,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:51:32,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 23:51:32,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:51:32,634 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-07-19 23:51:32,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:51:32,707 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-07-19 23:51:32,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 23:51:32,708 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-07-19 23:51:32,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:51:32,709 INFO L225 Difference]: With dead ends: 32 [2020-07-19 23:51:32,709 INFO L226 Difference]: Without dead ends: 29 [2020-07-19 23:51:32,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:51:32,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-19 23:51:32,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-19 23:51:32,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-19 23:51:32,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-07-19 23:51:32,718 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2020-07-19 23:51:32,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:51:32,718 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-07-19 23:51:32,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 23:51:32,719 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-07-19 23:51:32,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-19 23:51:32,720 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:51:32,720 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:51:32,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:51:32,936 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:51:32,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:51:32,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1538749201, now seen corresponding path program 2 times [2020-07-19 23:51:32,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:51:32,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679557525] [2020-07-19 23:51:32,939 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:51:32,944 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:51:32,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946448417] [2020-07-19 23:51:32,945 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@738dc467 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:51:32,982 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@738dc467 issued 4 check-sat command(s) [2020-07-19 23:51:32,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:51:32,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-19 23:51:32,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:51:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 23:51:33,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679557525] [2020-07-19 23:51:33,064 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:51:33,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946448417] [2020-07-19 23:51:33,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:51:33,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-19 23:51:33,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110403490] [2020-07-19 23:51:33,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 23:51:33,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:51:33,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 23:51:33,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:51:33,067 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 7 states. [2020-07-19 23:51:33,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:51:33,155 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-07-19 23:51:33,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 23:51:33,156 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-19 23:51:33,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:51:33,157 INFO L225 Difference]: With dead ends: 39 [2020-07-19 23:51:33,157 INFO L226 Difference]: Without dead ends: 36 [2020-07-19 23:51:33,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-19 23:51:33,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-19 23:51:33,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-19 23:51:33,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-19 23:51:33,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-19 23:51:33,168 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 24 [2020-07-19 23:51:33,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:51:33,168 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-19 23:51:33,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 23:51:33,168 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-19 23:51:33,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-19 23:51:33,170 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:51:33,170 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:51:33,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:51:33,384 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:51:33,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:51:33,386 INFO L82 PathProgramCache]: Analyzing trace with hash -695576914, now seen corresponding path program 3 times [2020-07-19 23:51:33,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:51:33,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054135344] [2020-07-19 23:51:33,387 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:51:33,393 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:51:33,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547112503] [2020-07-19 23:51:33,393 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1b087bfb 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 [2020-07-19 23:51:33,444 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1b087bfb issued 4 check-sat command(s) [2020-07-19 23:51:33,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:51:33,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-19 23:51:33,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:51:33,537 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-19 23:51:33,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054135344] [2020-07-19 23:51:33,538 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:51:33,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547112503] [2020-07-19 23:51:33,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:51:33,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-19 23:51:33,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452216434] [2020-07-19 23:51:33,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 23:51:33,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:51:33,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 23:51:33,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-19 23:51:33,543 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 8 states. [2020-07-19 23:51:33,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:51:33,636 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-07-19 23:51:33,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 23:51:33,636 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-07-19 23:51:33,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:51:33,638 INFO L225 Difference]: With dead ends: 46 [2020-07-19 23:51:33,638 INFO L226 Difference]: Without dead ends: 43 [2020-07-19 23:51:33,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:51:33,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-19 23:51:33,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-19 23:51:33,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-19 23:51:33,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-07-19 23:51:33,647 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 31 [2020-07-19 23:51:33,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:51:33,648 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-07-19 23:51:33,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 23:51:33,648 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-07-19 23:51:33,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-19 23:51:33,649 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:51:33,650 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:51:33,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:51:33,864 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:51:33,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:51:33,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1264228465, now seen corresponding path program 4 times [2020-07-19 23:51:33,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:51:33,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004245678] [2020-07-19 23:51:33,865 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:51:33,870 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:51:33,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104619734] [2020-07-19 23:51:33,871 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@eccd95f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:51:33,916 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@eccd95f issued 4 check-sat command(s) [2020-07-19 23:51:33,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:51:33,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-19 23:51:33,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:51:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-19 23:51:34,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004245678] [2020-07-19 23:51:34,039 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:51:34,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104619734] [2020-07-19 23:51:34,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:51:34,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-19 23:51:34,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164941867] [2020-07-19 23:51:34,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 23:51:34,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:51:34,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 23:51:34,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:51:34,042 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 9 states. [2020-07-19 23:51:34,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:51:34,166 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-07-19 23:51:34,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 23:51:34,166 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-07-19 23:51:34,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:51:34,168 INFO L225 Difference]: With dead ends: 53 [2020-07-19 23:51:34,168 INFO L226 Difference]: Without dead ends: 50 [2020-07-19 23:51:34,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:51:34,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-19 23:51:34,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-07-19 23:51:34,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-19 23:51:34,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-07-19 23:51:34,177 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 38 [2020-07-19 23:51:34,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:51:34,178 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-07-19 23:51:34,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 23:51:34,178 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-07-19 23:51:34,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-19 23:51:34,179 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:51:34,180 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:51:34,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-19 23:51:34,381 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:51:34,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:51:34,382 INFO L82 PathProgramCache]: Analyzing trace with hash 427058510, now seen corresponding path program 5 times [2020-07-19 23:51:34,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:51:34,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800626414] [2020-07-19 23:51:34,383 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:51:34,394 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:51:34,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [366669642] [2020-07-19 23:51:34,395 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@613ba65a 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 [2020-07-19 23:51:34,436 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@613ba65a issued 4 check-sat command(s) [2020-07-19 23:51:34,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:51:34,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-19 23:51:34,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:51:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-19 23:51:34,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800626414] [2020-07-19 23:51:34,554 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:51:34,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366669642] [2020-07-19 23:51:34,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:51:34,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-19 23:51:34,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504987281] [2020-07-19 23:51:34,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 23:51:34,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:51:34,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 23:51:34,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:51:34,556 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 10 states. [2020-07-19 23:51:34,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:51:34,755 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-07-19 23:51:34,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 23:51:34,755 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-07-19 23:51:34,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:51:34,757 INFO L225 Difference]: With dead ends: 60 [2020-07-19 23:51:34,757 INFO L226 Difference]: Without dead ends: 57 [2020-07-19 23:51:34,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:51:34,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-19 23:51:34,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-19 23:51:34,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-19 23:51:34,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-19 23:51:34,769 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 45 [2020-07-19 23:51:34,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:51:34,769 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-19 23:51:34,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 23:51:34,770 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-19 23:51:34,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-19 23:51:34,771 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:51:34,771 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:51:34,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:51:34,975 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:51:34,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:51:34,976 INFO L82 PathProgramCache]: Analyzing trace with hash 174118353, now seen corresponding path program 6 times [2020-07-19 23:51:34,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:51:34,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881405029] [2020-07-19 23:51:34,977 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:51:34,983 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:51:34,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29322906] [2020-07-19 23:51:34,984 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4df03aef No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:51:35,036 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4df03aef issued 4 check-sat command(s) [2020-07-19 23:51:35,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:51:35,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-19 23:51:35,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:51:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 12 proven. 57 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-19 23:51:35,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881405029] [2020-07-19 23:51:35,178 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:51:35,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29322906] [2020-07-19 23:51:35,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:51:35,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-19 23:51:35,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579193807] [2020-07-19 23:51:35,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 23:51:35,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:51:35,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 23:51:35,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:51:35,181 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 11 states. [2020-07-19 23:51:35,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:51:35,385 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2020-07-19 23:51:35,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 23:51:35,385 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-07-19 23:51:35,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:51:35,388 INFO L225 Difference]: With dead ends: 67 [2020-07-19 23:51:35,389 INFO L226 Difference]: Without dead ends: 64 [2020-07-19 23:51:35,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-07-19 23:51:35,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-19 23:51:35,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-07-19 23:51:35,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-19 23:51:35,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-07-19 23:51:35,399 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 52 [2020-07-19 23:51:35,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:51:35,399 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-07-19 23:51:35,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 23:51:35,399 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-07-19 23:51:35,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-07-19 23:51:35,401 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:51:35,401 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:51:35,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:51:35,610 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:51:35,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:51:35,611 INFO L82 PathProgramCache]: Analyzing trace with hash 600857582, now seen corresponding path program 7 times [2020-07-19 23:51:35,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:51:35,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910452382] [2020-07-19 23:51:35,612 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:51:35,619 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:51:35,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1755260331] [2020-07-19 23:51:35,619 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1896ebb2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:51:35,674 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1896ebb2 issued 4 check-sat command(s) [2020-07-19 23:51:35,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:51:35,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-19 23:51:35,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:51:35,833 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 14 proven. 