/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-scaling/ps4-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 16:49:46,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 16:49:46,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 16:49:46,272 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 16:49:46,291 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 16:49:46,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 16:49:46,294 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 16:49:46,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 16:49:46,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 16:49:46,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 16:49:46,300 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 16:49:46,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 16:49:46,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 16:49:46,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 16:49:46,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 16:49:46,311 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 16:49:46,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 16:49:46,324 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 16:49:46,325 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 16:49:46,325 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 16:49:46,329 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 16:49:46,385 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 16:49:46,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 16:49:46,388 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 16:49:46,388 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 16:49:46,389 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 16:49:46,389 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 16:49:46,389 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 16:49:46,389 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 16:49:46,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 16:49:46,390 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 16:49:46,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 16:49:46,391 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 16:49:46,391 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 16:49:46,391 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 16:49:46,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 16:49:46,391 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 16:49:46,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 16:49:46,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 16:49:46,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 16:49:46,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 16:49:46,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 16:49:46,392 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 16:49:46,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 16:49:46,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 16:49:46,393 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 16:49:46,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 16:49:46,393 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 16:49:46,393 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 16:49:46,393 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 16:49:46,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 16:49:46,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 16:49:46,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 16:49:46,785 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 16:49:46,786 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 16:49:46,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound10.c [2021-05-02 16:49:46,842 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea522b4f0/dd26816ff98b4aa9861289cb9eb32f9d/FLAGf79817dbd [2021-05-02 16:49:47,233 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 16:49:47,233 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound10.c [2021-05-02 16:49:47,238 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea522b4f0/dd26816ff98b4aa9861289cb9eb32f9d/FLAGf79817dbd [2021-05-02 16:49:47,640 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea522b4f0/dd26816ff98b4aa9861289cb9eb32f9d [2021-05-02 16:49:47,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 16:49:47,644 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 16:49:47,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 16:49:47,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 16:49:47,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 16:49:47,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:49:47" (1/1) ... [2021-05-02 16:49:47,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fe30e64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:49:47, skipping insertion in model container [2021-05-02 16:49:47,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:49:47" (1/1) ... [2021-05-02 16:49:47,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 16:49:47,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 16:49:47,756 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-scaling/ps4-ll_unwindbound10.c[458,471] [2021-05-02 16:49:47,767 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:49:47,773 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 16:49:47,784 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-scaling/ps4-ll_unwindbound10.c[458,471] [2021-05-02 16:49:47,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:49:47,807 INFO L208 MainTranslator]: Completed translation [2021-05-02 16:49:47,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:49:47 WrapperNode [2021-05-02 16:49:47,808 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 16:49:47,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 16:49:47,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 16:49:47,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 16:49:47,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:49:47" (1/1) ... [2021-05-02 16:49:47,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:49:47" (1/1) ... [2021-05-02 16:49:47,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:49:47" (1/1) ... [2021-05-02 16:49:47,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:49:47" (1/1) ... [2021-05-02 16:49:47,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:49:47" (1/1) ... [2021-05-02 16:49:47,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:49:47" (1/1) ... [2021-05-02 16:49:47,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:49:47" (1/1) ... [2021-05-02 16:49:47,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 16:49:47,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 16:49:47,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 16:49:47,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 16:49:47,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:49:47" (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 16:49:47,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 16:49:47,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 16:49:47,918 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 16:49:47,918 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 16:49:47,918 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 16:49:47,919 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 16:49:47,919 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 16:49:47,919 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 16:49:47,919 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 16:49:47,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 16:49:47,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 16:49:47,919 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 16:49:47,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 16:49:47,919 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 16:49:47,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 16:49:47,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 16:49:47,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 16:49:47,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 16:49:47,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 16:49:47,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 16:49:48,094 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 16:49:48,095 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 16:49:48,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:49:48 BoogieIcfgContainer [2021-05-02 16:49:48,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 16:49:48,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 16:49:48,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 16:49:48,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 16:49:48,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 04:49:47" (1/3) ... [2021-05-02 16:49:48,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ae2a5a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:49:48, skipping insertion in model container [2021-05-02 16:49:48,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:49:47" (2/3) ... [2021-05-02 16:49:48,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ae2a5a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:49:48, skipping insertion in model container [2021-05-02 16:49:48,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:49:48" (3/3) ... [2021-05-02 16:49:48,102 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound10.c [2021-05-02 16:49:48,106 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 16:49:48,109 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 16:49:48,122 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 16:49:48,140 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 16:49:48,141 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 16:49:48,141 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 16:49:48,141 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 16:49:48,141 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 16:49:48,141 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 16:49:48,141 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 16:49:48,141 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 16:49:48,157 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:49:48,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 16:49:48,160 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:49:48,160 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:49:48,161 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:49:48,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:49:48,164 INFO L82 PathProgramCache]: Analyzing trace with hash -2133548928, now seen corresponding path program 1 times [2021-05-02 16:49:48,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:49:48,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851787895] [2021-05-02 16:49:48,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:49:48,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:49:48,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 16:49:48,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:49:48,460 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 16:49:48,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:49:48,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851787895] [2021-05-02 16:49:48,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851787895] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:49:48,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:49:48,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 16:49:48,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202694069] [2021-05-02 16:49:48,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 16:49:48,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:49:48,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 16:49:48,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:49:48,481 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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 16:49:48,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:49:48,568 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2021-05-02 16:49:48,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 16:49:48,586 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 