/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/ps2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 02:00:53,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 02:00:53,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 02:00:53,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 02:00:53,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 02:00:53,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 02:00:53,569 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 02:00:53,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 02:00:53,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 02:00:53,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 02:00:53,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 02:00:53,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 02:00:53,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 02:00:53,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 02:00:53,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 02:00:53,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 02:00:53,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 02:00:53,581 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 02:00:53,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 02:00:53,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 02:00:53,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 02:00:53,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 02:00:53,588 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 02:00:53,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 02:00:53,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 02:00:53,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 02:00:53,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 02:00:53,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 02:00:53,604 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 02:00:53,620 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 02:00:53,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 02:00:53,622 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 02:00:53,622 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 02:00:53,622 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 02:00:53,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 02:00:53,623 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 02:00:53,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 02:00:53,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 02:00:53,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 02:00:53,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 02:00:53,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 02:00:53,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 02:00:53,624 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 02:00:53,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 02:00:53,624 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 02:00:53,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 02:00:53,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 02:00:53,625 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 02:00:53,625 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 02:00:53,625 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 02:00:53,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 02:00:53,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 02:00:53,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 02:00:53,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 02:00:53,626 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 02:00:53,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 02:00:53,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 02:00:53,627 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 02:00:53,627 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 02:00:53,924 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 02:00:53,944 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 02:00:53,947 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 02:00:53,949 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 02:00:53,951 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 02:00:53,953 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps2.c [2020-07-20 02:00:54,034 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/365db5f13/b8bbd54d968c4946b88d56f227a22547/FLAG07ccd3b30 [2020-07-20 02:00:54,499 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 02:00:54,500 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps2.c [2020-07-20 02:00:54,508 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/365db5f13/b8bbd54d968c4946b88d56f227a22547/FLAG07ccd3b30 [2020-07-20 02:00:54,883 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/365db5f13/b8bbd54d968c4946b88d56f227a22547 [2020-07-20 02:00:54,894 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 02:00:54,897 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 02:00:54,898 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 02:00:54,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 02:00:54,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 02:00:54,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:00:54" (1/1) ... [2020-07-20 02:00:54,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bd08649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:00:54, skipping insertion in model container [2020-07-20 02:00:54,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:00:54" (1/1) ... [2020-07-20 02:00:54,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 02:00:54,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 02:00:55,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 02:00:55,114 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 02:00:55,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 02:00:55,144 INFO L208 MainTranslator]: Completed translation [2020-07-20 02:00:55,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:00:55 WrapperNode [2020-07-20 02:00:55,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 02:00:55,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 02:00:55,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 02:00:55,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 02:00:55,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:00:55" (1/1) ... [2020-07-20 02:00:55,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:00:55" (1/1) ... [2020-07-20 02:00:55,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:00:55" (1/1) ... [2020-07-20 02:00:55,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:00:55" (1/1) ... [2020-07-20 02:00:55,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:00:55" (1/1) ... [2020-07-20 02:00:55,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:00:55" (1/1) ... [2020-07-20 02:00:55,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:00:55" (1/1) ... [2020-07-20 02:00:55,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 02:00:55,267 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 02:00:55,267 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 02:00:55,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 02:00:55,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:00:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 02:00:55,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 02:00:55,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 02:00:55,343 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 02:00:55,343 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 02:00:55,343 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 02:00:55,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 02:00:55,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 02:00:55,344 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 02:00:55,344 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 02:00:55,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 02:00:55,344 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 02:00:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 02:00:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 02:00:55,539 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 02:00:55,540 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 02:00:55,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:00:55 BoogieIcfgContainer [2020-07-20 02:00:55,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 02:00:55,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 02:00:55,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 02:00:55,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 02:00:55,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:00:54" (1/3) ... [2020-07-20 02:00:55,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530ee80c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:00:55, skipping insertion in model container [2020-07-20 02:00:55,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:00:55" (2/3) ... [2020-07-20 02:00:55,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530ee80c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:00:55, skipping insertion in model container [2020-07-20 02:00:55,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:00:55" (3/3) ... [2020-07-20 02:00:55,552 INFO L109 eAbstractionObserver]: Analyzing ICFG ps2.c [2020-07-20 02:00:55,563 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 02:00:55,572 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 02:00:55,587 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 02:00:55,611 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 02:00:55,611 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 02:00:55,611 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 02:00:55,611 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 02:00:55,611 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 02:00:55,612 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 02:00:55,612 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 02:00:55,612 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 02:00:55,629 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 02:00:55,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 02:00:55,635 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:55,636 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:55,636 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:55,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:55,644 INFO L82 PathProgramCache]: Analyzing trace with hash -64610451, now seen corresponding path program 1 times [2020-07-20 02:00:55,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:55,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635253071] [2020-07-20 02:00:55,655 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:00:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:00:55,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:00:55,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:00:55,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635253071] [2020-07-20 02:00:55,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:00:55,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 02:00:55,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68493140] [2020-07-20 02:00:55,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 02:00:55,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:55,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 02:00:55,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 02:00:55,791 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-20 02:00:55,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:55,818 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-07-20 02:00:55,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 02:00:55,820 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 02:00:55,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:55,831 INFO L225 Difference]: With dead ends: 35 [2020-07-20 02:00:55,831 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 02:00:55,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 02:00:55,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 02:00:55,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 02:00:55,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 02:00:55,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-20 02:00:55,883 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-07-20 02:00:55,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:55,884 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-20 02:00:55,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 02:00:55,884 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-20 02:00:55,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 02:00:55,885 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:55,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:55,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 02:00:55,886 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:55,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:55,886 INFO L82 PathProgramCache]: Analyzing trace with hash -62822991, now seen corresponding path program 1 times [2020-07-20 02:00:55,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:55,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589442023] [2020-07-20 02:00:55,888 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:00:55,896 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:55,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124130533] [2020-07-20 02:00:55,897 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@67cd3b26 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:55,949 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@67cd3b26 issued 3 check-sat command(s) [2020-07-20 02:00:55,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:55,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 02:00:55,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:56,135 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2020-07-20 02:00:56,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:00:56,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589442023] [2020-07-20 02:00:56,218 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:56,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124130533] [2020-07-20 02:00:56,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:00:56,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:00:56,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909214530] [2020-07-20 02:00:56,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:00:56,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:56,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:00:56,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:00:56,228 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-07-20 02:00:56,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:56,341 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-07-20 02:00:56,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 02:00:56,342 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-20 02:00:56,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:56,344 INFO L225 Difference]: With dead ends: 25 [2020-07-20 02:00:56,344 INFO L226 Difference]: Without dead ends: 22 [2020-07-20 02:00:56,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:00:56,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-20 02:00:56,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-20 02:00:56,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-20 02:00:56,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-20 02:00:56,361 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-07-20 02:00:56,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:56,363 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-20 02:00:56,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 02:00:56,363 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-20 02:00:56,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 02:00:56,365 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:56,365 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:56,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 02:00:56,583 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:56,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:56,584 INFO L82 PathProgramCache]: Analyzing trace with hash 50868238, now seen corresponding path program 1 times [2020-07-20 02:00:56,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:56,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569200973] [2020-07-20 02:00:56,585 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:00:56,591 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:56,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332399150] [2020-07-20 02:00:56,592 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@706d4581 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:56,641 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@706d4581 issued 4 check-sat command(s) [2020-07-20 02:00:56,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:56,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 02:00:56,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:00:56,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569200973] [2020-07-20 02:00:56,707 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:56,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332399150] [2020-07-20 02:00:56,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:56,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-20 02:00:56,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775365846] [2020-07-20 02:00:56,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 02:00:56,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:56,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 02:00:56,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:00:56,710 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-07-20 02:00:56,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:56,782 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-07-20 02:00:56,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 02:00:56,783 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-07-20 02:00:56,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:56,784 INFO L225 Difference]: With dead ends: 32 [2020-07-20 02:00:56,784 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 02:00:56,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 02:00:56,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 02:00:56,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-20 02:00:56,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 02:00:56,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-07-20 02:00:56,793 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2020-07-20 02:00:56,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:56,793 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-07-20 02:00:56,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 02:00:56,794 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-07-20 02:00:56,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 02:00:56,795 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:56,795 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:57,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:57,010 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:57,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:57,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1538749201, now seen corresponding path program 2 times [2020-07-20 02:00:57,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:57,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432084237] [2020-07-20 02:00:57,013 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:00:57,021 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:57,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1084994865] [2020-07-20 02:00:57,022 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6647e074 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:57,066 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6647e074 issued 4 check-sat command(s) [2020-07-20 02:00:57,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:57,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 