77 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-19 23:51:35,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910452382] [2020-07-19 23:51:35,833 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:51:35,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755260331] [2020-07-19 23:51:35,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:51:35,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-19 23:51:35,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379174856] [2020-07-19 23:51:35,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-19 23:51:35,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:51:35,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-19 23:51:35,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-07-19 23:51:35,836 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 12 states. [2020-07-19 23:51:36,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:51:36,025 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-07-19 23:51:36,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-19 23:51:36,025 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2020-07-19 23:51:36,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:51:36,027 INFO L225 Difference]: With dead ends: 74 [2020-07-19 23:51:36,027 INFO L226 Difference]: Without dead ends: 71 [2020-07-19 23:51:36,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-07-19 23:51:36,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-19 23:51:36,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-07-19 23:51:36,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-19 23:51:36,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-07-19 23:51:36,051 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 59 [2020-07-19 23:51:36,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:51:36,052 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-07-19 23:51:36,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-19 23:51:36,052 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-07-19 23:51:36,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-19 23:51:36,055 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:51:36,055 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:51:36,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-19 23:51:36,269 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:51:36,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:51:36,270 INFO L82 PathProgramCache]: Analyzing trace with hash 25176881, now seen corresponding path program 8 times [2020-07-19 23:51:36,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:51:36,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151771944] [2020-07-19 23:51:36,271 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:51:36,277 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:51:36,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972077503] [2020-07-19 23:51:36,277 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@146ac26 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:51:36,327 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@146ac26 issued 4 check-sat command(s) [2020-07-19 23:51:36,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:51:36,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-19 23:51:36,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:51:36,522 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 16 proven. 100 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-07-19 23:51:36,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151771944] [2020-07-19 23:51:36,523 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:51:36,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972077503] [2020-07-19 23:51:36,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:51:36,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-19 23:51:36,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816962401] [2020-07-19 23:51:36,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-19 23:51:36,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:51:36,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-19 23:51:36,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-07-19 23:51:36,529 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 13 states. [2020-07-19 23:51:36,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:51:36,804 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-07-19 23:51:36,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 23:51:36,805 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-07-19 23:51:36,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:51:36,807 INFO L225 Difference]: With dead ends: 81 [2020-07-19 23:51:36,807 INFO L226 Difference]: Without dead ends: 78 [2020-07-19 23:51:36,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-07-19 23:51:36,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-19 23:51:36,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-07-19 23:51:36,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-19 23:51:36,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-07-19 23:51:36,817 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 66 [2020-07-19 23:51:36,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:51:36,817 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-07-19 23:51:36,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-19 23:51:36,818 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-07-19 23:51:36,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-19 23:51:36,819 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:51:36,819 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:51:37,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:51:37,033 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:51:37,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:51:37,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1948793486, now seen corresponding path program 9 times [2020-07-19 23:51:37,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:51:37,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161771587] [2020-07-19 23:51:37,035 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:51:37,040 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:51:37,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218925845] [2020-07-19 23:51:37,041 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1f108d9a 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 [2020-07-19 23:51:37,088 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1f108d9a issued 4 check-sat command(s) [2020-07-19 23:51:37,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:51:37,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 43 conjunts are in the unsatisfiable core [2020-07-19 23:51:37,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:51:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 18 proven. 126 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-07-19 23:51:37,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161771587] [2020-07-19 23:51:37,303 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:51:37,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218925845] [2020-07-19 23:51:37,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:51:37,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-19 23:51:37,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006209458] [2020-07-19 23:51:37,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-19 23:51:37,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:51:37,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-19 23:51:37,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-07-19 23:51:37,306 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 14 states. [2020-07-19 23:51:37,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:51:37,589 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-07-19 23:51:37,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 23:51:37,590 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 73 [2020-07-19 23:51:37,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:51:37,592 INFO L225 Difference]: With dead ends: 88 [2020-07-19 23:51:37,592 INFO L226 Difference]: Without dead ends: 85 [2020-07-19 23:51:37,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:51:37,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-19 23:51:37,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-07-19 23:51:37,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-19 23:51:37,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-07-19 23:51:37,602 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 73 [2020-07-19 23:51:37,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:51:37,603 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-07-19 23:51:37,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-19 23:51:37,603 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-07-19 23:51:37,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-19 23:51:37,604 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:51:37,605 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:51:37,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:51:37,818 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:51:37,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:51:37,819 INFO L82 PathProgramCache]: Analyzing trace with hash 586061969, now seen corresponding path program 10 times [2020-07-19 23:51:37,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:51:37,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037138652] [2020-07-19 23:51:37,820 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:51:37,826 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:51:37,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141320622] [2020-07-19 23:51:37,826 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6b069716 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:51:37,878 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6b069716 issued 4 check-sat command(s) [2020-07-19 23:51:37,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:51:37,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-19 23:51:37,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:51:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-07-19 23:51:38,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037138652] [2020-07-19 23:51:38,146 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:51:38,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141320622] [2020-07-19 23:51:38,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:51:38,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-19 23:51:38,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619845568] [2020-07-19 23:51:38,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 23:51:38,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:51:38,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 23:51:38,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:51:38,149 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 15 states. [2020-07-19 23:51:38,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:51:38,473 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2020-07-19 23:51:38,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 23:51:38,473 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 80 [2020-07-19 23:51:38,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:51:38,474 INFO L225 Difference]: With dead ends: 95 [2020-07-19 23:51:38,475 INFO L226 Difference]: Without dead ends: 92 [2020-07-19 23:51:38,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-07-19 23:51:38,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-19 23:51:38,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-07-19 23:51:38,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-07-19 23:51:38,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2020-07-19 23:51:38,486 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 80 [2020-07-19 23:51:38,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:51:38,486 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2020-07-19 23:51:38,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 23:51:38,486 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2020-07-19 23:51:38,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-07-19 23:51:38,488 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:51:38,488 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:51:38,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-19 23:51:38,700 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:51:38,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:51:38,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1334182190, now seen corresponding path program 11 times [2020-07-19 23:51:38,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:51:38,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126714974] [2020-07-19 23:51:38,702 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:51:38,707 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:51:38,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1431522170] [2020-07-19 23:51:38,707 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@fe78c0d 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 [2020-07-19 23:51:38,762 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@fe78c0d issued 4 check-sat command(s) [2020-07-19 23:51:38,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:51:38,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-19 23:51:38,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:51:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 22 proven. 187 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-19 23:51:39,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126714974] [2020-07-19 23:51:39,083 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:51:39,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431522170] [2020-07-19 23:51:39,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:51:39,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-07-19 23:51:39,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246670158] [2020-07-19 23:51:39,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 23:51:39,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:51:39,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 23:51:39,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-07-19 23:51:39,086 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 16 states. [2020-07-19 23:51:39,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:51:39,501 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-07-19 23:51:39,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-19 23:51:39,501 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-07-19 23:51:39,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:51:39,503 INFO L225 Difference]: With dead ends: 102 [2020-07-19 23:51:39,503 INFO L226 Difference]: Without dead ends: 99 [2020-07-19 23:51:39,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-07-19 23:51:39,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-19 23:51:39,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-07-19 23:51:39,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-19 23:51:39,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-07-19 23:51:39,514 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 87 [2020-07-19 23:51:39,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:51:39,514 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-07-19 23:51:39,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 23:51:39,514 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-07-19 23:51:39,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-19 23:51:39,516 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:51:39,516 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:51:39,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-19 23:51:39,731 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:51:39,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:51:39,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1247944177, now seen corresponding path program 12 times [2020-07-19 23:51:39,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:51:39,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153429600] [2020-07-19 23:51:39,732 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:51:39,736 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:51:39,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132546928] [2020-07-19 23:51:39,737 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4994a51 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:51:39,807 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4994a51 issued 4 check-sat command(s) [2020-07-19 23:51:39,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:51:39,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 55 conjunts are in the unsatisfiable core [2020-07-19 23:51:39,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:51:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 24 proven. 