/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/ps3-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:51:26,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:51:26,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:51:26,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:51:26,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:51:26,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:51:26,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:51:26,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:51:26,138 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:51:26,139 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:51:26,140 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:51:26,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:51:26,146 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:51:26,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:51:26,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:51:26,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:51:26,154 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:51:26,160 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:51:26,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:51:26,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:51:26,164 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 [2021-05-02 13:51:26,191 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:51:26,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:51:26,193 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:51:26,193 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:51:26,194 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:51:26,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:51:26,194 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:51:26,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:51:26,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:51:26,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:51:26,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:51:26,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:51:26,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:51:26,195 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:51:26,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:51:26,195 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:51:26,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:51:26,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:51:26,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:51:26,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:51:26,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:51:26,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:51:26,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:51:26,197 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:51:26,197 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:51:26,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:51:26,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:51:26,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:51:26,197 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:51:26,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:51:26,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:51:26,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:51:26,490 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:51:26,491 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:51:26,491 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps3-ll.c [2021-05-02 13:51:26,550 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96458229d/e8e11a36eb8a4f678f02edb889bbc3d2/FLAGbb280f472 [2021-05-02 13:51:26,852 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:51:26,853 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps3-ll.c [2021-05-02 13:51:26,856 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96458229d/e8e11a36eb8a4f678f02edb889bbc3d2/FLAGbb280f472 [2021-05-02 13:51:27,284 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96458229d/e8e11a36eb8a4f678f02edb889bbc3d2 [2021-05-02 13:51:27,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:51:27,290 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:51:27,292 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:51:27,292 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:51:27,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:51:27,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:51:27" (1/1) ... [2021-05-02 13:51:27,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20d1451e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:27, skipping insertion in model container [2021-05-02 13:51:27,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:51:27" (1/1) ... [2021-05-02 13:51:27,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:51:27,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:51:27,399 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps3-ll.c[458,471] [2021-05-02 13:51:27,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:51:27,411 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:51:27,419 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps3-ll.c[458,471] [2021-05-02 13:51:27,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:51:27,439 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:51:27,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:27 WrapperNode [2021-05-02 13:51:27,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:51:27,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:51:27,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:51:27,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:51:27,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:27" (1/1) ... [2021-05-02 13:51:27,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:27" (1/1) ... [2021-05-02 13:51:27,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:27" (1/1) ... [2021-05-02 13:51:27,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:27" (1/1) ... [2021-05-02 13:51:27,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:27" (1/1) ... [2021-05-02 13:51:27,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:27" (1/1) ... [2021-05-02 13:51:27,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:27" (1/1) ... [2021-05-02 13:51:27,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:51:27,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:51:27,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:51:27,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:51:27,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:27" (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 [2021-05-02 13:51:27,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:51:27,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:51:27,571 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:51:27,571 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:51:27,571 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:51:27,572 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:51:27,572 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:51:27,572 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:51:27,572 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:51:27,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:51:27,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 13:51:27,572 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:51:27,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:51:27,573 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:51:27,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:51:27,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:51:27,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:51:27,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:51:27,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:51:27,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:51:27,747 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:51:27,748 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:51:27,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:51:27 BoogieIcfgContainer [2021-05-02 13:51:27,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:51:27,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:51:27,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:51:27,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:51:27,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:51:27" (1/3) ... [2021-05-02 13:51:27,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@458194c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:51:27, skipping insertion in model container [2021-05-02 13:51:27,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:27" (2/3) ... [2021-05-02 13:51:27,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@458194c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:51:27, skipping insertion in model container [2021-05-02 13:51:27,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:51:27" (3/3) ... [2021-05-02 13:51:27,754 INFO L111 eAbstractionObserver]: Analyzing ICFG ps3-ll.c [2021-05-02 13:51:27,758 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:51:27,760 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:51:27,770 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:51:27,784 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:51:27,784 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:51:27,784 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:51:27,784 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:51:27,785 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:51:27,785 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:51:27,785 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:51:27,785 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:51:27,798 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:51:27,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 13:51:27,801 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:27,802 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:27,802 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:27,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:27,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1469283919, now seen corresponding path program 1 times [2021-05-02 13:51:27,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:27,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628209209] [2021-05-02 13:51:27,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:27,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:51:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:28,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:51:28,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:28,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628209209] [2021-05-02 13:51:28,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628209209] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:51:28,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:51:28,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:51:28,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439079447] [2021-05-02 13:51:28,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:51:28,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:28,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:51:28,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:51:28,020 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:51:28,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:28,083 