16:49:48,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:49:48,592 INFO L225 Difference]: With dead ends: 41 [2021-05-02 16:49:48,592 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 16:49:48,596 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:49:48,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 16:49:48,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-05-02 16:49:48,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 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 16:49:48,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-05-02 16:49:48,622 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-05-02 16:49:48,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:49:48,622 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-05-02 16:49:48,622 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 16:49:48,623 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-05-02 16:49:48,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 16:49:48,623 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:49:48,623 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:49:48,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 16:49:48,624 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:49:48,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:49:48,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2118701623, now seen corresponding path program 1 times [2021-05-02 16:49:48,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:49:48,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44300297] [2021-05-02 16:49:48,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:49:48,639 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:49:48,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2093905030] [2021-05-02 16:49:48,640 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 16:49:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:49:48,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 16:49:48,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:49:48,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:49:48,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:49:48,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:49:48,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:49:48,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:49:48,784 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 16:49:48,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:49:48,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44300297] [2021-05-02 16:49:48,785 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:49:48,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093905030] [2021-05-02 16:49:48,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093905030] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:49:48,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:49:48,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 16:49:48,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718353988] [2021-05-02 16:49:48,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 16:49:48,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:49:48,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 16:49:48,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:49:48,788 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 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 16:49:48,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:49:48,799 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-05-02 16:49:48,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 16:49:48,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 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 12 [2021-05-02 16:49:48,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:49:48,801 INFO L225 Difference]: With dead ends: 28 [2021-05-02 16:49:48,801 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 16:49:48,801 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:49:48,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 16:49:48,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-02 16:49:48,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 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 16:49:48,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-02 16:49:48,807 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-05-02 16:49:48,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:49:48,807 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-02 16:49:48,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 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 16:49:48,808 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-02 16:49:48,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 16:49:48,808 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:49:48,808 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:49:49,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 16:49:49,030 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:49:49,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:49:49,031 INFO L82 PathProgramCache]: Analyzing trace with hash -2116914163, now seen corresponding path program 1 times [2021-05-02 16:49:49,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:49:49,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127559627] [2021-05-02 16:49:49,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:49:49,066 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:49:49,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1666293103] [2021-05-02 16:49:49,066 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 16:49:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:49:49,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 16:49:49,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:49:49,154 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 16:49:49,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:49:49,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127559627] [2021-05-02 16:49:49,155 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:49:49,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666293103] [2021-05-02 16:49:49,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666293103] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:49:49,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:49:49,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 16:49:49,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461870734] [2021-05-02 16:49:49,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 16:49:49,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:49:49,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 16:49:49,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 16:49:49,158 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 16:49:49,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:49:49,220 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-05-02 16:49:49,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 16:49:49,221 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 12 [2021-05-02 16:49:49,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:49:49,221 INFO L225 Difference]: With dead ends: 30 [2021-05-02 16:49:49,221 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 16:49:49,222 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:49:49,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 16:49:49,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 16:49:49,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:49:49,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-02 16:49:49,230 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 12 [2021-05-02 16:49:49,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:49:49,230 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-02 16:49:49,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 16:49:49,230 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-02 16:49:49,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 16:49:49,231 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:49:49,231 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:49:49,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:49:49,441 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:49:49,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:49:49,442 INFO L82 PathProgramCache]: Analyzing trace with hash -263585780, now seen corresponding path program 1 times [2021-05-02 16:49:49,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:49:49,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287667483] [2021-05-02 16:49:49,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:49:49,452 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:49:49,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1604477052] [2021-05-02 16:49:49,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 16:49:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:49:49,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 16:49:49,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:49:49,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:49:49,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:49:49,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:49:49,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:49:49,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:49:49,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:49:49,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:49:49,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:49:49,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:49:49,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:49:49,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287667483] [2021-05-02 16:49:49,640 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:49:49,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604477052] [2021-05-02 16:49:49,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604477052] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:49:49,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:49:49,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 16:49:49,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441222681] [2021-05-02 16:49:49,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 16:49:49,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:49:49,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 16:49:49,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 16:49:49,641 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 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 16:49:49,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:49:49,666 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-05-02 16:49:49,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 16:49:49,666 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 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 20 [2021-05-02 16:49:49,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:49:49,667 INFO L225 Difference]: With dead ends: 36 [2021-05-02 16:49:49,667 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 16:49:49,667 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:49:49,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 16:49:49,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 16:49:49,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:49:49,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-02 16:49:49,672 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2021-05-02 16:49:49,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:49:49,673 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-02 16:49:49,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 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 16:49:49,673 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-02 16:49:49,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 16:49:49,673 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:49:49,673 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:49:49,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:49:49,888 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:49:49,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:49:49,888 INFO L82 PathProgramCache]: Analyzing trace