222 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-07-19 23:51:40,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153429600] [2020-07-19 23:51:40,185 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:51:40,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132546928] [2020-07-19 23:51:40,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:51:40,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-19 23:51:40,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269954821] [2020-07-19 23:51:40,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-19 23:51:40,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:51:40,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-19 23:51:40,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-07-19 23:51:40,187 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 17 states. [2020-07-19 23:51:40,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:51:40,632 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2020-07-19 23:51:40,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-19 23:51:40,633 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 94 [2020-07-19 23:51:40,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:51:40,634 INFO L225 Difference]: With dead ends: 109 [2020-07-19 23:51:40,634 INFO L226 Difference]: Without dead ends: 106 [2020-07-19 23:51:40,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-07-19 23:51:40,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-07-19 23:51:40,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-07-19 23:51:40,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-19 23:51:40,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2020-07-19 23:51:40,660 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 94 [2020-07-19 23:51:40,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:51:40,660 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2020-07-19 23:51:40,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-19 23:51:40,661 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2020-07-19 23:51:40,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-07-19 23:51:40,663 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:51:40,663 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:51:40,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-19 23:51:40,878 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:51:40,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:51:40,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1634971598, now seen corresponding path program 13 times [2020-07-19 23:51:40,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:51:40,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736273384] [2020-07-19 23:51:40,880 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:51:40,888 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:51:40,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550228864] [2020-07-19 23:51:40,889 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@19dac705 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 [2020-07-19 23:51:40,973 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@19dac705 issued 4 check-sat command(s) [2020-07-19 23:51:40,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:51:40,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 59 conjunts are in the unsatisfiable core [2020-07-19 23:51:40,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:51:41,412 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 26 proven. 260 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-07-19 23:51:41,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736273384] [2020-07-19 23:51:41,413 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:51:41,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550228864] [2020-07-19 23:51:41,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:51:41,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-19 23:51:41,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938045293] [2020-07-19 23:51:41,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-19 23:51:41,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:51:41,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-19 23:51:41,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-07-19 23:51:41,415 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 18 states. [2020-07-19 23:51:41,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:51:41,923 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2020-07-19 23:51:41,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-19 23:51:41,927 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 101 [2020-07-19 23:51:41,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:51:41,928 INFO L225 Difference]: With dead ends: 116 [2020-07-19 23:51:41,928 INFO L226 Difference]: Without dead ends: 113 [2020-07-19 23:51:41,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-07-19 23:51:41,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-07-19 23:51:41,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-07-19 23:51:41,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-07-19 23:51:41,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2020-07-19 23:51:41,938 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 101 [2020-07-19 23:51:41,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:51:41,938 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2020-07-19 23:51:41,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-19 23:51:41,939 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2020-07-19 23:51:41,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-19 23:51:41,940 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:51:41,940 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:51:42,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:51:42,154 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:51:42,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:51:42,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1659847855, now seen corresponding path program 14 times [2020-07-19 23:51:42,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:51:42,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774069178] [2020-07-19 23:51:42,156 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:51:42,161 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:51:42,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371492581] [2020-07-19 23:51:42,162 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@77195993 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:51:42,225 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@77195993 issued 4 check-sat command(s) [2020-07-19 23:51:42,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:51:42,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-19 23:51:42,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:51:42,721 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 28 proven. 301 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-19 23:51:42,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774069178] [2020-07-19 23:51:42,721 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:51:42,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371492581] [2020-07-19 23:51:42,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:51:42,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-07-19 23:51:42,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907591104] [2020-07-19 23:51:42,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-19 23:51:42,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:51:42,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-19 23:51:42,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-07-19 23:51:42,724 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 19 states. [2020-07-19 23:51:43,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:51:43,342 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2020-07-19 23:51:43,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-19 23:51:43,343 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 108 [2020-07-19 23:51:43,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:51:43,345 INFO L225 Difference]: With dead ends: 123 [2020-07-19 23:51:43,345 INFO L226 Difference]: Without dead ends: 120 [2020-07-19 23:51:43,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-07-19 23:51:43,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-07-19 23:51:43,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-07-19 23:51:43,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-19 23:51:43,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2020-07-19 23:51:43,354 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 108 [2020-07-19 23:51:43,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:51:43,355 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2020-07-19 23:51:43,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-19 23:51:43,355 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2020-07-19 23:51:43,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-07-19 23:51:43,356 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:51:43,357 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:51:43,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-19 23:51:43,561 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:51:43,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:51:43,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1543194222, now seen corresponding path program 15 times [2020-07-19 23:51:43,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:51:43,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100569141] [2020-07-19 23:51:43,563 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:51:43,569 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:51:43,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969481357] [2020-07-19 23:51:43,570 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2aa22fef 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 [2020-07-19 23:51:43,633 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2aa22fef issued 4 check-sat command(s) [2020-07-19 23:51:43,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:51:43,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 67 conjunts are in the unsatisfiable core [2020-07-19 23:51:43,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:51:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 30 proven. 345 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-07-19 23:51:44,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100569141] [2020-07-19 23:51:44,218 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:51:44,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969481357] [2020-07-19 23:51:44,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:51:44,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-07-19 23:51:44,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826581946] [2020-07-19 23:51:44,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-19 23:51:44,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:51:44,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-19 23:51:44,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-07-19 23:51:44,220 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 20 states. [2020-07-19 23:51:45,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:51:45,041 INFO L93 Difference]: Finished difference Result 130 states and 132 transitions. [2020-07-19 23:51:45,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-19 23:51:45,041 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 115 [2020-07-19 23:51:45,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:51:45,043 INFO L225 Difference]: With dead ends: 130 [2020-07-19 23:51:45,044 INFO L226 Difference]: Without dead ends: 127 [2020-07-19 23:51:45,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-07-19 23:51:45,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-19 23:51:45,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-07-19 23:51:45,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-07-19 23:51:45,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2020-07-19 23:51:45,056 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 115 [2020-07-19 23:51:45,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:51:45,057 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2020-07-19 23:51:45,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-19 23:51:45,057 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2020-07-19 23:51:45,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-19 23:51:45,059 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:51:45,059 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:51:45,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-19 23:51:45,274 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:51:45,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:51:45,275 INFO L82 PathProgramCache]: Analyzing trace with hash -374312783, now seen corresponding path program 16 times [2020-07-19 23:51:45,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:51:45,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051494311] [2020-07-19 23:51:45,275 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:51:45,280 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:51:45,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1239515599] [2020-07-19 23:51:45,280 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@25112498 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:51:45,352 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@25112498 issued 4 check-sat command(s) [2020-07-19 23:51:45,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:51:45,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 71 conjunts are in the unsatisfiable core [2020-07-19 23:51:45,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:51:46,064 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 32 proven. 392 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2020-07-19 23:51:46,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051494311] [2020-07-19 23:51:46,065 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:51:46,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239515599] [2020-07-19 23:51:46,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:51:46,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-19 23:51:46,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935063651] [2020-07-19 23:51:46,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-19 23:51:46,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:51:46,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-19 23:51:46,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-07-19 23:51:46,067 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 21 states. [2020-07-19 23:51:46,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:51:46,937 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2020-07-19 23:51:46,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-19 23:51:46,938 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 122 [2020-07-19 23:51:46,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:51:46,941 INFO L225 Difference]: With dead ends: 137 [2020-07-19 23:51:46,941 INFO L226 Difference]: Without dead ends: 134 [2020-07-19 23:51:46,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-07-19 23:51:46,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-19 23:51:46,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2020-07-19 23:51:46,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-19 23:51:46,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2020-07-19 23:51:46,952 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 122 [2020-07-19 23:51:46,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:51:46,952 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2020-07-19 23:51:46,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-19 23:51:46,953 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2020-07-19 23:51:46,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-07-19 23:51:46,954 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:51:46,954 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:51:47,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-19 23:51:47,165 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:51:47,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:51:47,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1750678258, now seen corresponding path program 17 times [2020-07-19 23:51:47,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:51:47,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741532693] [2020-07-19 23:51:47,167 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:51:47,176 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:51:47,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701351071] [2020-07-19 23:51:47,177 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1f5f103 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 [2020-07-19 23:51:47,311 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1f5f103 issued 4 check-sat command(s) [2020-07-19 23:51:47,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:51:47,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 75 conjunts are in the unsatisfiable core [2020-07-19 23:51:47,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:51:48,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 34 proven. 