02:00:57,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 02:00:57,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432084237] [2020-07-20 02:00:57,154 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:57,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084994865] [2020-07-20 02:00:57,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:57,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-20 02:00:57,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585201382] [2020-07-20 02:00:57,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 02:00:57,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:57,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 02:00:57,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 02:00:57,157 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 7 states. [2020-07-20 02:00:57,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:57,248 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-07-20 02:00:57,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 02:00:57,249 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-20 02:00:57,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:57,251 INFO L225 Difference]: With dead ends: 39 [2020-07-20 02:00:57,251 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 02:00:57,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 02:00:57,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 02:00:57,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 02:00:57,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 02:00:57,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-20 02:00:57,261 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 24 [2020-07-20 02:00:57,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:57,261 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-20 02:00:57,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 02:00:57,262 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-20 02:00:57,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 02:00:57,263 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:57,263 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:57,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:57,478 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:57,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:57,479 INFO L82 PathProgramCache]: Analyzing trace with hash -695576914, now seen corresponding path program 3 times [2020-07-20 02:00:57,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:57,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841931189] [2020-07-20 02:00:57,479 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:00:57,485 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:57,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664971804] [2020-07-20 02:00:57,486 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2e710383 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:57,550 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2e710383 issued 4 check-sat command(s) [2020-07-20 02:00:57,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:57,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 02:00:57,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:57,667 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 02:00:57,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841931189] [2020-07-20 02:00:57,669 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:57,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664971804] [2020-07-20 02:00:57,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:57,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 02:00:57,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176559354] [2020-07-20 02:00:57,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 02:00:57,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:57,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 02:00:57,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-20 02:00:57,672 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 8 states. [2020-07-20 02:00:57,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:57,785 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-07-20 02:00:57,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 02:00:57,786 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-07-20 02:00:57,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:57,787 INFO L225 Difference]: With dead ends: 46 [2020-07-20 02:00:57,788 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 02:00:57,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-20 02:00:57,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 02:00:57,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-20 02:00:57,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 02:00:57,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-07-20 02:00:57,797 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 31 [2020-07-20 02:00:57,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:57,797 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-07-20 02:00:57,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 02:00:57,798 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-07-20 02:00:57,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 02:00:57,799 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:57,799 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:58,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:58,007 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:58,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:58,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1264228465, now seen corresponding path program 4 times [2020-07-20 02:00:58,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:58,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935346813] [2020-07-20 02:00:58,009 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:00:58,026 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:58,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1672962843] [2020-07-20 02:00:58,026 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5f0c5817 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:58,071 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5f0c5817 issued 4 check-sat command(s) [2020-07-20 02:00:58,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:58,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 02:00:58,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:58,174 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-20 02:00:58,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935346813] [2020-07-20 02:00:58,175 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:58,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672962843] [2020-07-20 02:00:58,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:58,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 02:00:58,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449056854] [2020-07-20 02:00:58,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 02:00:58,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:58,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 02:00:58,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 02:00:58,177 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 9 states. [2020-07-20 02:00:58,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:58,298 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-07-20 02:00:58,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 02:00:58,299 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-07-20 02:00:58,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:58,301 INFO L225 Difference]: With dead ends: 53 [2020-07-20 02:00:58,301 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 02:00:58,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-20 02:00:58,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 02:00:58,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-07-20 02:00:58,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 02:00:58,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-07-20 02:00:58,310 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 38 [2020-07-20 02:00:58,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:58,311 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-07-20 02:00:58,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 02:00:58,311 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-07-20 02:00:58,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 02:00:58,313 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:58,313 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:58,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 02:00:58,529 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:58,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:58,529 INFO L82 PathProgramCache]: Analyzing trace with hash 427058510, now seen corresponding path program 5 times [2020-07-20 02:00:58,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:58,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920830741] [2020-07-20 02:00:58,530 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:00:58,536 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:58,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1178802255] [2020-07-20 02:00:58,536 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58a3e8c6 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:58,578 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58a3e8c6 issued 4 check-sat command(s) [2020-07-20 02:00:58,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:58,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 02:00:58,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:58,696 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 02:00:58,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920830741] [2020-07-20 02:00:58,697 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:58,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178802255] [2020-07-20 02:00:58,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:58,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-20 02:00:58,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024557868] [2020-07-20 02:00:58,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 02:00:58,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:58,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 02:00:58,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-07-20 02:00:58,700 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 10 states. [2020-07-20 02:00:58,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:58,855 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-07-20 02:00:58,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 02:00:58,856 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-07-20 02:00:58,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:58,857 INFO L225 Difference]: With dead ends: 60 [2020-07-20 02:00:58,858 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 02:00:58,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-07-20 02:00:58,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 02:00:58,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-20 02:00:58,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 02:00:58,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-20 02:00:58,868 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 45 [2020-07-20 02:00:58,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:58,869 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-20 02:00:58,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 02:00:58,869 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-20 02:00:58,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 02:00:58,871 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:58,871 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:59,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:59,086 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:59,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:59,086 INFO L82 PathProgramCache]: Analyzing trace with hash 174118353, now seen corresponding path program 6 times [2020-07-20 02:00:59,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:59,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083128222] [2020-07-20 02:00:59,088 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:00:59,094 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:59,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657488669] [2020-07-20 02:00:59,094 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2956c0d9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:59,147 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2956c0d9 issued 4 check-sat command(s) [2020-07-20 02:00:59,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:59,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-20 02:00:59,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 12 proven. 57 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-20 02:00:59,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083128222] [2020-07-20 02:00:59,306 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:59,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657488669] [2020-07-20 02:00:59,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:59,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-20 02:00:59,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013102767] [2020-07-20 02:00:59,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 02:00:59,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:59,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 02:00:59,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-07-20 02:00:59,308 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 11 states. [2020-07-20 02:00:59,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:00:59,492 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2020-07-20 02:00:59,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 02:00:59,493 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-07-20 02:00:59,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:00:59,494 INFO L225 Difference]: With dead ends: 67 [2020-07-20 02:00:59,495 INFO L226 Difference]: Without dead ends: 64 [2020-07-20 02:00:59,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-07-20 02:00:59,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-20 02:00:59,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-07-20 02:00:59,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 02:00:59,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-07-20 02:00:59,514 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 52 [2020-07-20 02:00:59,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:00:59,515 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-07-20 02:00:59,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 02:00:59,515 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-07-20 02:00:59,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-07-20 02:00:59,520 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:00:59,520 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:00:59,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:59,736 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:00:59,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:00:59,737 INFO L82 PathProgramCache]: Analyzing trace with hash 600857582, now seen corresponding path program 7 times [2020-07-20 02:00:59,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:00:59,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005485757] [2020-07-20 02:00:59,739 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:00:59,745 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:00:59,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544815308] [2020-07-20 02:00:59,746 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@752dd392 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:00:59,792 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@752dd392 issued 4 check-sat command(s) [2020-07-20 02:00:59,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:00:59,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-20 02:00:59,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:00:59,976 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 14 proven. 77 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-20 02:00:59,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005485757] [2020-07-20 02:00:59,977 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:00:59,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544815308] [2020-07-20 02:00:59,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:00:59,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-20 02:00:59,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322086459] [2020-07-20 02:00:59,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 02:00:59,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:00:59,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 02:00:59,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-07-20 02:00:59,986 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 12 states. [2020-07-20 02:01:00,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:00,197 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-07-20 02:01:00,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 02:01:00,199 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2020-07-20 02:01:00,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:00,200 INFO L225 Difference]: With dead ends: 74 [2020-07-20 02:01:00,200 INFO L226 Difference]: Without dead ends: 71 [2020-07-20 02:01:00,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-07-20 02:01:00,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-20 02:01:00,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-07-20 02:01:00,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-20 02:01:00,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-07-20 02:01:00,218 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 59 [2020-07-20 02:01:00,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:00,219 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-07-20 02:01:00,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 02:01:00,219 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-07-20 02:01:00,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-20 02:01:00,220 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:00,220 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:00,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-20 02:01:00,429 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:00,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:00,430 INFO L82 PathProgramCache]: Analyzing trace with hash 25176881, now seen corresponding path program 8 times [2020-07-20 02:01:00,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:00,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431169251] [2020-07-20 02:01:00,431 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:01:00,436 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:00,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729167078] [2020-07-20 02:01:00,436 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@608e3c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:00,486 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@608e3c issued 4 check-sat command(s) [2020-07-20 02:01:00,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:00,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-20 02:01:00,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:00,663 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 16 proven. 