with hash -261798320, now seen corresponding path program 1 times [2021-05-02 16:49:49,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:49:49,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124466062] [2021-05-02 16:49:49,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:49:49,897 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:49:49,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573032168] [2021-05-02 16:49:49,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 16:49:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:49:49,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:49:49,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:49:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:49:50,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:49:50,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124466062] [2021-05-02 16:49:50,036 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:49:50,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573032168] [2021-05-02 16:49:50,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573032168] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:49:50,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:49:50,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 16:49:50,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36686394] [2021-05-02 16:49:50,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:49:50,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:49:50,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:49:50,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:49:50,038 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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 16:53:03,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:03,682 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-05-02 16:53:03,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:53:03,683 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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 20 [2021-05-02 16:53:03,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:03,684 INFO L225 Difference]: With dead ends: 38 [2021-05-02 16:53:03,684 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 16:53:03,685 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:53:03,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 16:53:03,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 16:53:03,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:53:03,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-02 16:53:03,691 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 20 [2021-05-02 16:53:03,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:03,692 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-02 16:53:03,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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 16:53:03,692 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-02 16:53:03,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 16:53:03,693 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:03,693 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:03,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:03,913 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:03,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:03,913 INFO L82 PathProgramCache]: Analyzing trace with hash 891414954, now seen corresponding path program 1 times [2021-05-02 16:53:03,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:03,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594218855] [2021-05-02 16:53:03,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:03,921 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:03,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772762586] [2021-05-02 16:53:03,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 16:53:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:53:03,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 16:53:03,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:04,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 16:53:04,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:04,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594218855] [2021-05-02 16:53:04,178 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:04,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772762586] [2021-05-02 16:53:04,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772762586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:04,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:04,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 16:53:04,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192746300] [2021-05-02 16:53:04,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 16:53:04,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:04,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 16:53:04,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:53:04,180 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 16:53:04,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:04,285 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-05-02 16:53:04,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 16:53:04,285 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 26 [2021-05-02 16:53:04,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:04,286 INFO L225 Difference]: With dead ends: 41 [2021-05-02 16:53:04,286 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 16:53:04,289 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:53:04,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 16:53:04,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 16:53:04,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:53:04,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-02 16:53:04,303 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-02 16:53:04,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:04,303 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-02 16:53:04,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 16:53:04,304 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-02 16:53:04,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 16:53:04,305 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:04,305 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:04,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 16:53:04,530 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:04,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:04,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1647059121, now seen corresponding path program 2 times [2021-05-02 16:53:04,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:04,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450429830] [2021-05-02 16:53:04,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:04,546 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:04,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626561134] [2021-05-02 16:53:04,546 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 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 [2021-05-02 16:53:04,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:53:04,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:04,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 16:53:04,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:04,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:53:04,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:04,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450429830] [2021-05-02 16:53:04,713 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:04,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626561134] [2021-05-02 16:53:04,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626561134] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:04,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:04,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 16:53:04,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522792012] [2021-05-02 16:53:04,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 16:53:04,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:04,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 16:53:04,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:53:04,715 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 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 16:53:04,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:04,775 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-05-02 16:53:04,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:53:04,775 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 16:53:04,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:04,779 INFO L225 Difference]: With dead ends: 44 [2021-05-02 16:53:04,779 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 16:53:04,780 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:53:04,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 16:53:04,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 16:53:04,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:53:04,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-05-02 16:53:04,798 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 28 [2021-05-02 16:53:04,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:04,799 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-05-02 16:53:04,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 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 16:53:04,799 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-05-02 16:53:04,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 16:53:04,800 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:04,800 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:05,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:05,017 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:05,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:05,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1645271661, now seen corresponding path program 2 times [2021-05-02 16:53:05,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:05,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708282058] [2021-05-02 16:53:05,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:05,026 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:05,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332142706] [2021-05-02 16:53:05,026 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 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 [2021-05-02 16:53:05,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:53:05,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:05,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 16:53:05,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:05,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:53:05,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:05,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708282058] [2021-05-02 16:53:05,273 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:05,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332142706] [2021-05-02 16:53:05,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332142706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:05,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:05,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 16:53:05,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986451680] [2021-05-02 16:53:05,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 16:53:05,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:05,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 16:53:05,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:53:05,275 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 8 states have internal predecessors, (17), 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 16:53:05,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:05,391 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-05-02 16:53:05,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 16:53:05,392 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 8 states have internal predecessors, (17), 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 28 [2021-05-02 16:53:05,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:05,393 