442 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-07-19 23:51:48,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741532693] [2020-07-19 23:51:48,159 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:51:48,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701351071] [2020-07-19 23:51:48,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:51:48,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-07-19 23:51:48,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403523622] [2020-07-19 23:51:48,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-19 23:51:48,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:51:48,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-19 23:51:48,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-07-19 23:51:48,163 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 22 states. [2020-07-19 23:51:49,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:51:49,212 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2020-07-19 23:51:49,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-19 23:51:49,212 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 129 [2020-07-19 23:51:49,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:51:49,215 INFO L225 Difference]: With dead ends: 144 [2020-07-19 23:51:49,215 INFO L226 Difference]: Without dead ends: 141 [2020-07-19 23:51:49,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-07-19 23:51:49,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-07-19 23:51:49,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2020-07-19 23:51:49,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-07-19 23:51:49,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2020-07-19 23:51:49,224 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 129 [2020-07-19 23:51:49,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:51:49,225 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2020-07-19 23:51:49,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-19 23:51:49,225 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2020-07-19 23:51:49,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-19 23:51:49,226 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:51:49,226 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:51:49,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:51:49,439 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:51:49,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:51:49,440 INFO L82 PathProgramCache]: Analyzing trace with hash 142032401, now seen corresponding path program 18 times [2020-07-19 23:51:49,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:51:49,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246099824] [2020-07-19 23:51:49,441 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:51:49,445 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:51:49,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720015891] [2020-07-19 23:51:49,446 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1c0b6efc No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:51:49,517 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1c0b6efc issued 4 check-sat command(s) [2020-07-19 23:51:49,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:51:49,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 79 conjunts are in the unsatisfiable core [2020-07-19 23:51:49,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:51:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 36 proven. 495 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-07-19 23:51:50,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246099824] [2020-07-19 23:51:50,571 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:51:50,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720015891] [2020-07-19 23:51:50,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:51:50,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-19 23:51:50,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357162248] [2020-07-19 23:51:50,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-19 23:51:50,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:51:50,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-19 23:51:50,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-07-19 23:51:50,573 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 23 states. [2020-07-19 23:51:51,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:51:51,800 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2020-07-19 23:51:51,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-19 23:51:51,801 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 136 [2020-07-19 23:51:51,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:51:51,803 INFO L225 Difference]: With dead ends: 151 [2020-07-19 23:51:51,803 INFO L226 Difference]: Without dead ends: 148 [2020-07-19 23:51:51,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-07-19 23:51:51,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-07-19 23:51:51,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2020-07-19 23:51:51,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-07-19 23:51:51,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2020-07-19 23:51:51,813 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 136 [2020-07-19 23:51:51,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:51:51,813 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2020-07-19 23:51:51,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-19 23:51:51,813 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2020-07-19 23:51:51,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-07-19 23:51:51,814 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:51:51,815 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:51:52,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:51:52,021 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:51:52,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:51:52,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1283445842, now seen corresponding path program 19 times [2020-07-19 23:51:52,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:51:52,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144700907] [2020-07-19 23:51:52,023 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:51:52,028 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:51:52,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1370201276] [2020-07-19 23:51:52,029 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5d1e169d 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 [2020-07-19 23:51:52,114 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5d1e169d issued 4 check-sat command(s) [2020-07-19 23:51:52,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:51:52,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 83 conjunts are in the unsatisfiable core [2020-07-19 23:51:52,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:51:53,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 38 proven. 551 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-07-19 23:51:53,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144700907] [2020-07-19 23:51:53,323 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:51:53,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370201276] [2020-07-19 23:51:53,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:51:53,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-07-19 23:51:53,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413398370] [2020-07-19 23:51:53,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-19 23:51:53,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:51:53,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-19 23:51:53,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-07-19 23:51:53,324 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand 24 states. [2020-07-19 23:51:55,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:51:55,140 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2020-07-19 23:51:55,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-19 23:51:55,141 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 143 [2020-07-19 23:51:55,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:51:55,143 INFO L225 Difference]: With dead ends: 158 [2020-07-19 23:51:55,143 INFO L226 Difference]: Without dead ends: 155 [2020-07-19 23:51:55,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2020-07-19 23:51:55,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-19 23:51:55,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2020-07-19 23:51:55,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-07-19 23:51:55,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2020-07-19 23:51:55,159 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 143 [2020-07-19 23:51:55,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:51:55,160 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2020-07-19 23:51:55,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-19 23:51:55,160 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2020-07-19 23:51:55,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-07-19 23:51:55,162 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:51:55,162 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:51:55,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-19 23:51:55,376 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:51:55,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:51:55,377 INFO L82 PathProgramCache]: Analyzing trace with hash 991634289, now seen corresponding path program 20 times [2020-07-19 23:51:55,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:51:55,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330138452] [2020-07-19 23:51:55,377 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:51:55,388 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:51:55,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034553373] [2020-07-19 23:51:55,389 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40138c85 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:51:55,482 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40138c85 issued 4 check-sat command(s) [2020-07-19 23:51:55,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:51:55,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 87 conjunts are in the unsatisfiable core [2020-07-19 23:51:55,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:51:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 40 proven. 610 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2020-07-19 23:51:57,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330138452] [2020-07-19 23:51:57,128 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:51:57,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034553373] [2020-07-19 23:51:57,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:51:57,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-07-19 23:51:57,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016633979] [2020-07-19 23:51:57,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-19 23:51:57,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:51:57,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-19 23:51:57,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-07-19 23:51:57,130 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 25 states. [2020-07-19 23:51:59,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:51:59,083 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2020-07-19 23:51:59,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-19 23:51:59,085 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 150 [2020-07-19 23:51:59,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:51:59,087 INFO L225 Difference]: With dead ends: 165 [2020-07-19 23:51:59,087 INFO L226 Difference]: Without dead ends: 162 [2020-07-19 23:51:59,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-07-19 23:51:59,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-19 23:51:59,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-07-19 23:51:59,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-07-19 23:51:59,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2020-07-19 23:51:59,096 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 150 [2020-07-19 23:51:59,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:51:59,097 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2020-07-19 23:51:59,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-19 23:51:59,097 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2020-07-19 23:51:59,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-07-19 23:51:59,098 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:51:59,098 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:51:59,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-07-19 23:51:59,302 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:51:59,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:51:59,303 INFO L82 PathProgramCache]: Analyzing trace with hash 890337870, now seen corresponding path program 21 times [2020-07-19 23:51:59,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:51:59,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586412503] [2020-07-19 23:51:59,304 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:51:59,317 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:51:59,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194973379] [2020-07-19 23:51:59,318 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@30cfd99b 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 [2020-07-19 23:51:59,405 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@30cfd99b issued 4 check-sat command(s) [2020-07-19 23:51:59,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:51:59,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 91 conjunts are in the unsatisfiable core [2020-07-19 23:51:59,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:52:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 42 proven. 672 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-07-19 23:52:01,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586412503] [2020-07-19 23:52:01,351 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:52:01,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194973379] [2020-07-19 23:52:01,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:52:01,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-07-19 23:52:01,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847537503] [2020-07-19 23:52:01,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-19 23:52:01,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:52:01,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-19 23:52:01,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-07-19 23:52:01,352 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 26 states. [2020-07-19 23:52:03,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:52:03,798 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2020-07-19 23:52:03,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-19 23:52:03,799 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 157 [2020-07-19 23:52:03,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:52:03,801 INFO L225 Difference]: With dead ends: 172 [2020-07-19 23:52:03,801 INFO L226 Difference]: Without dead ends: 169 [2020-07-19 23:52:03,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2020-07-19 23:52:03,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-07-19 23:52:03,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2020-07-19 23:52:03,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-07-19 23:52:03,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2020-07-19 23:52:03,811 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 157 [2020-07-19 23:52:03,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:52:03,812 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2020-07-19 23:52:03,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-19 23:52:03,812 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2020-07-19 23:52:03,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-07-19 23:52:03,813 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:52:03,813 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:52:04,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:52:04,021 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:52:04,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:52:04,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1932386095, now seen corresponding path program 22 times [2020-07-19 23:52:04,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:52:04,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281962609] [2020-07-19 23:52:04,023 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:52:04,027 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:52:04,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270531844] [2020-07-19 23:52:04,028 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3c4ca73 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:52:04,116 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3c4ca73 issued 4 check-sat command(s) [2020-07-19 23:52:04,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:52:04,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 95 conjunts are in the unsatisfiable core [2020-07-19 23:52:04,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:52:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 44 proven. 