100 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-07-20 02:01:00,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431169251] [2020-07-20 02:01:00,664 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:00,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729167078] [2020-07-20 02:01:00,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:00,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-20 02:01:00,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569176164] [2020-07-20 02:01:00,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 02:01:00,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:00,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 02:01:00,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-07-20 02:01:00,666 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 13 states. [2020-07-20 02:01:00,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:00,940 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-07-20 02:01:00,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 02:01:00,941 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-07-20 02:01:00,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:00,942 INFO L225 Difference]: With dead ends: 81 [2020-07-20 02:01:00,942 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 02:01:00,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-07-20 02:01:00,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 02:01:00,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-07-20 02:01:00,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-20 02:01:00,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-07-20 02:01:00,952 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 66 [2020-07-20 02:01:00,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:00,952 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-07-20 02:01:00,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 02:01:00,953 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-07-20 02:01:00,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-20 02:01:00,956 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:00,956 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:01,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:01,158 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:01,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:01,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1948793486, now seen corresponding path program 9 times [2020-07-20 02:01:01,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:01,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119467060] [2020-07-20 02:01:01,160 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:01:01,165 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:01,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097854542] [2020-07-20 02:01:01,166 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@12cab197 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:01,243 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@12cab197 issued 4 check-sat command(s) [2020-07-20 02:01:01,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:01,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 43 conjunts are in the unsatisfiable core [2020-07-20 02:01:01,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 18 proven. 126 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-07-20 02:01:01,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119467060] [2020-07-20 02:01:01,462 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:01,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097854542] [2020-07-20 02:01:01,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:01,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-20 02:01:01,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170890769] [2020-07-20 02:01:01,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 02:01:01,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:01,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 02:01:01,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-07-20 02:01:01,464 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 14 states. [2020-07-20 02:01:01,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:01,787 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-07-20 02:01:01,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 02:01:01,788 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 73 [2020-07-20 02:01:01,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:01,791 INFO L225 Difference]: With dead ends: 88 [2020-07-20 02:01:01,792 INFO L226 Difference]: Without dead ends: 85 [2020-07-20 02:01:01,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-07-20 02:01:01,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-20 02:01:01,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-07-20 02:01:01,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-20 02:01:01,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-07-20 02:01:01,806 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 73 [2020-07-20 02:01:01,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:01,807 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-07-20 02:01:01,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 02:01:01,807 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-07-20 02:01:01,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-20 02:01:01,808 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:01,808 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:02,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:02,019 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:02,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:02,020 INFO L82 PathProgramCache]: Analyzing trace with hash 586061969, now seen corresponding path program 10 times [2020-07-20 02:01:02,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:02,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765232629] [2020-07-20 02:01:02,021 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:01:02,026 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:02,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728512917] [2020-07-20 02:01:02,027 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@32898f36 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:02,097 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@32898f36 issued 4 check-sat command(s) [2020-07-20 02:01:02,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:02,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-20 02:01:02,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-07-20 02:01:02,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765232629] [2020-07-20 02:01:02,384 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:02,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728512917] [2020-07-20 02:01:02,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:02,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-20 02:01:02,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792985015] [2020-07-20 02:01:02,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 02:01:02,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:02,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 02:01:02,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-07-20 02:01:02,387 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 15 states. [2020-07-20 02:01:02,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:02,719 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2020-07-20 02:01:02,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 02:01:02,719 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 80 [2020-07-20 02:01:02,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:02,721 INFO L225 Difference]: With dead ends: 95 [2020-07-20 02:01:02,721 INFO L226 Difference]: Without dead ends: 92 [2020-07-20 02:01:02,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-07-20 02:01:02,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-20 02:01:02,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-07-20 02:01:02,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-07-20 02:01:02,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2020-07-20 02:01:02,737 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 80 [2020-07-20 02:01:02,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:02,737 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2020-07-20 02:01:02,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 02:01:02,738 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2020-07-20 02:01:02,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-07-20 02:01:02,739 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:02,739 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:02,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-20 02:01:02,955 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:02,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:02,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1334182190, now seen corresponding path program 11 times [2020-07-20 02:01:02,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:02,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555448512] [2020-07-20 02:01:02,957 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:01:02,962 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:02,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1301335401] [2020-07-20 02:01:02,963 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5cfd01c6 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:03,018 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5cfd01c6 issued 4 check-sat command(s) [2020-07-20 02:01:03,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:03,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-20 02:01:03,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 22 proven. 187 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-20 02:01:03,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555448512] [2020-07-20 02:01:03,347 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:03,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301335401] [2020-07-20 02:01:03,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:03,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-07-20 02:01:03,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311037410] [2020-07-20 02:01:03,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 02:01:03,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:03,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 02:01:03,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-07-20 02:01:03,349 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 16 states. [2020-07-20 02:01:03,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:03,774 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-07-20 02:01:03,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 02:01:03,775 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-07-20 02:01:03,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:03,776 INFO L225 Difference]: With dead ends: 102 [2020-07-20 02:01:03,776 INFO L226 Difference]: Without dead ends: 99 [2020-07-20 02:01:03,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-07-20 02:01:03,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-20 02:01:03,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-07-20 02:01:03,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-20 02:01:03,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-07-20 02:01:03,794 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 87 [2020-07-20 02:01:03,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:03,795 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-07-20 02:01:03,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 02:01:03,795 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-07-20 02:01:03,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-20 02:01:03,798 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:03,799 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:03,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-20 02:01:04,000 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:04,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:04,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1247944177, now seen corresponding path program 12 times [2020-07-20 02:01:04,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:04,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681587338] [2020-07-20 02:01:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:01:04,006 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:04,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800204990] [2020-07-20 02:01:04,007 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66d5a52e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:04,067 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66d5a52e issued 4 check-sat command(s) [2020-07-20 02:01:04,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:04,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 55 conjunts are in the unsatisfiable core [2020-07-20 02:01:04,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 24 proven. 222 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-07-20 02:01:04,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681587338] [2020-07-20 02:01:04,446 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:04,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800204990] [2020-07-20 02:01:04,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:04,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-20 02:01:04,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066798324] [2020-07-20 02:01:04,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 02:01:04,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:04,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 02:01:04,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-07-20 02:01:04,448 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 17 states. [2020-07-20 02:01:04,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:04,920 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2020-07-20 02:01:04,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 02:01:04,920 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 94 [2020-07-20 02:01:04,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:04,922 INFO L225 Difference]: With dead ends: 109 [2020-07-20 02:01:04,922 INFO L226 Difference]: Without dead ends: 106 [2020-07-20 02:01:04,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-07-20 02:01:04,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-07-20 02:01:04,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-07-20 02:01:04,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-20 02:01:04,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2020-07-20 02:01:04,931 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 94 [2020-07-20 02:01:04,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:04,931 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2020-07-20 02:01:04,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 02:01:04,931 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2020-07-20 02:01:04,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-07-20 02:01:04,933 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:04,933 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:05,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-20 02:01:05,146 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:05,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:05,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1634971598, now seen corresponding path program 13 times [2020-07-20 02:01:05,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:05,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633074343] [2020-07-20 02:01:05,148 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:01:05,153 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:05,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916722256] [2020-07-20 02:01:05,154 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15dc60e2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:05,225 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15dc60e2 issued 4 check-sat command(s) [2020-07-20 02:01:05,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:05,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 59 conjunts are in the unsatisfiable core [2020-07-20 02:01:05,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:05,668 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 26 proven. 260 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-07-20 02:01:05,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633074343] [2020-07-20 02:01:05,669 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:05,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916722256] [2020-07-20 02:01:05,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:05,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-20 02:01:05,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004742943] [2020-07-20 02:01:05,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 02:01:05,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:05,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 02:01:05,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-07-20 02:01:05,671 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 18 states. [2020-07-20 02:01:06,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:06,197 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2020-07-20 02:01:06,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 02:01:06,199 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 101 [2020-07-20 02:01:06,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:06,200 INFO L225 Difference]: With dead ends: 116 [2020-07-20 02:01:06,200 INFO L226 Difference]: Without dead ends: 113 [2020-07-20 02:01:06,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-07-20 02:01:06,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-07-20 02:01:06,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-07-20 02:01:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-07-20 02:01:06,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2020-07-20 02:01:06,209 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 101 [2020-07-20 02:01:06,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:06,209 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2020-07-20 02:01:06,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 02:01:06,209 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2020-07-20 02:01:06,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-20 02:01:06,210 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:06,211 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:06,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:06,426 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:06,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:06,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1659847855, now seen corresponding path program 14 times [2020-07-20 02:01:06,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:06,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855104535] [2020-07-20 02:01:06,428 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:01:06,433 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:06,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355006741] [2020-07-20 02:01:06,433 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@10b0b3c4 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:06,500 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@10b0b3c4 issued 4 check-sat command(s) [2020-07-20 02:01:06,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:06,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-20 02:01:06,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:07,007 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 28 proven. 