INFO L225 Difference]: With dead ends: 46 [2021-05-02 16:53:05,393 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 16:53:05,393 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 16:53:05,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 16:53:05,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 16:53:05,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:53:05,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-02 16:53:05,399 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 28 [2021-05-02 16:53:05,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:05,399 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-02 16:53:05,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 8 states have internal predecessors, (17), 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 16:53:05,399 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-02 16:53:05,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 16:53:05,400 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:05,400 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:05,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:05,621 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:05,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:05,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1036651181, now seen corresponding path program 2 times [2021-05-02 16:53:05,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:05,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534617867] [2021-05-02 16:53:05,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:05,631 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:05,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390371096] [2021-05-02 16:53:05,631 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 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 [2021-05-02 16:53:05,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:53:05,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:05,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 16:53:05,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:05,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 16:53:05,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:05,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534617867] [2021-05-02 16:53:05,906 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:05,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390371096] [2021-05-02 16:53:05,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390371096] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:05,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:05,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 16:53:05,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358011601] [2021-05-02 16:53:05,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 16:53:05,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:05,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 16:53:05,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:53:05,908 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:53:06,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:06,026 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-05-02 16:53:06,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 16:53:06,026 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2021-05-02 16:53:06,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:06,028 INFO L225 Difference]: With dead ends: 49 [2021-05-02 16:53:06,028 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 16:53:06,028 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 16:53:06,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 16:53:06,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-02 16:53:06,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:53:06,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-05-02 16:53:06,043 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 34 [2021-05-02 16:53:06,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:06,044 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-05-02 16:53:06,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:53:06,044 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-05-02 16:53:06,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 16:53:06,048 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:06,048 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:06,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 16:53:06,271 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:06,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:06,272 INFO L82 PathProgramCache]: Analyzing trace with hash 486001554, now seen corresponding path program 3 times [2021-05-02 16:53:06,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:06,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349978949] [2021-05-02 16:53:06,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:06,282 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:06,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742173183] [2021-05-02 16:53:06,282 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 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 [2021-05-02 16:53:06,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 16:53:06,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:06,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 16:53:06,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:06,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,445 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:53:06,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:06,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349978949] [2021-05-02 16:53:06,445 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:06,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742173183] [2021-05-02 16:53:06,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742173183] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:06,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:06,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 16:53:06,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462899874] [2021-05-02 16:53:06,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 16:53:06,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:06,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 16:53:06,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 16:53:06,447 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 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 16:53:06,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:06,545 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-05-02 16:53:06,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 16:53:06,545 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-05-02 16:53:06,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:06,546 INFO L225 Difference]: With dead ends: 52 [2021-05-02 16:53:06,546 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 16:53:06,547 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:53:06,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 16:53:06,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 16:53:06,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:53:06,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-05-02 16:53:06,551 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 36 [2021-05-02 16:53:06,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:06,552 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-05-02 16:53:06,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 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 16:53:06,552 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-05-02 16:53:06,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 16:53:06,552 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:06,552 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:06,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:06,774 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:06,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:06,775 INFO L82 PathProgramCache]: Analyzing trace with hash 487789014, now seen corresponding path program 3 times [2021-05-02 16:53:06,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:06,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406110694] [2021-05-02 16:53:06,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:06,785 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:06,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1000156716] [2021-05-02 16:53:06,786 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 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 [2021-05-02 16:53:06,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 16:53:06,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:06,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 16:53:06,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:06,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 16:53:06,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:06,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406110694] [2021-05-02 16:53:06,934 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:06,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000156716] [2021-05-02 16:53:06,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000156716] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:06,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:06,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 16:53:06,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012047224] [2021-05-02 16:53:06,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 16:53:06,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:06,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 16:53:06,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 16:53:06,936 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 16:53:06,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:06,990 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-05-02 16:53:06,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 16:53:06,990 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-05-02 16:53:06,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:06,991 INFO L225 Difference]: With dead ends: 50 [2021-05-02 16:53:06,991 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 16:53:06,991 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:53:06,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 16:53:06,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-02 16:53:06,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 7 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 16:53:06,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-05-02 16:53:06,996 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 36 [2021-05-02 16:53:06,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:06,996 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-05-02 16:53:06,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 16:53:06,996 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-05-02 16:53:06,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 16:53:06,997 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:06,997 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:07,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:07,219 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:07,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:07,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1383171920, now seen corresponding path program 3 times [2021-05-02 16:53:07,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:07,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002246953] [2021-05-02 16:53:07,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:07,228 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:07,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269488079] [2021-05-02 16:53:07,229 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 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 [2021-05-02 16:53:07,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 16:53:07,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:07,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 