737 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2020-07-19 23:52:06,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281962609] [2020-07-19 23:52:06,765 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:52:06,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270531844] [2020-07-19 23:52:06,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:52:06,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-07-19 23:52:06,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964413248] [2020-07-19 23:52:06,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-19 23:52:06,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:52:06,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-19 23:52:06,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-07-19 23:52:06,767 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 27 states. [2020-07-19 23:52:10,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:52:10,143 INFO L93 Difference]: Finished difference Result 179 states and 181 transitions. [2020-07-19 23:52:10,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-19 23:52:10,144 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 164 [2020-07-19 23:52:10,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:52:10,146 INFO L225 Difference]: With dead ends: 179 [2020-07-19 23:52:10,146 INFO L226 Difference]: Without dead ends: 176 [2020-07-19 23:52:10,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2020-07-19 23:52:10,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-07-19 23:52:10,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2020-07-19 23:52:10,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-07-19 23:52:10,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2020-07-19 23:52:10,161 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 164 [2020-07-19 23:52:10,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:52:10,161 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2020-07-19 23:52:10,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-19 23:52:10,162 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2020-07-19 23:52:10,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-07-19 23:52:10,165 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:52:10,165 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:52:10,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-07-19 23:52:10,371 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:52:10,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:52:10,372 INFO L82 PathProgramCache]: Analyzing trace with hash 677687534, now seen corresponding path program 23 times [2020-07-19 23:52:10,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:52:10,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833359464] [2020-07-19 23:52:10,372 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:52:10,378 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:52:10,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078951497] [2020-07-19 23:52:10,378 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@70fe2b0f 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 [2020-07-19 23:52:10,460 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@70fe2b0f issued 4 check-sat command(s) [2020-07-19 23:52:10,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:52:10,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 99 conjunts are in the unsatisfiable core [2020-07-19 23:52:10,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:52:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 46 proven. 805 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-07-19 23:52:14,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833359464] [2020-07-19 23:52:14,424 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:52:14,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078951497] [2020-07-19 23:52:14,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:52:14,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-07-19 23:52:14,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136538313] [2020-07-19 23:52:14,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-19 23:52:14,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:52:14,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-19 23:52:14,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-07-19 23:52:14,427 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand 28 states. [2020-07-19 23:52:19,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:52:19,923 INFO L93 Difference]: Finished difference Result 186 states and 188 transitions. [2020-07-19 23:52:19,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-19 23:52:19,924 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 171 [2020-07-19 23:52:19,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:52:19,927 INFO L225 Difference]: With dead ends: 186 [2020-07-19 23:52:19,927 INFO L226 Difference]: Without dead ends: 183 [2020-07-19 23:52:19,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2020-07-19 23:52:19,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-07-19 23:52:19,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2020-07-19 23:52:19,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-07-19 23:52:19,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2020-07-19 23:52:19,938 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 171 [2020-07-19 23:52:19,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:52:19,938 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2020-07-19 23:52:19,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-19 23:52:19,939 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2020-07-19 23:52:19,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-07-19 23:52:19,940 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:52:19,940 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:52:20,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:52:20,153 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:52:20,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:52:20,154 INFO L82 PathProgramCache]: Analyzing trace with hash 844248625, now seen corresponding path program 24 times [2020-07-19 23:52:20,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:52:20,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679812281] [2020-07-19 23:52:20,155 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:52:20,162 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:52:20,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289513540] [2020-07-19 23:52:20,162 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f74660d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:52:20,424 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f74660d issued 4 check-sat command(s) [2020-07-19 23:52:20,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:52:20,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 103 conjunts are in the unsatisfiable core [2020-07-19 23:52:20,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:52:26,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 48 proven. 876 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2020-07-19 23:52:26,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679812281] [2020-07-19 23:52:26,981 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:52:26,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289513540] [2020-07-19 23:52:26,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:52:26,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-07-19 23:52:26,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414049305] [2020-07-19 23:52:26,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-19 23:52:26,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:52:26,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-19 23:52:26,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-07-19 23:52:26,983 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand 29 states. [2020-07-19 23:52:34,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:52:34,508 INFO L93 Difference]: Finished difference Result 193 states and 195 transitions. [2020-07-19 23:52:34,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-19 23:52:34,509 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 178 [2020-07-19 23:52:34,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:52:34,510 INFO L225 Difference]: With dead ends: 193 [2020-07-19 23:52:34,510 INFO L226 Difference]: Without dead ends: 190 [2020-07-19 23:52:34,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2020-07-19 23:52:34,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-07-19 23:52:34,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2020-07-19 23:52:34,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-07-19 23:52:34,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2020-07-19 23:52:34,522 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 178 [2020-07-19 23:52:34,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:52:34,522 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2020-07-19 23:52:34,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-19 23:52:34,522 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2020-07-19 23:52:34,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-07-19 23:52:34,524 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:52:34,524 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:52:34,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-07-19 23:52:34,738 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:52:34,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:52:34,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1073492082, now seen corresponding path program 25 times [2020-07-19 23:52:34,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:52:34,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701948048] [2020-07-19 23:52:34,740 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:52:34,750 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:52:34,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094165278] [2020-07-19 23:52:34,750 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7867dd11 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 [2020-07-19 23:52:34,853 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7867dd11 issued 4 check-sat command(s) [2020-07-19 23:52:34,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:52:34,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 107 conjunts are in the unsatisfiable core [2020-07-19 23:52:34,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:52:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 50 proven. 950 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-07-19 23:52:44,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701948048] [2020-07-19 23:52:44,368 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:52:44,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094165278] [2020-07-19 23:52:44,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:52:44,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-07-19 23:52:44,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399049018] [2020-07-19 23:52:44,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-19 23:52:44,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:52:44,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-19 23:52:44,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-07-19 23:52:44,370 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand 30 states. [2020-07-19 23:52:53,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:52:53,780 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2020-07-19 23:52:53,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-19 23:52:53,781 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 185 [2020-07-19 23:52:53,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:52:53,783 INFO L225 Difference]: With dead ends: 200 [2020-07-19 23:52:53,784 INFO L226 Difference]: Without dead ends: 197 [2020-07-19 23:52:53,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2020-07-19 23:52:53,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-07-19 23:52:53,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2020-07-19 23:52:53,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-07-19 23:52:53,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2020-07-19 23:52:53,795 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 185 [2020-07-19 23:52:53,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:52:53,796 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2020-07-19 23:52:53,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-19 23:52:53,796 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2020-07-19 23:52:53,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-07-19 23:52:53,797 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:52:53,797 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:52:54,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-07-19 23:52:54,000 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:52:54,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:52:54,001 INFO L82 PathProgramCache]: Analyzing trace with hash -372153455, now seen corresponding path program 26 times [2020-07-19 23:52:54,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:52:54,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686480172] [2020-07-19 23:52:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:52:54,006 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:52:54,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524371258] [2020-07-19 23:52:54,007 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@41dc2cbd No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:52:54,103 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@41dc2cbd issued 4 check-sat command(s) [2020-07-19 23:52:54,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:52:54,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 111 conjunts are in the unsatisfiable core [2020-07-19 23:52:54,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:53:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 52 proven. 1027 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2020-07-19 23:53:06,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686480172] [2020-07-19 23:53:06,284 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:53:06,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524371258] [2020-07-19 23:53:06,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:53:06,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-07-19 23:53:06,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357089728] [2020-07-19 23:53:06,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-19 23:53:06,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:53:06,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-19 23:53:06,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-07-19 23:53:06,286 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 31 states. [2020-07-19 23:53:17,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:53:17,108 INFO L93 Difference]: Finished difference Result 207 states and 209 transitions. [2020-07-19 23:53:17,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-19 23:53:17,109 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 192 [2020-07-19 23:53:17,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:53:17,111 INFO L225 Difference]: With dead ends: 207 [2020-07-19 23:53:17,111 INFO L226 Difference]: Without dead ends: 204 [2020-07-19 23:53:17,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2020-07-19 23:53:17,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-07-19 23:53:17,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2020-07-19 23:53:17,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-19 23:53:17,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2020-07-19 23:53:17,123 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 192 [2020-07-19 23:53:17,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:53:17,123 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2020-07-19 23:53:17,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-19 23:53:17,123 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2020-07-19 23:53:17,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-19 23:53:17,125 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:53:17,125 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:53:17,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-07-19 23:53:17,340 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:53:17,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:53:17,340 INFO L82 PathProgramCache]: Analyzing trace with hash -185018834, now seen corresponding path program 27 times [2020-07-19 23:53:17,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:53:17,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113144785] [2020-07-19 23:53:17,341 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:53:17,344 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:53:17,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271997441] [2020-07-19 23:53:17,345 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4427fcd5 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 [2020-07-19 23:53:17,443 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4427fcd5 issued 4 check-sat command(s) [2020-07-19 23:53:17,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:53:17,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 115 conjunts are in the unsatisfiable core [2020-07-19 23:53:17,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:53:31,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 54 proven. 1107 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-07-19 23:53:31,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113144785] [2020-07-19 23:53:31,512 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:53:31,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271997441] [2020-07-19 23:53:31,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:53:31,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-07-19 23:53:31,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675907547] [2020-07-19 23:53:31,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-19 23:53:31,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:53:31,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-19 23:53:31,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-07-19 23:53:31,514 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 32 states. [2020-07-19 23:53:45,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:53:45,846 INFO L93 Difference]: Finished difference Result 214 states and 216 transitions. [2020-07-19 23:53:45,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-19 23:53:45,847 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 199 [2020-07-19 23:53:45,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:53:45,850 INFO L225 Difference]: With dead ends: 214 [2020-07-19 23:53:45,850 INFO L226 Difference]: Without dead ends: 211 [2020-07-19 23:53:45,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2020-07-19 23:53:45,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-07-19 23:53:45,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2020-07-19 23:53:45,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-07-19 23:53:45,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2020-07-19 23:53:45,893 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 199 [2020-07-19 23:53:45,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:53:45,893 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2020-07-19 23:53:45,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-19 23:53:45,894 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2020-07-19 23:53:45,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-07-19 23:53:45,896 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:53:45,896 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:53:46,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-07-19 23:53:46,110 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:53:46,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:53:46,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1527097585, now seen corresponding path program 28 times [2020-07-19 23:53:46,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:53:46,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080871146] [2020-07-19 23:53:46,111 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:53:46,119 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:53:46,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903458027] [2020-07-19 23:53:46,119 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d7bf14b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:53:46,248 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d7bf14b issued 4 check-sat command(s) [2020-07-19 23:53:46,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:53:46,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 119 conjunts are in the unsatisfiable core [2020-07-19 23:53:46,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:54:03,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2758 backedges. 