301 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-20 02:01:07,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855104535] [2020-07-20 02:01:07,008 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:07,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355006741] [2020-07-20 02:01:07,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:07,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-07-20 02:01:07,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553800356] [2020-07-20 02:01:07,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 02:01:07,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:07,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 02:01:07,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-07-20 02:01:07,010 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 19 states. [2020-07-20 02:01:07,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:07,630 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2020-07-20 02:01:07,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 02:01:07,631 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 108 [2020-07-20 02:01:07,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:07,633 INFO L225 Difference]: With dead ends: 123 [2020-07-20 02:01:07,633 INFO L226 Difference]: Without dead ends: 120 [2020-07-20 02:01:07,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-07-20 02:01:07,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-07-20 02:01:07,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-07-20 02:01:07,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-20 02:01:07,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2020-07-20 02:01:07,642 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 108 [2020-07-20 02:01:07,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:07,643 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2020-07-20 02:01:07,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 02:01:07,643 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2020-07-20 02:01:07,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-07-20 02:01:07,644 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:07,644 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:07,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-20 02:01:07,858 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:07,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:07,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1543194222, now seen corresponding path program 15 times [2020-07-20 02:01:07,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:07,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073803773] [2020-07-20 02:01:07,860 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:01:07,865 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:07,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252723710] [2020-07-20 02:01:07,865 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1f8cea44 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:07,930 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1f8cea44 issued 4 check-sat command(s) [2020-07-20 02:01:07,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:07,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 67 conjunts are in the unsatisfiable core [2020-07-20 02:01:07,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 30 proven. 345 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-07-20 02:01:08,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073803773] [2020-07-20 02:01:08,513 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:08,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252723710] [2020-07-20 02:01:08,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:08,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-07-20 02:01:08,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860432432] [2020-07-20 02:01:08,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 02:01:08,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:08,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 02:01:08,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-07-20 02:01:08,515 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 20 states. [2020-07-20 02:01:09,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:09,243 INFO L93 Difference]: Finished difference Result 130 states and 132 transitions. [2020-07-20 02:01:09,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 02:01:09,243 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 115 [2020-07-20 02:01:09,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:09,246 INFO L225 Difference]: With dead ends: 130 [2020-07-20 02:01:09,246 INFO L226 Difference]: Without dead ends: 127 [2020-07-20 02:01:09,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-07-20 02:01:09,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-20 02:01:09,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-07-20 02:01:09,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-07-20 02:01:09,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2020-07-20 02:01:09,260 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 115 [2020-07-20 02:01:09,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:09,260 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2020-07-20 02:01:09,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 02:01:09,261 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2020-07-20 02:01:09,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-20 02:01:09,262 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:09,262 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:09,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-20 02:01:09,477 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:09,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:09,478 INFO L82 PathProgramCache]: Analyzing trace with hash -374312783, now seen corresponding path program 16 times [2020-07-20 02:01:09,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:09,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833858403] [2020-07-20 02:01:09,478 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:01:09,485 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:09,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942538108] [2020-07-20 02:01:09,486 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65dfd4bd No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:09,566 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65dfd4bd issued 4 check-sat command(s) [2020-07-20 02:01:09,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:09,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 71 conjunts are in the unsatisfiable core [2020-07-20 02:01:09,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:10,281 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 32 proven. 392 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2020-07-20 02:01:10,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833858403] [2020-07-20 02:01:10,281 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:10,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942538108] [2020-07-20 02:01:10,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:10,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-20 02:01:10,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113533152] [2020-07-20 02:01:10,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 02:01:10,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:10,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 02:01:10,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-07-20 02:01:10,283 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 21 states. [2020-07-20 02:01:11,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:11,084 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2020-07-20 02:01:11,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 02:01:11,085 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 122 [2020-07-20 02:01:11,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:11,087 INFO L225 Difference]: With dead ends: 137 [2020-07-20 02:01:11,088 INFO L226 Difference]: Without dead ends: 134 [2020-07-20 02:01:11,089 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 [2020-07-20 02:01:11,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-20 02:01:11,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2020-07-20 02:01:11,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-20 02:01:11,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2020-07-20 02:01:11,097 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 122 [2020-07-20 02:01:11,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:11,097 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2020-07-20 02:01:11,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 02:01:11,098 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2020-07-20 02:01:11,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-07-20 02:01:11,099 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:11,099 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:11,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-20 02:01:11,315 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:11,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:11,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1750678258, now seen corresponding path program 17 times [2020-07-20 02:01:11,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:11,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616590560] [2020-07-20 02:01:11,317 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:01:11,322 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:11,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385532829] [2020-07-20 02:01:11,323 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2056baad No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:11,451 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2056baad issued 4 check-sat command(s) [2020-07-20 02:01:11,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:11,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 75 conjunts are in the unsatisfiable core [2020-07-20 02:01:11,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:12,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 34 proven. 442 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-07-20 02:01:12,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616590560] [2020-07-20 02:01:12,300 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:12,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385532829] [2020-07-20 02:01:12,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:12,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-07-20 02:01:12,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845710292] [2020-07-20 02:01:12,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 02:01:12,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:12,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 02:01:12,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-07-20 02:01:12,303 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 22 states. [2020-07-20 02:01:13,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:13,335 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2020-07-20 02:01:13,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 02:01:13,337 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 129 [2020-07-20 02:01:13,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:13,338 INFO L225 Difference]: With dead ends: 144 [2020-07-20 02:01:13,339 INFO L226 Difference]: Without dead ends: 141 [2020-07-20 02:01:13,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-07-20 02:01:13,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-07-20 02:01:13,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2020-07-20 02:01:13,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-07-20 02:01:13,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2020-07-20 02:01:13,348 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 129 [2020-07-20 02:01:13,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:13,348 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2020-07-20 02:01:13,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 02:01:13,349 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2020-07-20 02:01:13,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-20 02:01:13,350 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:13,350 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:13,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:13,564 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:13,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:13,565 INFO L82 PathProgramCache]: Analyzing trace with hash 142032401, now seen corresponding path program 18 times [2020-07-20 02:01:13,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:13,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396259243] [2020-07-20 02:01:13,566 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:01:13,570 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:13,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [555832714] [2020-07-20 02:01:13,571 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1dd70e9f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:13,635 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1dd70e9f issued 4 check-sat command(s) [2020-07-20 02:01:13,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:13,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 79 conjunts are in the unsatisfiable core [2020-07-20 02:01:13,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:14,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 36 proven. 495 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-07-20 02:01:14,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396259243] [2020-07-20 02:01:14,624 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:14,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555832714] [2020-07-20 02:01:14,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:14,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-20 02:01:14,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494229832] [2020-07-20 02:01:14,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 02:01:14,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:14,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 02:01:14,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-07-20 02:01:14,628 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 23 states. [2020-07-20 02:01:15,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:15,819 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2020-07-20 02:01:15,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 02:01:15,819 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 136 [2020-07-20 02:01:15,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:15,821 INFO L225 Difference]: With dead ends: 151 [2020-07-20 02:01:15,822 INFO L226 Difference]: Without dead ends: 148 [2020-07-20 02:01:15,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-07-20 02:01:15,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-07-20 02:01:15,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2020-07-20 02:01:15,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-07-20 02:01:15,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2020-07-20 02:01:15,830 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 136 [2020-07-20 02:01:15,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:15,831 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2020-07-20 02:01:15,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 02:01:15,831 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2020-07-20 02:01:15,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-07-20 02:01:15,832 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:15,832 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:16,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:16,035 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:16,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:16,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1283445842, now seen corresponding path program 19 times [2020-07-20 02:01:16,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:16,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961202051] [2020-07-20 02:01:16,038 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:01:16,049 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:16,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076900809] [2020-07-20 02:01:16,050 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e4e0cfd No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:16,125 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e4e0cfd issued 4 check-sat command(s) [2020-07-20 02:01:16,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:16,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 83 conjunts are in the unsatisfiable core [2020-07-20 02:01:16,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:17,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 38 proven. 551 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-07-20 02:01:17,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961202051] [2020-07-20 02:01:17,368 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:17,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076900809] [2020-07-20 02:01:17,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:17,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-07-20 02:01:17,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447661439] [2020-07-20 02:01:17,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 02:01:17,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:17,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 02:01:17,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-07-20 02:01:17,370 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand 24 states. [2020-07-20 02:01:19,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:19,075 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2020-07-20 02:01:19,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 02:01:19,076 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 143 [2020-07-20 02:01:19,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:19,078 INFO L225 Difference]: With dead ends: 158 [2020-07-20 02:01:19,078 INFO L226 Difference]: Without dead ends: 155 [2020-07-20 02:01:19,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2020-07-20 02:01:19,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-20 02:01:19,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2020-07-20 02:01:19,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-07-20 02:01:19,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2020-07-20 02:01:19,093 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 143 [2020-07-20 02:01:19,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:19,093 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2020-07-20 02:01:19,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 02:01:19,094 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2020-07-20 02:01:19,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-07-20 02:01:19,097 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:19,097 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:19,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-20 02:01:19,311 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:19,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:19,311 INFO L82 PathProgramCache]: Analyzing trace with hash 991634289, now seen corresponding path program 20 times [2020-07-20 02:01:19,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:19,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344120792] [2020-07-20 02:01:19,312 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:01:19,326 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:19,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024061475] [2020-07-20 02:01:19,326 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@368b9c1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:19,455 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@368b9c1 issued 4 check-sat command(s) [2020-07-20 02:01:19,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:19,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 87 conjunts are in the unsatisfiable core [2020-07-20 02:01:19,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 40 proven. 