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-05-02 13:51:28,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:51:28,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 13:51:28,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:28,089 INFO L225 Difference]: With dead ends: 36 [2021-05-02 13:51:28,089 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 13:51:28,091 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:51:28,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 13:51:28,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-02 13:51:28,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:51:28,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-05-02 13:51:28,121 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2021-05-02 13:51:28,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:28,122 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-05-02 13:51:28,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:51:28,122 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-05-02 13:51:28,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 13:51:28,123 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:28,123 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:28,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:51:28,123 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:28,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:28,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1467496459, now seen corresponding path program 1 times [2021-05-02 13:51:28,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:28,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819961277] [2021-05-02 13:51:28,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:28,153 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:28,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162276861] [2021-05-02 13:51:28,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 13:51:28,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:28,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 13:51:28,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:51:28,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:28,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819961277] [2021-05-02 13:51:28,320 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:51:28,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162276861] [2021-05-02 13:51:28,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162276861] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:51:28,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:51:28,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 13:51:28,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091955440] [2021-05-02 13:51:28,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 13:51:28,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:28,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 13:51:28,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:51:28,328 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:51:28,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:28,370 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-05-02 13:51:28,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 13:51:28,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 13:51:28,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:28,371 INFO L225 Difference]: With dead ends: 26 [2021-05-02 13:51:28,372 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 13:51:28,372 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:51:28,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 13:51:28,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 13:51:28,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:51:28,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-05-02 13:51:28,393 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 11 [2021-05-02 13:51:28,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:28,393 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-05-02 13:51:28,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:51:28,394 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-05-02 13:51:28,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 13:51:28,394 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:28,394 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:28,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 13:51:28,608 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:28,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:28,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1366100723, now seen corresponding path program 1 times [2021-05-02 13:51:28,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:28,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624080973] [2021-05-02 13:51:28,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:28,616 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:28,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657914873] [2021-05-02 13:51:28,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 13:51:28,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:28,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 13:51:28,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:28,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:51:28,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:28,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624080973] [2021-05-02 13:51:28,784 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:51:28,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657914873] [2021-05-02 13:51:28,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657914873] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:51:28,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:51:28,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 13:51:28,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369449111] [2021-05-02 13:51:28,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:51:28,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:28,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:51:28,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:51:28,786 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:51:28,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:28,862 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-05-02 13:51:28,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:51:28,862 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 13:51:28,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:28,863 INFO L225 Difference]: With dead ends: 33 [2021-05-02 13:51:28,863 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 13:51:28,863 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:51:28,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 13:51:28,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-02 13:51:28,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:51:28,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-05-02 13:51:28,868 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 18 [2021-05-02 13:51:28,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:28,868 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-05-02 13:51:28,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:51:28,869 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-05-02 13:51:28,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 13:51:28,869 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:28,869 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:29,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:51:29,083 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:29,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:29,083 INFO L82 PathProgramCache]: Analyzing trace with hash 673668341, now seen corresponding path program 2 times [2021-05-02 13:51:29,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:29,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405272112] [2021-05-02 13:51:29,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:29,090 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:29,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509100046] [2021-05-02 13:51:29,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-05-02 13:51:29,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:51:29,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:51:29,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 13:51:29,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:51:29,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:29,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405272112] [2021-05-02 13:51:29,267 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:51:29,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509100046] [2021-05-02 13:51:29,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509100046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:51:29,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:51:29,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:51:29,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757177945] [2021-05-02 13:51:29,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:51:29,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:29,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:51:29,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:51:29,270 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:51:29,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:29,350 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-05-02 13:51:29,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:51:29,351 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2021-05-02 13:51:29,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:29,353 INFO L225 Difference]: With dead ends: 40 [2021-05-02 13:51:29,353 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 13:51:29,354 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:51:29,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 13:51:29,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 13:51:29,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:51:29,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-05-02 13:51:29,367 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 25 [2021-05-02 13:51:29,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:29,367 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-05-02 13:51:29,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:51:29,367 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-05-02 13:51:29,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 13:51:29,368 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:29,368 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:29,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:51:29,590 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:29,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:29,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1026670605, now seen corresponding path program 3 times [2021-05-02 13:51:29,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:29,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87184767] [2021-05-02 13:51:29,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:29,603 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:29,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22533534] [2021-05-02 13:51:29,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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