56 proven. 1190 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2020-07-19 23:54:03,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080871146] [2020-07-19 23:54:03,772 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:54:03,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903458027] [2020-07-19 23:54:03,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:54:03,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-07-19 23:54:03,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408484516] [2020-07-19 23:54:03,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-19 23:54:03,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:54:03,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-19 23:54:03,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-07-19 23:54:03,774 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand 33 states. [2020-07-19 23:54:20,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:54:20,579 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2020-07-19 23:54:20,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-19 23:54:20,580 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 206 [2020-07-19 23:54:20,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:54:20,582 INFO L225 Difference]: With dead ends: 221 [2020-07-19 23:54:20,582 INFO L226 Difference]: Without dead ends: 218 [2020-07-19 23:54:20,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2020-07-19 23:54:20,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-07-19 23:54:20,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2020-07-19 23:54:20,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-07-19 23:54:20,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 219 transitions. [2020-07-19 23:54:20,593 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 219 transitions. Word has length 206 [2020-07-19 23:54:20,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:54:20,593 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 219 transitions. [2020-07-19 23:54:20,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-19 23:54:20,594 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 219 transitions. [2020-07-19 23:54:20,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-07-19 23:54:20,595 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:54:20,595 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:54:20,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:54:20,810 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:54:20,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:54:20,811 INFO L82 PathProgramCache]: Analyzing trace with hash 651019470, now seen corresponding path program 29 times [2020-07-19 23:54:20,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:54:20,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780181353] [2020-07-19 23:54:20,812 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:54:20,822 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:54:20,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843876353] [2020-07-19 23:54:20,823 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@663461e1 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 [2020-07-19 23:54:21,391 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@663461e1 issued 4 check-sat command(s) [2020-07-19 23:54:21,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:54:21,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 123 conjunts are in the unsatisfiable core [2020-07-19 23:54:21,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:54:22,334 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:54:22,680 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:54:40,545 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:54:42,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 58 proven. 1276 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2020-07-19 23:54:42,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780181353] [2020-07-19 23:54:42,753 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:54:42,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843876353] [2020-07-19 23:54:42,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:54:42,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-07-19 23:54:42,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365976622] [2020-07-19 23:54:42,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-19 23:54:42,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:54:42,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-19 23:54:42,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-07-19 23:54:42,755 INFO L87 Difference]: Start difference. First operand 218 states and 219 transitions. Second operand 34 states. [2020-07-19 23:55:02,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:55:02,878 INFO L93 Difference]: Finished difference Result 228 states and 230 transitions. [2020-07-19 23:55:02,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-19 23:55:02,879 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 213 [2020-07-19 23:55:02,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:55:02,889 INFO L225 Difference]: With dead ends: 228 [2020-07-19 23:55:02,890 INFO L226 Difference]: Without dead ends: 225 [2020-07-19 23:55:02,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2020-07-19 23:55:02,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-07-19 23:55:02,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2020-07-19 23:55:02,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-07-19 23:55:02,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2020-07-19 23:55:02,902 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 213 [2020-07-19 23:55:02,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:55:02,902 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2020-07-19 23:55:02,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-19 23:55:02,903 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2020-07-19 23:55:02,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-07-19 23:55:02,904 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:55:02,904 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:55:03,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:55:03,120 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:55:03,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:55:03,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1998915153, now seen corresponding path program 30 times [2020-07-19 23:55:03,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:55:03,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843643037] [2020-07-19 23:55:03,121 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:55:03,127 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:55:03,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [196638168] [2020-07-19 23:55:03,128 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@747fffc1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:55:03,431 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@747fffc1 issued 4 check-sat command(s) [2020-07-19 23:55:03,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:55:03,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 127 conjunts are in the unsatisfiable core [2020-07-19 23:55:03,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:55:03,859 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-07-19 23:55:04,123 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:55:04,430 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-19 23:55:04,774 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:55:05,173 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 23:55:05,615 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:55:06,081 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:55:06,598 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:55:07,168 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:55:07,768 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:55:08,399 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:55:09,071 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:55:09,786 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:55:10,551 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:55:13,891 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:55:14,862 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:55:15,900 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:55:16,956 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:55:19,137 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:55:20,369 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:55:21,613 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:55:23,083 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 23:55:24,337 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:55:25,727 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:55:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3165 backedges. 60 proven. 1365 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2020-07-19 23:55:28,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843643037] [2020-07-19 23:55:28,241 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:55:28,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196638168] [2020-07-19 23:55:28,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:55:28,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-07-19 23:55:28,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432910302] [2020-07-19 23:55:28,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-19 23:55:28,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:55:28,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-19 23:55:28,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-07-19 23:55:28,242 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand 35 states. [2020-07-19 23:55:49,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:55:49,933 INFO L93 Difference]: Finished difference Result 235 states and 237 transitions. [2020-07-19 23:55:49,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-19 23:55:49,937 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 220 [2020-07-19 23:55:49,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:55:49,939 INFO L225 Difference]: With dead ends: 235 [2020-07-19 23:55:49,939 INFO L226 Difference]: Without dead ends: 232 [2020-07-19 23:55:49,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2020-07-19 23:55:49,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-07-19 23:55:49,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2020-07-19 23:55:49,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-19 23:55:49,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2020-07-19 23:55:49,951 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 220 [2020-07-19 23:55:49,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:55:49,952 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2020-07-19 23:55:49,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-19 23:55:49,952 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2020-07-19 23:55:49,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-07-19 23:55:49,953 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:55:49,953 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:55:50,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:55:50,154 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:55:50,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:55:50,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1148413074, now seen corresponding path program 31 times [2020-07-19 23:55:50,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:55:50,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39104167] [2020-07-19 23:55:50,156 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:55:50,161 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:55:50,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621874292] [2020-07-19 23:55:50,161 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@580ec55b 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 [2020-07-19 23:55:50,265 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@580ec55b issued 4 check-sat command(s) [2020-07-19 23:55:50,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:55:50,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 131 conjunts are in the unsatisfiable core [2020-07-19 23:55:50,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:55:50,652 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-07-19 23:55:51,233 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-19 23:55:51,604 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-19 23:55:52,398 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:55:52,864 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:55:53,379 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:55:53,926 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:55:54,521 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:55:55,173 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-19 23:55:55,848 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:55:56,577 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:55:57,332 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:55:58,130 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:55:58,989 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:55:59,907 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:56:00,849 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:56:01,813 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:56:02,825 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:56:04,894 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:56:06,039 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:56:07,270 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:56:08,540 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:56:09,834 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:56:11,182 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:56:12,529 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:56:13,926 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:56:16,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3379 backedges. 62 proven. 