16:53:07,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:07,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 16:53:07,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:07,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002246953] [2021-05-02 16:53:07,676 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:07,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269488079] [2021-05-02 16:53:07,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269488079] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:07,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:07,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 16:53:07,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249517100] [2021-05-02 16:53:07,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 16:53:07,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:07,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 16:53:07,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:53:07,678 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:53:07,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:07,746 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-05-02 16:53:07,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 16:53:07,747 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 42 [2021-05-02 16:53:07,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:07,747 INFO L225 Difference]: With dead ends: 52 [2021-05-02 16:53:07,747 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 16:53:07,748 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:53:07,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 16:53:07,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 16:53:07,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:53:07,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-05-02 16:53:07,753 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 42 [2021-05-02 16:53:07,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:07,753 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-05-02 16:53:07,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:53:07,753 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-05-02 16:53:07,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 16:53:07,754 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:07,754 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:07,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 16:53:07,958 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:07,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:07,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1386691371, now seen corresponding path program 4 times [2021-05-02 16:53:07,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:07,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797754432] [2021-05-02 16:53:07,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:07,974 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:07,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266851133] [2021-05-02 16:53:07,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-05-02 16:53:08,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:53:08,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:08,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 16:53:08,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:08,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:53:08,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:08,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797754432] [2021-05-02 16:53:08,173 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:08,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266851133] [2021-05-02 16:53:08,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266851133] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:08,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:08,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 16:53:08,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352226203] [2021-05-02 16:53:08,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:53:08,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:08,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:53:08,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:53:08,174 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 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 16:53:08,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:08,255 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-05-02 16:53:08,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 16:53:08,256 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 44 [2021-05-02 16:53:08,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:08,256 INFO L225 Difference]: With dead ends: 58 [2021-05-02 16:53:08,256 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 16:53:08,257 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:53:08,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 16:53:08,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-02 16:53:08,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:53:08,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-05-02 16:53:08,266 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 44 [2021-05-02 16:53:08,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:08,266 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-05-02 16:53:08,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 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 16:53:08,266 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-05-02 16:53:08,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 16:53:08,269 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:08,269 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:08,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 16:53:08,477 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:08,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:08,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1037185971, now seen corresponding path program 4 times [2021-05-02 16:53:08,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:08,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301526249] [2021-05-02 16:53:08,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:08,482 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:08,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220209915] [2021-05-02 16:53:08,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-05-02 16:53:08,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:53:08,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:08,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 16:53:08,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:08,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 16:53:08,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:08,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301526249] [2021-05-02 16:53:08,868 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:08,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220209915] [2021-05-02 16:53:08,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220209915] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:08,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:08,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 16:53:08,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805701059] [2021-05-02 16:53:08,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 16:53:08,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:08,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 16:53:08,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:53:08,869 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:53:09,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:09,014 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-05-02 16:53:09,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 16:53:09,015 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2021-05-02 16:53:09,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:09,016 INFO L225 Difference]: With dead ends: 60 [2021-05-02 16:53:09,016 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 16:53:09,016 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 16:53:09,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 16:53:09,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 16:53:09,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:53:09,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-05-02 16:53:09,044 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2021-05-02 16:53:09,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:09,044 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-05-02 16:53:09,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:53:09,044 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-05-02 16:53:09,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 16:53:09,044 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:09,045 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:09,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 16:53:09,249 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:09,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:09,250 INFO L82 PathProgramCache]: Analyzing trace with hash 999934744, now seen corresponding path program 5 times [2021-05-02 16:53:09,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:09,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011854914] [2021-05-02 16:53:09,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:09,255 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:09,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137294338] [2021-05-02 16:53:09,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-05-02 16:53:09,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 16:53:09,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:09,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 16:53:09,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:09,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,460 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:53:09,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:09,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011854914] [2021-05-02 16:53:09,460 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:09,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137294338] [2021-05-02 16:53:09,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137294338] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:09,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:09,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 16:53:09,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260434832] [2021-05-02 16:53:09,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 16:53:09,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:09,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 16:53:09,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:53:09,462 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:53:09,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:09,552 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2021-05-02 16:53:09,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 16:53:09,553 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 52 [2021-05-02 16:53:09,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:09,553 INFO L225 Difference]: With dead ends: 66 [2021-05-02 16:53:09,553 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 16:53:09,555 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:53:09,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 16:53:09,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-02 16:53:09,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:53:09,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-05-02 16:53:09,562 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 52 [2021-05-02 16:53:09,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:09,563 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-05-02 16:53:09,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:53:09,563 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-05-02 16:53:09,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 16:53:09,563 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:09,563 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:09,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:09,786 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:09,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:09,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1795671114, now seen corresponding path program 5 times [2021-05-02 16:53:09,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:09,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628070522] [2021-05-02 16:53:09,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:09,792 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:09,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651371379] [2021-05-02 16:53:09,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-05-02 16:53:09,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 16:53:09,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:09,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 16:53:09,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:09,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 14 proven. 