610 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2020-07-20 02:01:20,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344120792] [2020-07-20 02:01:20,887 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:20,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024061475] [2020-07-20 02:01:20,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:20,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-07-20 02:01:20,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462261052] [2020-07-20 02:01:20,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 02:01:20,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:20,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 02:01:20,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-07-20 02:01:20,888 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 25 states. [2020-07-20 02:01:22,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:22,489 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2020-07-20 02:01:22,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 02:01:22,491 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 150 [2020-07-20 02:01:22,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:22,492 INFO L225 Difference]: With dead ends: 165 [2020-07-20 02:01:22,492 INFO L226 Difference]: Without dead ends: 162 [2020-07-20 02:01:22,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-07-20 02:01:22,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-20 02:01:22,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-07-20 02:01:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-07-20 02:01:22,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2020-07-20 02:01:22,501 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 150 [2020-07-20 02:01:22,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:22,501 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2020-07-20 02:01:22,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 02:01:22,501 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2020-07-20 02:01:22,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-07-20 02:01:22,502 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:22,503 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:22,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-07-20 02:01:22,712 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:22,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:22,713 INFO L82 PathProgramCache]: Analyzing trace with hash 890337870, now seen corresponding path program 21 times [2020-07-20 02:01:22,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:22,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202310685] [2020-07-20 02:01:22,713 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:01:22,724 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:22,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381798940] [2020-07-20 02:01:22,725 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29deb48c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:22,802 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29deb48c issued 4 check-sat command(s) [2020-07-20 02:01:22,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:22,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 91 conjunts are in the unsatisfiable core [2020-07-20 02:01:22,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 42 proven. 672 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-07-20 02:01:24,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202310685] [2020-07-20 02:01:24,399 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:24,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381798940] [2020-07-20 02:01:24,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:24,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-07-20 02:01:24,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654616518] [2020-07-20 02:01:24,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 02:01:24,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:24,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 02:01:24,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-07-20 02:01:24,401 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 26 states. [2020-07-20 02:01:26,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:26,271 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2020-07-20 02:01:26,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 02:01:26,272 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 157 [2020-07-20 02:01:26,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:26,274 INFO L225 Difference]: With dead ends: 172 [2020-07-20 02:01:26,274 INFO L226 Difference]: Without dead ends: 169 [2020-07-20 02:01:26,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2020-07-20 02:01:26,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-07-20 02:01:26,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2020-07-20 02:01:26,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-07-20 02:01:26,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2020-07-20 02:01:26,284 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 157 [2020-07-20 02:01:26,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:26,285 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2020-07-20 02:01:26,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 02:01:26,285 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2020-07-20 02:01:26,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-07-20 02:01:26,286 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:26,286 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:26,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:26,498 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:26,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:26,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1932386095, now seen corresponding path program 22 times [2020-07-20 02:01:26,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:26,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997499566] [2020-07-20 02:01:26,500 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:01:26,505 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:26,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205109451] [2020-07-20 02:01:26,505 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ff448fe No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:26,582 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ff448fe issued 4 check-sat command(s) [2020-07-20 02:01:26,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:26,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 95 conjunts are in the unsatisfiable core [2020-07-20 02:01:26,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:28,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 44 proven. 737 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2020-07-20 02:01:28,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997499566] [2020-07-20 02:01:28,637 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:28,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205109451] [2020-07-20 02:01:28,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:28,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-07-20 02:01:28,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708522601] [2020-07-20 02:01:28,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 02:01:28,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:28,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 02:01:28,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-07-20 02:01:28,639 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 27 states. [2020-07-20 02:01:30,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:30,894 INFO L93 Difference]: Finished difference Result 179 states and 181 transitions. [2020-07-20 02:01:30,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-20 02:01:30,894 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 164 [2020-07-20 02:01:30,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:30,896 INFO L225 Difference]: With dead ends: 179 [2020-07-20 02:01:30,897 INFO L226 Difference]: Without dead ends: 176 [2020-07-20 02:01:30,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2020-07-20 02:01:30,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-07-20 02:01:30,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2020-07-20 02:01:30,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-07-20 02:01:30,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2020-07-20 02:01:30,907 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 164 [2020-07-20 02:01:30,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:30,907 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2020-07-20 02:01:30,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 02:01:30,907 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2020-07-20 02:01:30,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-07-20 02:01:30,908 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:30,909 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:31,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-07-20 02:01:31,112 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:31,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:31,113 INFO L82 PathProgramCache]: Analyzing trace with hash 677687534, now seen corresponding path program 23 times [2020-07-20 02:01:31,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:31,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460154306] [2020-07-20 02:01:31,114 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:01:31,119 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:31,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601265521] [2020-07-20 02:01:31,120 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@23ca7bd7 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:31,201 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@23ca7bd7 issued 4 check-sat command(s) [2020-07-20 02:01:31,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:31,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 99 conjunts are in the unsatisfiable core [2020-07-20 02:01:31,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 46 proven. 805 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-07-20 02:01:33,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460154306] [2020-07-20 02:01:33,882 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:33,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601265521] [2020-07-20 02:01:33,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:33,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-07-20 02:01:33,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935068231] [2020-07-20 02:01:33,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 02:01:33,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:33,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 02:01:33,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-07-20 02:01:33,884 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand 28 states. [2020-07-20 02:01:37,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:37,273 INFO L93 Difference]: Finished difference Result 186 states and 188 transitions. [2020-07-20 02:01:37,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 02:01:37,274 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 171 [2020-07-20 02:01:37,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:37,276 INFO L225 Difference]: With dead ends: 186 [2020-07-20 02:01:37,276 INFO L226 Difference]: Without dead ends: 183 [2020-07-20 02:01:37,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2020-07-20 02:01:37,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-07-20 02:01:37,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2020-07-20 02:01:37,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-07-20 02:01:37,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2020-07-20 02:01:37,290 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 171 [2020-07-20 02:01:37,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:37,290 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2020-07-20 02:01:37,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 02:01:37,290 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2020-07-20 02:01:37,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-07-20 02:01:37,292 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:37,293 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:37,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:37,505 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:37,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:37,506 INFO L82 PathProgramCache]: Analyzing trace with hash 844248625, now seen corresponding path program 24 times [2020-07-20 02:01:37,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:37,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013257255] [2020-07-20 02:01:37,506 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:01:37,510 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:37,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558597632] [2020-07-20 02:01:37,511 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5de2ace5 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:37,694 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5de2ace5 issued 4 check-sat command(s) [2020-07-20 02:01:37,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:37,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 103 conjunts are in the unsatisfiable core [2020-07-20 02:01:37,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 48 proven. 876 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2020-07-20 02:01:41,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013257255] [2020-07-20 02:01:41,198 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:41,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558597632] [2020-07-20 02:01:41,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:41,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-07-20 02:01:41,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960587625] [2020-07-20 02:01:41,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 02:01:41,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:41,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 02:01:41,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-07-20 02:01:41,200 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand 29 states. [2020-07-20 02:01:45,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:45,248 INFO L93 Difference]: Finished difference Result 193 states and 195 transitions. [2020-07-20 02:01:45,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 02:01:45,249 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 178 [2020-07-20 02:01:45,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:45,251 INFO L225 Difference]: With dead ends: 193 [2020-07-20 02:01:45,251 INFO L226 Difference]: Without dead ends: 190 [2020-07-20 02:01:45,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2020-07-20 02:01:45,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-07-20 02:01:45,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2020-07-20 02:01:45,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-07-20 02:01:45,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2020-07-20 02:01:45,261 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 178 [2020-07-20 02:01:45,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:45,262 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2020-07-20 02:01:45,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 02:01:45,262 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2020-07-20 02:01:45,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-07-20 02:01:45,263 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:45,263 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:45,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-07-20 02:01:45,479 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:45,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:45,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1073492082, now seen corresponding path program 25 times [2020-07-20 02:01:45,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:45,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86179549] [2020-07-20 02:01:45,481 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:01:45,485 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:45,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607553561] [2020-07-20 02:01:45,485 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a895b7c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:45,579 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a895b7c issued 4 check-sat command(s) [2020-07-20 02:01:45,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:45,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 107 conjunts are in the unsatisfiable core [2020-07-20 02:01:45,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:01:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 50 proven. 950 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-07-20 02:01:50,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86179549] [2020-07-20 02:01:50,483 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:01:50,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607553561] [2020-07-20 02:01:50,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:01:50,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-07-20 02:01:50,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230411166] [2020-07-20 02:01:50,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-20 02:01:50,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:01:50,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-20 02:01:50,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-07-20 02:01:50,485 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand 30 states. [2020-07-20 02:01:56,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:01:56,881 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2020-07-20 02:01:56,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 02:01:56,882 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 185 [2020-07-20 02:01:56,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:01:56,884 INFO L225 Difference]: With dead ends: 200 [2020-07-20 02:01:56,884 INFO L226 Difference]: Without dead ends: 197 [2020-07-20 02:01:56,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2020-07-20 02:01:56,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-07-20 02:01:56,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2020-07-20 02:01:56,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-07-20 02:01:56,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2020-07-20 02:01:56,902 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 185 [2020-07-20 02:01:56,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:01:56,903 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2020-07-20 02:01:56,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-20 02:01:56,903 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2020-07-20 02:01:56,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-07-20 02:01:56,904 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:01:56,904 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:01:57,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-07-20 02:01:57,109 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:01:57,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:01:57,110 INFO L82 PathProgramCache]: Analyzing trace with hash -372153455, now seen corresponding path program 26 times [2020-07-20 02:01:57,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:01:57,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630837979] [2020-07-20 02:01:57,110 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:01:57,115 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:01:57,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140460413] [2020-07-20 02:01:57,115 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d1b656c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:01:57,204 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d1b656c issued 4 check-sat command(s) [2020-07-20 02:01:57,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:01:57,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 111 conjunts are in the unsatisfiable core [2020-07-20 02:01:57,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:02:05,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 52 proven. 