1457 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-19 23:56:16,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39104167] [2020-07-19 23:56:16,488 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:56:16,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621874292] [2020-07-19 23:56:16,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:56:16,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-07-19 23:56:16,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991970896] [2020-07-19 23:56:16,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-19 23:56:16,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:56:16,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-19 23:56:16,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-07-19 23:56:16,490 INFO L87 Difference]: Start difference. First operand 232 states and 233 transitions. Second operand 36 states. [2020-07-19 23:56:40,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:56:40,314 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2020-07-19 23:56:40,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-19 23:56:40,319 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 227 [2020-07-19 23:56:40,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:56:40,321 INFO L225 Difference]: With dead ends: 242 [2020-07-19 23:56:40,321 INFO L226 Difference]: Without dead ends: 239 [2020-07-19 23:56:40,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2020-07-19 23:56:40,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-07-19 23:56:40,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2020-07-19 23:56:40,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-07-19 23:56:40,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 240 transitions. [2020-07-19 23:56:40,334 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 240 transitions. Word has length 227 [2020-07-19 23:56:40,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:56:40,334 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 240 transitions. [2020-07-19 23:56:40,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-19 23:56:40,334 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 240 transitions. [2020-07-19 23:56:40,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-07-19 23:56:40,336 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:56:40,336 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:56:40,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-07-19 23:56:40,545 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:56:40,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:56:40,546 INFO L82 PathProgramCache]: Analyzing trace with hash -656049231, now seen corresponding path program 32 times [2020-07-19 23:56:40,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:56:40,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699095886] [2020-07-19 23:56:40,546 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:56:40,552 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:56:40,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [591822232] [2020-07-19 23:56:40,553 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@139bd5df No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:56:40,663 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@139bd5df issued 4 check-sat command(s) [2020-07-19 23:56:40,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:56:40,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 135 conjunts are in the unsatisfiable core [2020-07-19 23:56:40,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:56:41,100 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-07-19 23:56:41,397 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-19 23:56:42,074 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:56:42,905 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:56:43,386 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:56:43,909 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:56:44,489 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:56:45,122 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:56:45,850 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:56:46,642 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:56:47,451 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:56:48,314 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:56:49,310 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 23:56:50,191 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:56:51,134 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:56:52,156 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:56:53,223 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:56:54,322 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:56:55,496 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:56:56,692 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:56:57,920 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:56:59,236 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:57:00,552 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:57:02,102 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 23:57:03,554 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:57:05,036 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:57:06,562 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:57:08,127 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:57:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 64 proven. 1552 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2020-07-19 23:57:10,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699095886] [2020-07-19 23:57:10,933 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:57:10,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591822232] [2020-07-19 23:57:10,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:57:10,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-07-19 23:57:10,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389736855] [2020-07-19 23:57:10,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-19 23:57:10,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:57:10,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-19 23:57:10,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-07-19 23:57:10,935 INFO L87 Difference]: Start difference. First operand 239 states and 240 transitions. Second operand 37 states. [2020-07-19 23:57:38,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:57:38,570 INFO L93 Difference]: Finished difference Result 249 states and 251 transitions. [2020-07-19 23:57:38,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-19 23:57:38,571 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 234 [2020-07-19 23:57:38,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:57:38,573 INFO L225 Difference]: With dead ends: 249 [2020-07-19 23:57:38,573 INFO L226 Difference]: Without dead ends: 246 [2020-07-19 23:57:38,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2020-07-19 23:57:38,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-07-19 23:57:38,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2020-07-19 23:57:38,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-07-19 23:57:38,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 247 transitions. [2020-07-19 23:57:38,585 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 247 transitions. Word has length 234 [2020-07-19 23:57:38,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:57:38,586 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 247 transitions. [2020-07-19 23:57:38,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-19 23:57:38,586 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 247 transitions. [2020-07-19 23:57:38,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-19 23:57:38,587 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:57:38,587 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:57:38,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:57:38,801 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:57:38,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:57:38,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1077978610, now seen corresponding path program 33 times [2020-07-19 23:57:38,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:57:38,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477913543] [2020-07-19 23:57:38,802 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:57:38,808 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:57:38,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034858501] [2020-07-19 23:57:38,809 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5462d1f2 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 [2020-07-19 23:57:38,928 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5462d1f2 issued 4 check-sat command(s) [2020-07-19 23:57:38,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:57:38,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 139 conjunts are in the unsatisfiable core [2020-07-19 23:57:38,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:57:39,183 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:57:39,756 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:57:40,475 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:57:40,917 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:57:41,411 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:57:41,950 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:57:42,533 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:57:43,164 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:57:43,853 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:57:44,581 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:57:45,354 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:57:46,184 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:57:47,057 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:57:48,082 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 23:57:49,150 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 23:57:50,207 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:57:51,328 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:57:52,472 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:57:53,602 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:57:54,781 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:57:56,028 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:57:57,382 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:57:58,776 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:58:00,176 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:58:01,617 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:58:03,126 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:58:04,700 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:58:06,294 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:58:07,933 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:58:09,580 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:58:12,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 66 proven. 1650 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2020-07-19 23:58:12,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477913543] [2020-07-19 23:58:12,682 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:58:12,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034858501] [2020-07-19 23:58:12,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:58:12,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-07-19 23:58:12,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314587572] [2020-07-19 23:58:12,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-19 23:58:12,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:58:12,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-19 23:58:12,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-07-19 23:58:12,684 INFO L87 Difference]: Start difference. First operand 246 states and 247 transitions. Second operand 38 states. [2020-07-19 23:58:44,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:58:44,521 INFO L93 Difference]: Finished difference Result 256 states and 258 transitions. [2020-07-19 23:58:44,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-19 23:58:44,522 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 241 [2020-07-19 23:58:44,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:58:44,524 INFO L225 Difference]: With dead ends: 256 [2020-07-19 23:58:44,525 INFO L226 Difference]: Without dead ends: 253 [2020-07-19 23:58:44,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.4s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2020-07-19 23:58:44,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-07-19 23:58:44,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2020-07-19 23:58:44,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-07-19 23:58:44,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 254 transitions. [2020-07-19 23:58:44,536 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 254 transitions. Word has length 241 [2020-07-19 23:58:44,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:58:44,536 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 254 transitions. [2020-07-19 23:58:44,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-19 23:58:44,536 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 254 transitions. [2020-07-19 23:58:44,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-07-19 23:58:44,538 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:58:44,538 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:58:44,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-07-19 23:58:44,742 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:58:44,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:58:44,743 INFO L82 PathProgramCache]: Analyzing trace with hash 612174097, now seen corresponding path program 34 times [2020-07-19 23:58:44,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:58:44,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602421189] [2020-07-19 23:58:44,744 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-19 23:58:44,749 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:58:44,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244949017] [2020-07-19 23:58:44,749 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1cf78d6 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:58:45,250 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1cf78d6 issued 4 check-sat command(s) [2020-07-19 23:58:45,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:58:45,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 143 conjunts are in the unsatisfiable core [2020-07-19 23:58:45,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:58:45,686 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-07-19 23:58:46,004 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-19 23:58:46,363 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:58:46,777 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:58:47,244 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:58:47,752 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:58:48,302 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:58:48,913 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:58:49,559 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:58:50,266 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 23:58:51,057 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:58:51,868 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:58:52,722 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:58:53,664 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 23:58:54,699 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:58:55,752 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:58:56,863 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:58:57,968 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:58:59,121 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:59:00,379 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:59:01,617 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:59:02,953 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:59:04,492 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 23:59:06,077 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:59:07,635 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-19 23:59:09,183 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:59:10,745 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:59:12,371 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:59:14,220 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-19 23:59:16,418 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 23:59:18,198 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:59:20,040 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-19 23:59:23,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4063 backedges. 68 proven. 1751 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2020-07-19 23:59:23,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602421189] [2020-07-19 23:59:23,385 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:59:23,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244949017] [2020-07-19 23:59:23,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:59:23,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-07-19 23:59:23,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122784409] [2020-07-19 23:59:23,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-19 23:59:23,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:59:23,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-19 23:59:23,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-07-19 23:59:23,386 INFO L87 Difference]: Start difference. First operand 253 states and 254 transitions. Second operand 39 states. [2020-07-20 00:00:00,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:00:00,379 INFO L93 Difference]: Finished difference Result 263 states and 265 transitions. [2020-07-20 00:00:00,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-20 00:00:00,380 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 248 [2020-07-20 00:00:00,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:00:00,382 INFO L225 Difference]: With dead ends: 263 [2020-07-20 00:00:00,382 INFO L226 Difference]: Without dead ends: 260 [2020-07-20 00:00:00,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.8s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 00:00:00,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-07-20 00:00:00,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2020-07-20 00:00:00,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-07-20 00:00:00,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 261 transitions. [2020-07-20 00:00:00,394 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 261 transitions. Word has length 248 [2020-07-20 00:00:00,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:00:00,394 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 261 transitions. [2020-07-20 00:00:00,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-20 00:00:00,395 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 261 transitions. [2020-07-20 00:00:00,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 00:00:00,396 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:00:00,396 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:00:00,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 00:00:00,601 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:00:00,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:00:00,601 INFO L82 PathProgramCache]: Analyzing trace with hash -2039480146, now seen corresponding path program 35 times [2020-07-20 00:00:00,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:00:00,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012876301] [2020-07-20 00:00:00,602 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-20 00:00:00,607 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 00:00:00,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727148736] [2020-07-20 00:00:00,608 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79071e57 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 00:00:00,714 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79071e57 issued 4 check-sat command(s) [2020-07-20 00:00:00,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 00:00:00,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 147 conjunts are in the unsatisfiable core [2020-07-20 00:00:00,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 00:00:00,942 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 00:00:01,546 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 00:00:01,953 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 00:00:02,415 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 00:00:02,927 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:00:03,500 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:00:04,130 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:00:04,830 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:00:05,565 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 00:00:06,351 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:00:07,194 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:00:08,085 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:00:09,018 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:00:10,052 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:00:11,171 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:00:12,310 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:00:13,657 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 00:00:14,870 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:00:16,329 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 00:00:17,978 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 00:00:19,820 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 00:00:21,318 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:00:22,865 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:00:24,454 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:00:26,083 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:00:27,794 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:00:29,572 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:00:31,406 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:00:33,378 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:00:35,475 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:00:37,443 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:00:39,507 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:00:41,622 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:00:45,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 70 proven. 