73 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 16:53:10,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:10,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628070522] [2021-05-02 16:53:10,142 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:10,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651371379] [2021-05-02 16:53:10,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651371379] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:10,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:10,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 16:53:10,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608409275] [2021-05-02 16:53:10,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 16:53:10,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:10,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 16:53:10,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-05-02 16:53:10,144 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:53:10,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:10,298 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-05-02 16:53:10,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 16:53:10,299 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 58 [2021-05-02 16:53:10,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:10,303 INFO L225 Difference]: With dead ends: 68 [2021-05-02 16:53:10,303 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 16:53:10,304 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 129.7ms TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-02 16:53:10,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 16:53:10,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-02 16:53:10,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:53:10,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-05-02 16:53:10,308 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2021-05-02 16:53:10,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:10,309 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-05-02 16:53:10,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:53:10,309 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-05-02 16:53:10,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 16:53:10,309 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:10,309 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:10,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:10,532 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:10,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:10,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1633541723, now seen corresponding path program 6 times [2021-05-02 16:53:10,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:10,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388501214] [2021-05-02 16:53:10,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:10,537 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:10,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1473308718] [2021-05-02 16:53:10,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-05-02 16:53:10,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 16:53:10,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:10,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 16:53:10,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:10,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:53:10,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:10,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388501214] [2021-05-02 16:53:10,878 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:10,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473308718] [2021-05-02 16:53:10,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473308718] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:10,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:10,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 16:53:10,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505536313] [2021-05-02 16:53:10,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 16:53:10,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:10,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 16:53:10,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:53:10,879 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:53:10,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:10,988 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2021-05-02 16:53:10,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 16:53:10,989 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 60 [2021-05-02 16:53:10,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:10,990 INFO L225 Difference]: With dead ends: 74 [2021-05-02 16:53:10,990 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 16:53:10,990 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-05-02 16:53:10,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 16:53:10,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-02 16:53:10,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:53:10,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-05-02 16:53:10,995 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 60 [2021-05-02 16:53:10,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:10,995 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-05-02 16:53:10,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:53:10,995 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-05-02 16:53:10,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 16:53:10,996 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:10,996 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:11,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:11,200 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:11,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:11,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1180930233, now seen corresponding path program 6 times [2021-05-02 16:53:11,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:11,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990871571] [2021-05-02 16:53:11,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:11,206 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:11,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371109960] [2021-05-02 16:53:11,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-05-02 16:53:11,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 16:53:11,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:11,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 16:53:11,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:11,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:11,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:11,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:11,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:11,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:11,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:11,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:11,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:11,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:11,726 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 22 proven. 94 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 16:53:11,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:11,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990871571] [2021-05-02 16:53:11,726 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:11,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371109960] [2021-05-02 16:53:11,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371109960] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:11,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:11,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 16:53:11,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485498045] [2021-05-02 16:53:11,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 16:53:11,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:11,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 16:53:11,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:53:11,729 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:53:11,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:11,910 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2021-05-02 16:53:11,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 16:53:11,911 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 66 [2021-05-02 16:53:11,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:11,911 INFO L225 Difference]: With dead ends: 76 [2021-05-02 16:53:11,912 INFO L226 Difference]: Without dead ends: 71 [2021-05-02 16:53:11,912 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-02 16:53:11,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-02 16:53:11,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-02 16:53:11,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:53:11,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-05-02 16:53:11,917 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 66 [2021-05-02 16:53:11,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:11,918 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-05-02 16:53:11,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:53:11,918 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-05-02 16:53:11,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 16:53:11,918 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:11,918 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:12,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 16:53:12,129 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:12,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:12,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1699217054, now seen corresponding path program 7 times [2021-05-02 16:53:12,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:12,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166321833] [2021-05-02 16:53:12,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:12,134 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:12,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895093268] [2021-05-02 16:53:12,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-05-02 16:53:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:53:12,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:53:12,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:12,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:12,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:12,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:12,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:12,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:12,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:12,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:12,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:12,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:12,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:12,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:12,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:12,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:12,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:12,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:12,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:12,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:12,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:12,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:12,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:12,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:12,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:12,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:12,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:12,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:12,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:53:12,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:12,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166321833] [2021-05-02 