1027 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2020-07-20 02:02:05,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630837979] [2020-07-20 02:02:05,023 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:02:05,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140460413] [2020-07-20 02:02:05,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:02:05,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-07-20 02:02:05,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851276712] [2020-07-20 02:02:05,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-20 02:02:05,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:02:05,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-20 02:02:05,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-07-20 02:02:05,024 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 31 states. [2020-07-20 02:02:13,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:02:13,555 INFO L93 Difference]: Finished difference Result 207 states and 209 transitions. [2020-07-20 02:02:13,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-20 02:02:13,556 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 192 [2020-07-20 02:02:13,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:02:13,558 INFO L225 Difference]: With dead ends: 207 [2020-07-20 02:02:13,558 INFO L226 Difference]: Without dead ends: 204 [2020-07-20 02:02:13,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2020-07-20 02:02:13,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-07-20 02:02:13,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2020-07-20 02:02:13,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-20 02:02:13,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2020-07-20 02:02:13,568 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 192 [2020-07-20 02:02:13,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:02:13,569 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2020-07-20 02:02:13,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-20 02:02:13,569 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2020-07-20 02:02:13,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-20 02:02:13,570 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:02:13,570 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:02:13,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-07-20 02:02:13,784 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:02:13,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:02:13,784 INFO L82 PathProgramCache]: Analyzing trace with hash -185018834, now seen corresponding path program 27 times [2020-07-20 02:02:13,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:02:13,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783316074] [2020-07-20 02:02:13,785 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:02:13,792 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:02:13,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315496826] [2020-07-20 02:02:13,793 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@257397d3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:02:13,899 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@257397d3 issued 4 check-sat command(s) [2020-07-20 02:02:13,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:02:13,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 115 conjunts are in the unsatisfiable core [2020-07-20 02:02:13,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:02:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 54 proven. 1107 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-07-20 02:02:24,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783316074] [2020-07-20 02:02:24,204 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:02:24,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315496826] [2020-07-20 02:02:24,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:02:24,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-07-20 02:02:24,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806634880] [2020-07-20 02:02:24,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-20 02:02:24,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:02:24,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-20 02:02:24,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-07-20 02:02:24,206 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 32 states. [2020-07-20 02:02:35,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:02:35,717 INFO L93 Difference]: Finished difference Result 214 states and 216 transitions. [2020-07-20 02:02:35,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 02:02:35,718 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 199 [2020-07-20 02:02:35,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:02:35,720 INFO L225 Difference]: With dead ends: 214 [2020-07-20 02:02:35,720 INFO L226 Difference]: Without dead ends: 211 [2020-07-20 02:02:35,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 02:02:35,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-07-20 02:02:35,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2020-07-20 02:02:35,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-07-20 02:02:35,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2020-07-20 02:02:35,735 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 199 [2020-07-20 02:02:35,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:02:35,736 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2020-07-20 02:02:35,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-20 02:02:35,736 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2020-07-20 02:02:35,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-07-20 02:02:35,737 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:02:35,737 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:02:35,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-07-20 02:02:35,952 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:02:35,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:02:35,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1527097585, now seen corresponding path program 28 times [2020-07-20 02:02:35,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:02:35,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375209589] [2020-07-20 02:02:35,952 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:02:35,957 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:02:35,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1104379699] [2020-07-20 02:02:35,957 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@551c236a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:02:36,050 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@551c236a issued 4 check-sat command(s) [2020-07-20 02:02:36,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:02:36,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 119 conjunts are in the unsatisfiable core [2020-07-20 02:02:36,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:02:50,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2758 backedges. 56 proven. 1190 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2020-07-20 02:02:50,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375209589] [2020-07-20 02:02:50,448 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:02:50,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104379699] [2020-07-20 02:02:50,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:02:50,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-07-20 02:02:50,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436574421] [2020-07-20 02:02:50,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-20 02:02:50,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:02:50,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-20 02:02:50,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 02:02:50,449 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand 33 states. [2020-07-20 02:03:04,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:03:04,953 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2020-07-20 02:03:04,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-20 02:03:04,953 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 206 [2020-07-20 02:03:04,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:03:04,956 INFO L225 Difference]: With dead ends: 221 [2020-07-20 02:03:04,956 INFO L226 Difference]: Without dead ends: 218 [2020-07-20 02:03:04,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 02:03:04,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-07-20 02:03:04,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2020-07-20 02:03:04,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-07-20 02:03:04,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 219 transitions. [2020-07-20 02:03:04,966 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 219 transitions. Word has length 206 [2020-07-20 02:03:04,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:03:04,966 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 219 transitions. [2020-07-20 02:03:04,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-20 02:03:04,967 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 219 transitions. [2020-07-20 02:03:04,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-07-20 02:03:04,968 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:03:04,968 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:03:05,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:03:05,182 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:03:05,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:03:05,183 INFO L82 PathProgramCache]: Analyzing trace with hash 651019470, now seen corresponding path program 29 times [2020-07-20 02:03:05,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:03:05,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557508061] [2020-07-20 02:03:05,184 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:03:05,188 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:03:05,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [239089813] [2020-07-20 02:03:05,189 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@320fedee No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:03:05,488 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@320fedee issued 4 check-sat command(s) [2020-07-20 02:03:05,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:03:05,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 123 conjunts are in the unsatisfiable core [2020-07-20 02:03:05,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:03:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 58 proven. 1276 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2020-07-20 02:03:23,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557508061] [2020-07-20 02:03:23,251 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:03:23,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239089813] [2020-07-20 02:03:23,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:03:23,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-07-20 02:03:23,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807860636] [2020-07-20 02:03:23,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-20 02:03:23,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:03:23,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-20 02:03:23,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 02:03:23,252 INFO L87 Difference]: Start difference. First operand 218 states and 219 transitions. Second operand 34 states. [2020-07-20 02:03:40,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:03:40,959 INFO L93 Difference]: Finished difference Result 228 states and 230 transitions. [2020-07-20 02:03:40,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-20 02:03:40,960 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 213 [2020-07-20 02:03:40,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:03:40,962 INFO L225 Difference]: With dead ends: 228 [2020-07-20 02:03:40,962 INFO L226 Difference]: Without dead ends: 225 [2020-07-20 02:03:40,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 02:03:40,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-07-20 02:03:40,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2020-07-20 02:03:40,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-07-20 02:03:40,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2020-07-20 02:03:40,975 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 213 [2020-07-20 02:03:40,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:03:40,975 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2020-07-20 02:03:40,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-20 02:03:40,976 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2020-07-20 02:03:40,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-07-20 02:03:40,977 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:03:40,977 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:03:41,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:03:41,192 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:03:41,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:03:41,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1998915153, now seen corresponding path program 30 times [2020-07-20 02:03:41,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:03:41,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318657273] [2020-07-20 02:03:41,193 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:03:41,199 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:03:41,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396456651] [2020-07-20 02:03:41,200 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@260719d6 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:03:41,473 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@260719d6 issued 4 check-sat command(s) [2020-07-20 02:03:41,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:03:41,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 127 conjunts are in the unsatisfiable core [2020-07-20 02:03:41,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:03:49,250 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:03:59,120 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:04:03,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3165 backedges. 60 proven. 1365 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2020-07-20 02:04:03,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318657273] [2020-07-20 02:04:03,846 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:04:03,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396456651] [2020-07-20 02:04:03,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:04:03,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-07-20 02:04:03,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417452604] [2020-07-20 02:04:03,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-20 02:04:03,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:04:03,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-20 02:04:03,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 02:04:03,848 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand 35 states. [2020-07-20 02:04:25,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:04:25,141 INFO L93 Difference]: Finished difference Result 235 states and 237 transitions. [2020-07-20 02:04:25,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-20 02:04:25,145 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 220 [2020-07-20 02:04:25,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:04:25,146 INFO L225 Difference]: With dead ends: 235 [2020-07-20 02:04:25,147 INFO L226 Difference]: Without dead ends: 232 [2020-07-20 02:04:25,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 02:04:25,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-07-20 02:04:25,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2020-07-20 02:04:25,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-20 02:04:25,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2020-07-20 02:04:25,158 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 220 [2020-07-20 02:04:25,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:04:25,159 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2020-07-20 02:04:25,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-20 02:04:25,159 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2020-07-20 02:04:25,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-07-20 02:04:25,160 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:04:25,160 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:04:25,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:04:25,374 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:04:25,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:04:25,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1148413074, now seen corresponding path program 31 times [2020-07-20 02:04:25,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:04:25,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558708636] [2020-07-20 02:04:25,376 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:04:25,381 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:04:25,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113479379] [2020-07-20 02:04:25,381 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b905ccf No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:04:25,486 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b905ccf issued 4 check-sat command(s) [2020-07-20 02:04:25,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:04:25,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 131 conjunts are in the unsatisfiable core [2020-07-20 02:04:25,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:04:25,887 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-07-20 02:04:26,148 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:04:26,448 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 02:04:26,788 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 02:04:27,563 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:04:28,021 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:04:28,520 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:04:29,069 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:04:29,655 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:04:30,297 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 02:04:30,980 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:04:31,700 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:04:32,445 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:04:33,228 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:04:34,078 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:04:34,959 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:04:35,902 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:04:36,874 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:04:37,893 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:04:38,947 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:04:40,039 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:04:41,171 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:04:42,354 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:04:43,573 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:04:44,848 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:04:46,149 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:04:47,490 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:04:48,887 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:04:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3379 backedges. 62 proven. 