1855 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2020-07-20 00:00:45,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012876301] [2020-07-20 00:00:45,397 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 00:00:45,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727148736] [2020-07-20 00:00:45,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 00:00:45,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-07-20 00:00:45,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416241422] [2020-07-20 00:00:45,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-20 00:00:45,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:00:45,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-20 00:00:45,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 00:00:45,399 INFO L87 Difference]: Start difference. First operand 260 states and 261 transitions. Second operand 40 states. [2020-07-20 00:01:28,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:01:28,827 INFO L93 Difference]: Finished difference Result 270 states and 272 transitions. [2020-07-20 00:01:28,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-20 00:01:28,833 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 255 [2020-07-20 00:01:28,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:01:28,834 INFO L225 Difference]: With dead ends: 270 [2020-07-20 00:01:28,834 INFO L226 Difference]: Without dead ends: 267 [2020-07-20 00:01:28,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.5s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 00:01:28,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-07-20 00:01:28,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2020-07-20 00:01:28,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-07-20 00:01:28,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 268 transitions. [2020-07-20 00:01:28,845 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 268 transitions. Word has length 255 [2020-07-20 00:01:28,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:01:28,846 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 268 transitions. [2020-07-20 00:01:28,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-20 00:01:28,846 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 268 transitions. [2020-07-20 00:01:28,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-07-20 00:01:28,848 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:01:28,848 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:01:29,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-07-20 00:01:29,062 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:01:29,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:01:29,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1738649201, now seen corresponding path program 36 times [2020-07-20 00:01:29,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:01:29,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626027552] [2020-07-20 00:01:29,064 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-20 00:01:29,068 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 00:01:29,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272098549] [2020-07-20 00:01:29,069 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@623b4ac1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 00:01:29,183 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@623b4ac1 issued 4 check-sat command(s) [2020-07-20 00:01:29,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 00:01:29,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 151 conjunts are in the unsatisfiable core [2020-07-20 00:01:29,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 00:01:29,443 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 00:01:29,765 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-07-20 00:01:30,144 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:01:30,581 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 00:01:31,078 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:01:31,633 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:01:32,270 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:01:32,936 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:01:33,674 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:01:34,496 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:01:35,421 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:01:36,395 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:01:37,436 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 00:01:38,593 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 00:01:39,770 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 00:01:40,936 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 00:01:42,246 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:01:43,507 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:01:44,864 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:01:46,442 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:01:48,153 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:01:49,722 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:01:51,409 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 00:01:53,152 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 00:01:54,991 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 00:01:57,066 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 00:01:59,093 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:02:01,013 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:02:02,955 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:02:04,992 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:02:07,271 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 00:02:09,528 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:02:11,806 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:02:14,387 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:02:16,830 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:02:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4554 backedges. 72 proven. 1962 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2020-07-20 00:02:21,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626027552] [2020-07-20 00:02:21,178 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 00:02:21,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272098549] [2020-07-20 00:02:21,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 00:02:21,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-07-20 00:02:21,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447145590] [2020-07-20 00:02:21,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-20 00:02:21,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:02:21,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-20 00:02:21,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 00:02:21,181 INFO L87 Difference]: Start difference. First operand 267 states and 268 transitions. Second operand 41 states. [2020-07-20 00:03:11,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:03:11,791 INFO L93 Difference]: Finished difference Result 277 states and 279 transitions. [2020-07-20 00:03:11,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-07-20 00:03:11,792 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 262 [2020-07-20 00:03:11,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:03:11,794 INFO L225 Difference]: With dead ends: 277 [2020-07-20 00:03:11,795 INFO L226 Difference]: Without dead ends: 274 [2020-07-20 00:03:11,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.9s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 00:03:11,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-07-20 00:03:11,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2020-07-20 00:03:11,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-07-20 00:03:11,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 275 transitions. [2020-07-20 00:03:11,806 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 275 transitions. Word has length 262 [2020-07-20 00:03:11,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:03:11,807 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 275 transitions. [2020-07-20 00:03:11,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-20 00:03:11,807 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 275 transitions. [2020-07-20 00:03:11,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-07-20 00:03:11,808 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:03:11,808 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:03:12,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-07-20 00:03:12,013 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:03:12,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:03:12,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1227394894, now seen corresponding path program 37 times [2020-07-20 00:03:12,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:03:12,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463459935] [2020-07-20 00:03:12,014 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-20 00:03:12,020 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 00:03:12,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285752536] [2020-07-20 00:03:12,020 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5999099f 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 00:03:12,136 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5999099f issued 4 check-sat command(s) [2020-07-20 00:03:12,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 00:03:12,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 155 conjunts are in the unsatisfiable core [2020-07-20 00:03:12,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 00:03:12,406 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 00:03:12,772 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:03:13,253 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:03:13,792 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 00:03:14,386 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 00:03:15,090 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:03:15,902 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:03:16,695 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:03:17,567 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:03:18,532 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:03:19,578 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:03:20,631 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:03:21,836 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:03:22,981 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:03:24,388 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 00:03:25,835 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 00:03:27,148 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:03:28,551 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:03:30,016 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:03:31,543 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:03:33,129 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:03:34,900 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:03:36,635 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:03:38,453 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:03:40,426 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:03:42,492 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:03:44,593 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:03:46,721 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:03:48,909 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:03:51,559 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 00:03:53,983 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:03:56,575 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:03:59,195 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:04:01,781 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:04:04,439 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:04:07,292 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 00:04:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4810 backedges. 74 proven. 2072 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2020-07-20 00:04:12,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463459935] [2020-07-20 00:04:12,357 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 00:04:12,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285752536] [2020-07-20 00:04:12,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 00:04:12,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-07-20 00:04:12,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664072689] [2020-07-20 00:04:12,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-20 00:04:12,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:04:12,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-20 00:04:12,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 00:04:12,359 INFO L87 Difference]: Start difference. First operand 274 states and 275 transitions. Second operand 42 states. [2020-07-20 00:05:13,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:05:13,982 INFO L93 Difference]: Finished difference Result 284 states and 286 transitions. [2020-07-20 00:05:13,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-20 00:05:13,982 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 269 [2020-07-20 00:05:13,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:05:13,984 INFO L225 Difference]: With dead ends: 284 [2020-07-20 00:05:13,985 INFO L226 Difference]: Without dead ends: 281 [2020-07-20 00:05:13,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.3s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2020-07-20 00:05:13,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-07-20 00:05:13,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2020-07-20 00:05:13,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-07-20 00:05:13,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 282 transitions. [2020-07-20 00:05:13,998 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 282 transitions. Word has length 269 [2020-07-20 00:05:13,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:05:13,999 INFO L479 AbstractCegarLoop]: Abstraction has 281 states and 282 transitions. [2020-07-20 00:05:13,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-07-20 00:05:13,999 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 282 transitions. [2020-07-20 00:05:14,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-07-20 00:05:14,001 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:05:14,001 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:05:14,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-07-20 00:05:14,216 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:05:14,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:05:14,216 INFO L82 PathProgramCache]: Analyzing trace with hash 2039049169, now seen corresponding path program 38 times [2020-07-20 00:05:14,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:05:14,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027306771] [2020-07-20 00:05:14,217 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d0e2477 [2020-07-20 00:05:14,222 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 00:05:14,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167007107] [2020-07-20 00:05:14,222 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6d3dd168 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 00:05:14,339 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6d3dd168 issued 4 check-sat command(s) [2020-07-20 00:05:14,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 00:05:14,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 159 conjunts are in the unsatisfiable core [2020-07-20 00:05:14,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 00:05:14,724 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:05:15,109 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:05:15,668 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:05:16,255 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:05:17,021 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:05:17,758 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:05:18,628 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 00:05:19,520 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 8