16:53:12,381 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:12,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895093268] [2021-05-02 16:53:12,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895093268] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:12,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:12,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 16:53:12,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155375257] [2021-05-02 16:53:12,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 16:53:12,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:12,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 16:53:12,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:53:12,387 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:53:14,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:14,516 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2021-05-02 16:53:14,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 16:53:14,517 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 68 [2021-05-02 16:53:14,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:14,517 INFO L225 Difference]: With dead ends: 82 [2021-05-02 16:53:14,517 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 16:53:14,518 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-05-02 16:53:14,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 16:53:14,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-02 16:53:14,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:53:14,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-05-02 16:53:14,523 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 68 [2021-05-02 16:53:14,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:14,523 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-05-02 16:53:14,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:53:14,523 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-05-02 16:53:14,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 16:53:14,524 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:14,524 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:14,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 16:53:14,745 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:14,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:14,745 INFO L82 PathProgramCache]: Analyzing trace with hash -763940164, now seen corresponding path program 7 times [2021-05-02 16:53:14,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:14,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343841060] [2021-05-02 16:53:14,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:14,750 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:14,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189902232] [2021-05-02 16:53:14,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-05-02 16:53:15,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:53:15,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 16:53:15,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:15,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:15,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:15,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:15,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:15,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:15,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:15,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:15,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:15,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:15,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:15,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:15,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:15,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:15,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:15,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:15,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:15,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:15,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:15,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:15,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:15,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 15 proven. 134 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-02 16:53:15,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:15,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343841060] [2021-05-02 16:53:15,579 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:15,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189902232] [2021-05-02 16:53:15,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189902232] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:15,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:15,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 16:53:15,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650647431] [2021-05-02 16:53:15,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 16:53:15,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:15,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 16:53:15,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-05-02 16:53:15,581 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:53:15,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:15,817 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2021-05-02 16:53:15,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 16:53:15,817 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 74 [2021-05-02 16:53:15,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:15,818 INFO L225 Difference]: With dead ends: 84 [2021-05-02 16:53:15,818 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 16:53:15,818 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-02 16:53:15,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 16:53:15,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-02 16:53:15,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 16:53:15,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2021-05-02 16:53:15,823 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 74 [2021-05-02 16:53:15,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:15,823 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2021-05-02 16:53:15,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:53:15,823 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2021-05-02 16:53:15,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 16:53:15,824 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:15,824 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:16,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 16:53:16,031 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:16,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:16,031 INFO L82 PathProgramCache]: Analyzing trace with hash 989539297, now seen corresponding path program 8 times [2021-05-02 16:53:16,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:16,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265744978] [2021-05-02 16:53:16,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:16,036 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:16,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343875022] [2021-05-02 16:53:16,036 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 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 [2021-05-02 16:53:16,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:53:16,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:16,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 16:53:16,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:16,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:53:16,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:16,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265744978] [2021-05-02 16:53:16,287 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:16,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343875022] [2021-05-02 16:53:16,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343875022] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:16,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:16,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 16:53:16,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701973588] [2021-05-02 16:53:16,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 16:53:16,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:16,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 16:53:16,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:53:16,288 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:53:16,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:16,480 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2021-05-02 16:53:16,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 16:53:16,481 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 76 [2021-05-02 16:53:16,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:16,481 INFO L225 Difference]: With dead ends: 90 [2021-05-02 16:53:16,481 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 16:53:16,482 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-05-02 16:53:16,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 16:53:16,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-05-02 16:53:16,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 16:53:16,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-05-02 16:53:16,487 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 76 [2021-05-02 16:53:16,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:16,487 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-05-02 16:53:16,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:53:16,487 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-05-02 16:53:16,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 16:53:16,488 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:16,488 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:16,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 16:53:16,708 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:16,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:16,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1500110401, now seen corresponding path program 8 times [2021-05-02 16:53:16,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:16,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942393390] [2021-05-02 16:53:16,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:16,713 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:16,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110417378] [2021-05-02 16:53:16,713 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 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 [2021-05-02 16:53:17,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:53:17,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:17,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 16:53:17,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:17,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:20,107 WARN L860 $PredicateComparison]: unable to prove that (and (= c_main_~c~0 0) (= c_main_~y~0 0) (= (mod (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0)) 4) 0)) is different from true [2021-05-02 16:53:22,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:22,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:22,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:22,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:22,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:22,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:22,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:22,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 17 proven. 