1457 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-20 02:04:51,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558708636] [2020-07-20 02:04:51,436 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:04:51,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113479379] [2020-07-20 02:04:51,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:04:51,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-07-20 02:04:51,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626458710] [2020-07-20 02:04:51,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 02:04:51,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:04:51,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 02:04:51,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 02:04:51,438 INFO L87 Difference]: Start difference. First operand 232 states and 233 transitions. Second operand 36 states. [2020-07-20 02:05:15,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:05:15,084 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2020-07-20 02:05:15,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 02:05:15,089 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 227 [2020-07-20 02:05:15,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:05:15,091 INFO L225 Difference]: With dead ends: 242 [2020-07-20 02:05:15,091 INFO L226 Difference]: Without dead ends: 239 [2020-07-20 02:05:15,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 02:05:15,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-07-20 02:05:15,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2020-07-20 02:05:15,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-07-20 02:05:15,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 240 transitions. [2020-07-20 02:05:15,103 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 240 transitions. Word has length 227 [2020-07-20 02:05:15,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:05:15,103 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 240 transitions. [2020-07-20 02:05:15,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 02:05:15,103 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 240 transitions. [2020-07-20 02:05:15,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-07-20 02:05:15,105 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:05:15,105 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:05:15,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-07-20 02:05:15,321 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:05:15,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:05:15,321 INFO L82 PathProgramCache]: Analyzing trace with hash -656049231, now seen corresponding path program 32 times [2020-07-20 02:05:15,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:05:15,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229426250] [2020-07-20 02:05:15,322 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:05:15,329 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:05:15,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428162509] [2020-07-20 02:05:15,330 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36a202d7 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:05:15,453 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36a202d7 issued 4 check-sat command(s) [2020-07-20 02:05:15,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:05:15,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 135 conjunts are in the unsatisfiable core [2020-07-20 02:05:15,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:05:15,889 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-07-20 02:05:16,178 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 02:05:16,855 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:05:17,697 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:05:18,208 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:05:18,763 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:05:19,359 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:05:20,001 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:05:20,698 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:05:21,438 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:05:22,220 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:05:23,053 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:05:24,025 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:24,940 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:05:25,899 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:05:26,928 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:05:27,988 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:05:29,107 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:05:30,278 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:05:31,483 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:05:32,729 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:05:34,028 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:05:35,371 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:05:36,909 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:05:38,400 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:05:39,902 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:05:41,451 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:05:43,081 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:05:45,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 64 proven. 1552 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2020-07-20 02:05:45,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229426250] [2020-07-20 02:05:45,940 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:05:45,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428162509] [2020-07-20 02:05:45,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:05:45,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-07-20 02:05:45,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582477469] [2020-07-20 02:05:45,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-20 02:05:45,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:05:45,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-20 02:05:45,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 02:05:45,942 INFO L87 Difference]: Start difference. First operand 239 states and 240 transitions. Second operand 37 states. [2020-07-20 02:06:14,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:06:14,626 INFO L93 Difference]: Finished difference Result 249 states and 251 transitions. [2020-07-20 02:06:14,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-20 02:06:14,627 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 234 [2020-07-20 02:06:14,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:06:14,629 INFO L225 Difference]: With dead ends: 249 [2020-07-20 02:06:14,630 INFO L226 Difference]: Without dead ends: 246 [2020-07-20 02:06:14,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 02:06:14,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-07-20 02:06:14,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2020-07-20 02:06:14,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-07-20 02:06:14,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 247 transitions. [2020-07-20 02:06:14,643 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 247 transitions. Word has length 234 [2020-07-20 02:06:14,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:06:14,644 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 247 transitions. [2020-07-20 02:06:14,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-20 02:06:14,644 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 247 transitions. [2020-07-20 02:06:14,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 02:06:14,645 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:06:14,646 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:06:14,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:06:14,859 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:06:14,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:06:14,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1077978610, now seen corresponding path program 33 times [2020-07-20 02:06:14,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:06:14,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700943352] [2020-07-20 02:06:14,860 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:06:14,866 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:06:14,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [172203097] [2020-07-20 02:06:14,866 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@621113e1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:06:14,994 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@621113e1 issued 4 check-sat command(s) [2020-07-20 02:06:14,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:06:14,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 139 conjunts are in the unsatisfiable core [2020-07-20 02:06:15,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:06:15,248 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:06:15,506 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:06:15,835 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:16,623 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:06:17,115 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:17,651 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:06:18,240 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:06:18,883 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:06:19,574 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:20,320 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:21,106 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:06:21,945 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:22,802 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:23,706 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:06:24,758 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:25,868 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:06:26,971 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:28,126 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:29,335 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:30,548 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:06:31,806 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:33,115 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:06:34,475 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:35,886 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:06:37,352 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:06:38,867 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:40,489 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:42,163 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:43,840 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:06:45,573 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:06:47,355 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:06:50,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 66 proven. 1650 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2020-07-20 02:06:50,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700943352] [2020-07-20 02:06:50,617 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:06:50,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172203097] [2020-07-20 02:06:50,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:06:50,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-07-20 02:06:50,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886431586] [2020-07-20 02:06:50,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-20 02:06:50,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:06:50,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-20 02:06:50,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 02:06:50,619 INFO L87 Difference]: Start difference. First operand 246 states and 247 transitions. Second operand 38 states. [2020-07-20 02:07:24,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:07:24,146 INFO L93 Difference]: Finished difference Result 256 states and 258 transitions. [2020-07-20 02:07:24,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-20 02:07:24,147 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 241 [2020-07-20 02:07:24,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:07:24,148 INFO L225 Difference]: With dead ends: 256 [2020-07-20 02:07:24,148 INFO L226 Difference]: Without dead ends: 253 [2020-07-20 02:07:24,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.3s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 02:07:24,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-07-20 02:07:24,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2020-07-20 02:07:24,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-07-20 02:07:24,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 254 transitions. [2020-07-20 02:07:24,159 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 254 transitions. Word has length 241 [2020-07-20 02:07:24,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:07:24,159 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 254 transitions. [2020-07-20 02:07:24,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-20 02:07:24,160 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 254 transitions. [2020-07-20 02:07:24,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-07-20 02:07:24,161 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:07:24,161 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:07:24,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-07-20 02:07:24,362 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:07:24,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:07:24,362 INFO L82 PathProgramCache]: Analyzing trace with hash 612174097, now seen corresponding path program 34 times [2020-07-20 02:07:24,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:07:24,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264672984] [2020-07-20 02:07:24,363 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:07:24,367 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:07:24,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894283674] [2020-07-20 02:07:24,367 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1990f86b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:07:24,870 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1990f86b issued 4 check-sat command(s) [2020-07-20 02:07:24,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:07:24,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 143 conjunts are in the unsatisfiable core [2020-07-20 02:07:24,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:07:25,307 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-07-20 02:07:25,647 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 02:07:26,032 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:07:26,474 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:07:26,965 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:07:27,508 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:07:28,106 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:07:28,757 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:07:29,461 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:07:30,230 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:31,092 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:07:31,962 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:07:32,879 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:07:33,891 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:34,993 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:07:36,147 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:07:37,360 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:07:38,551 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:07:39,794 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:07:41,175 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:07:42,529 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:07:43,935 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:07:45,548 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:47,171 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:07:48,850 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:07:50,513 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:07:52,207 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:07:53,954 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:07:55,964 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:07:58,343 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:08:00,292 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:08:02,259 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:08:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4063 backedges. 68 proven. 1751 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2020-07-20 02:08:05,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264672984] [2020-07-20 02:08:05,504 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:08:05,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894283674] [2020-07-20 02:08:05,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:08:05,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-07-20 02:08:05,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705972599] [2020-07-20 02:08:05,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-20 02:08:05,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:08:05,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-20 02:08:05,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 02:08:05,505 INFO L87 Difference]: Start difference. First operand 253 states and 254 transitions. Second operand 39 states. [2020-07-20 02:08:41,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:08:41,226 INFO L93 Difference]: Finished difference Result 263 states and 265 transitions. [2020-07-20 02:08:41,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-20 02:08:41,226 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 248 [2020-07-20 02:08:41,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:08:41,228 INFO L225 Difference]: With dead ends: 263 [2020-07-20 02:08:41,229 INFO L226 Difference]: Without dead ends: 260 [2020-07-20 02:08:41,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.3s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 02:08:41,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-07-20 02:08:41,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2020-07-20 02:08:41,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-07-20 02:08:41,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 261 transitions. [2020-07-20 02:08:41,239 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 261 transitions. Word has length 248 [2020-07-20 02:08:41,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:08:41,239 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 261 transitions. [2020-07-20 02:08:41,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-20 02:08:41,239 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 261 transitions. [2020-07-20 02:08:41,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 02:08:41,241 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:08:41,241 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:08:41,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:08:41,446 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:08:41,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:08:41,446 INFO L82 PathProgramCache]: Analyzing trace with hash -2039480146, now seen corresponding path program 35 times [2020-07-20 02:08:41,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:08:41,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321842555] [2020-07-20 02:08:41,447 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:08:41,451 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:08:41,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008291052] [2020-07-20 02:08:41,452 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29015d1e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:08:41,558 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29015d1e issued 4 check-sat command(s) [2020-07-20 02:08:41,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:08:41,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 147 conjunts are in the unsatisfiable core [2020-07-20 02:08:41,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:08:41,773 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 02:08:42,355 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 02:08:42,737 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 02:08:43,177 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 02:08:43,664 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:08:44,226 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:08:44,865 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:08:45,513 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:08:46,210 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 02:08:46,981 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:08:47,777 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:08:48,654 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:08:49,616 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:08:50,570 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:08:51,604 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:08:52,687 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:08:54,057 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:55,236 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:08:56,679 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:08:58,265 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:09:00,160 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:09:01,613 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:09:03,076 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:09:04,626 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:09:06,188 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:09:07,838 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:09:09,565 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:09:11,347 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:09:13,185 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:09:15,068 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:09:16,995 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:09:19,028 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:09:21,075 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:09:24,688 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 02:09:24,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321842555] [2020-07-20 02:09:24,688 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:09:24,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008291052] [2020-07-20 02:09:24,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:09:24,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-07-20 02:09:24,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483456213] [2020-07-20 02:09:24,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-20 02:09:24,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:09:24,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-20 02:09:24,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 02:09:24,690 INFO L87 Difference]: Start difference. First operand 260 states and 261 transitions. Second operand 40 states. [2020-07-20 02:10:05,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:10:05,931 INFO L93 Difference]: Finished difference Result 270 states and 272 transitions. [2020-07-20 02:10:05,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-20 02:10:05,936 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 255 [2020-07-20 02:10:05,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:10:05,937 INFO L225 Difference]: With dead ends: 270 [2020-07-20 02:10:05,937 INFO L226 Difference]: Without dead ends: 267 [2020-07-20 02:10:05,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.9s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 02:10:05,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-07-20 02:10:05,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2020-07-20 02:10:05,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-07-20 02:10:05,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 268 transitions. [2020-07-20 02:10:05,949 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 268 transitions. Word has length 255 [2020-07-20 02:10:05,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:10:05,949 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 268 transitions. [2020-07-20 02:10:05,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-20 02:10:05,949 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 268 transitions. [2020-07-20 02:10:05,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-07-20 02:10:05,951 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:10:05,951 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:10:06,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-07-20 02:10:06,166 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:10:06,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:10:06,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1738649201, now seen corresponding path program 36 times [2020-07-20 02:10:06,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:10:06,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299495556] [2020-07-20 02:10:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:10:06,170 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:10:06,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [181621296] [2020-07-20 02:10:06,170 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@608548be No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:10:06,284 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@608548be issued 4 check-sat command(s) [2020-07-20 02:10:06,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:10:06,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 151 conjunts are in the unsatisfiable core [2020-07-20 02:10:06,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:10:06,524 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 02:10:06,832 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-07-20 02:10:07,202 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:10:07,618 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 02:10:08,102 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:10:08,648 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:10:09,224 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:10:09,864 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:10:10,559 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:10:11,353 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:10:12,214 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:10:13,091 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:10:14,063 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:15,094 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:16,209 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:17,364 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:18,629 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:10:19,833 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:10:21,190 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:10:22,597 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:10:24,052 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:10:25,480 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:10:27,067 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:28,728 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:30,465 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:32,489 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:10:34,404 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:10:36,216 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:10:38,099 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:10:40,039 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:10:42,145 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:10:44,186 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:10:46,303 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:10:48,427 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:10:50,684 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:10:54,742 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 02:10:54,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299495556] [2020-07-20 02:10:54,743 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:10:54,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181621296] [2020-07-20 02:10:54,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:10:54,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-07-20 02:10:54,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550891053] [2020-07-20 02:10:54,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-20 02:10:54,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:10:54,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-20 02:10:54,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 02:10:54,745 INFO L87 Difference]: Start difference. First operand 267 states and 268 transitions. Second operand 41 states. [2020-07-20 02:11:41,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:11:41,032 INFO L93 Difference]: Finished difference Result 277 states and 279 transitions. [2020-07-20 02:11:41,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-07-20 02:11:41,033 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 262 [2020-07-20 02:11:41,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:11:41,035 INFO L225 Difference]: With dead ends: 277 [2020-07-20 02:11:41,035 INFO L226 Difference]: Without dead ends: 274 [2020-07-20 02:11:41,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.3s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 02:11:41,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-07-20 02:11:41,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2020-07-20 02:11:41,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-07-20 02:11:41,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 275 transitions. [2020-07-20 02:11:41,054 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 275 transitions. Word has length 262 [2020-07-20 02:11:41,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:11:41,055 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 275 transitions. [2020-07-20 02:11:41,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-20 02:11:41,055 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 275 transitions. [2020-07-20 02:11:41,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-07-20 02:11:41,057 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:11:41,057 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:11:41,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-07-20 02:11:41,273 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:11:41,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:11:41,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1227394894, now seen corresponding path program 37 times [2020-07-20 02:11:41,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:11:41,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919654431] [2020-07-20 02:11:41,273 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:11:41,277 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:11:41,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928634235] [2020-07-20 02:11:41,277 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2cc3726f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:11:41,392 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2cc3726f issued 4 check-sat command(s) [2020-07-20 02:11:41,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:11:41,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 155 conjunts are in the unsatisfiable core [2020-07-20 02:11:41,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:11:41,641 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 02:11:41,911 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:11:42,306 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:11:42,752 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 02:11:43,257 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 02:11:43,822 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:11:44,444 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:11:45,128 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:11:45,871 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:11:46,719 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:11:47,638 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:11:48,625 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:11:49,656 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:11:50,687 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:11:51,958 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:11:53,320 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:11:54,586 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:11:55,885 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:11:57,311 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:11:58,756 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:12:00,301 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:12:01,907 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:12:03,537 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:12:05,219 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:12:07,025 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:12:08,964 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:12:10,956 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:12:12,898 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:12:14,856 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:12:17,180 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:12:19,402 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:12:21,665 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:12:24,026 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:12:26,512 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:12:29,016 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:12:31,670 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:12:36,215 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 02:12:36,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919654431] [2020-07-20 02:12:36,216 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:12:36,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928634235] [2020-07-20 02:12:36,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:12:36,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-07-20 02:12:36,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287436859] [2020-07-20 02:12:36,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-20 02:12:36,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:12:36,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-20 02:12:36,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 02:12:36,218 INFO L87 Difference]: Start difference. First operand 274 states and 275 transitions. Second operand 42 states. [2020-07-20 02:13:31,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:13:31,617 INFO L93 Difference]: Finished difference Result 284 states and 286 transitions. [2020-07-20 02:13:31,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-20 02:13:31,618 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 269 [2020-07-20 02:13:31,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:13:31,620 INFO L225 Difference]: With dead ends: 284 [2020-07-20 02:13:31,620 INFO L226 Difference]: Without dead ends: 281 [2020-07-20 02:13:31,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.8s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2020-07-20 02:13:31,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-07-20 02:13:31,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2020-07-20 02:13:31,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-07-20 02:13:31,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 282 transitions. [2020-07-20 02:13:31,632 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 282 transitions. Word has length 269 [2020-07-20 02:13:31,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:13:31,632 INFO L479 AbstractCegarLoop]: Abstraction has 281 states and 282 transitions. [2020-07-20 02:13:31,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-07-20 02:13:31,633 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 282 transitions. [2020-07-20 02:13:31,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-07-20 02:13:31,634 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:13:31,634 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:13:31,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-07-20 02:13:31,846 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:13:31,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:13:31,847 INFO L82 PathProgramCache]: Analyzing trace with hash 2039049169, now seen corresponding path program 38 times [2020-07-20 02:13:31,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:13:31,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750630560] [2020-07-20 02:13:31,847 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e55bbae [2020-07-20 02:13:31,852 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 02:13:31,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562030975] [2020-07-20 02:13:31,852 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5d08f282 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 02:13:31,970 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5d08f282 issued 4 check-sat command(s) [2020-07-20 02:13:31,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 02:13:31,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 159 conjunts are in the unsatisfiable core [2020-07-20 02:13:31,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 02:13:32,324 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:32,667 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:33,134 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:33,648 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:34,247 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:34,907 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:35,632 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:36,420 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:37,318 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:38,248 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:39,260 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:40,349 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:13:41,496 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:13:42,729 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:13:44,125 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:45,630 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:13:47,522 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:13:49,559 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 02:13:51,200 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:13:52,884 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:13:54,684 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:56,472 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:13:58,365 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:14:00,297 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:14:02,378 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:14:04,553 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:14:06,788 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:14:09,117 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:14:11,524 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:14:14,343 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:14:16,911 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:14:19,527 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:14:22,421 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 02:14:25,210 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:14:28,126 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:14:31,139 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 02:14:33,994 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 02:14:39,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5073 backedges. 76 proven. 2185 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2020-07-20 02:14:39,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750630560] [2020-07-20 02:14:39,315 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 02:14:39,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562030975] [2020-07-20 02:14:39,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 02:14:39,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-07-20 02:14:39,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850662734] [2020-07-20 02:14:39,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-07-20 02:14:39,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:14:39,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-07-20 02:14:39,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-07-20 02:14:39,317 INFO L87 Difference]: Start difference. First operand 281 states and 282 transitions. Second operand 43 states.