161 refuted. 0 times theorem prover too weak. 120 trivial. 8 not checked. [2021-05-02 16:53:22,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:22,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942393390] [2021-05-02 16:53:22,827 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:22,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110417378] [2021-05-02 16:53:22,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110417378] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:22,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:22,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 16:53:22,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956002469] [2021-05-02 16:53:22,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 16:53:22,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:22,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 16:53:22,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=210, Unknown=2, NotChecked=28, Total=272 [2021-05-02 16:53:22,829 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 16:53:23,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:23,118 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2021-05-02 16:53:23,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 16:53:23,119 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 82 [2021-05-02 16:53:23,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:23,120 INFO L225 Difference]: With dead ends: 92 [2021-05-02 16:53:23,120 INFO L226 Difference]: Without dead ends: 87 [2021-05-02 16:53:23,121 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 5606.7ms TimeCoverageRelationStatistics Valid=47, Invalid=297, Unknown=2, NotChecked=34, Total=380 [2021-05-02 16:53:23,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-02 16:53:23,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-05-02 16:53:23,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 16:53:23,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2021-05-02 16:53:23,127 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 82 [2021-05-02 16:53:23,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:23,127 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2021-05-02 16:53:23,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 16:53:23,127 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2021-05-02 16:53:23,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 16:53:23,128 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:23,128 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:23,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 16:53:23,332 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:23,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:23,333 INFO L82 PathProgramCache]: Analyzing trace with hash -2095421916, now seen corresponding path program 9 times [2021-05-02 16:53:23,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:23,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347335631] [2021-05-02 16:53:23,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:23,337 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:23,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640738807] [2021-05-02 16:53:23,337 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 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 [2021-05-02 16:53:23,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 16:53:23,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:23,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 16:53:23,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:23,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:53:23,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:23,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347335631] [2021-05-02 16:53:23,992 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:23,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640738807] [2021-05-02 16:53:23,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640738807] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:23,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:23,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 16:53:23,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454486907] [2021-05-02 16:53:23,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 16:53:23,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:23,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 16:53:23,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 16:53:23,993 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 16:53:24,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:24,186 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2021-05-02 16:53:24,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 16:53:24,186 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 84 [2021-05-02 16:53:24,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:24,188 INFO L225 Difference]: With dead ends: 98 [2021-05-02 16:53:24,188 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 16:53:24,188 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-05-02 16:53:24,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 16:53:24,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-02 16:53:24,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 16:53:24,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-05-02 16:53:24,194 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 84 [2021-05-02 16:53:24,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:24,194 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-05-02 16:53:24,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 16:53:24,194 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-05-02 16:53:24,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 16:53:24,195 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:24,195 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:24,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:24,399 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:24,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:24,399 INFO L82 PathProgramCache]: Analyzing trace with hash 488857026, now seen corresponding path program 9 times [2021-05-02 16:53:24,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:24,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285227973] [2021-05-02 16:53:24,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:24,406 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:24,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1994509212] [2021-05-02 16:53:24,406 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 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 [2021-05-02 16:53:24,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 16:53:24,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:24,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-02 16:53:24,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:26,891 WARN L860 $PredicateComparison]: unable to prove that (and (= c_main_~c~0 0) (= c_main_~y~0 0) (= (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0) (* 2 (* c_main_~y~0 c_main_~y~0 c_main_~y~0))) 0)) is different from true [2021-05-02 16:53:26,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:26,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:26,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:26,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:26,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:26,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:26,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:26,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:27,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:27,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:27,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:27,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:27,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:27,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:27,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:27,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:27,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:27,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:27,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:27,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:27,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:27,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:27,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:49,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:49,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:49,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:49,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 59 proven. 195 refuted. 0 times theorem prover too weak. 117 trivial. 9 not checked. [2021-05-02 16:53:49,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:49,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285227973] [2021-05-02 16:53:49,750 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:49,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994509212] [2021-05-02 16:53:49,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994509212] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:49,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:49,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 16:53:49,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704237447] [2021-05-02 16:53:49,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 16:53:49,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:49,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 16:53:49,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=304, Unknown=2, NotChecked=34, Total=380 [2021-05-02 16:53:49,751 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 16:53:52,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:52,174 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2021-05-02 16:53:52,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 16:53:52,174 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 90 [2021-05-02 16:53:52,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:52,175 INFO L225 Difference]: With dead ends: 100 [2021-05-02 16:53:52,175 INFO L226 Difference]: Without dead ends: 95 [2021-05-02 16:53:52,176 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 24793.0ms TimeCoverageRelationStatistics Valid=56, Invalid=408, Unknown=2, NotChecked=40, Total=506 [2021-05-02 16:53:52,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-02 16:53:52,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-02 16:53:52,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 16:53:52,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2021-05-02 16:53:52,181 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 90 [2021-05-02 16:53:52,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:52,182 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2021-05-02 16:53:52,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 16:53:52,182 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2021-05-02 16:53:52,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 16:53:52,183 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:52,183 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:52,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-02 16:53:52,387 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:52,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:52,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1958171289, now seen corresponding path program 10 times [2021-05-02 16:53:52,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:52,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724124582] [2021-05-02 16:53:52,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:52,398 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:52,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44495001] [2021-05-02 16:53:52,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-05-02 16:53:53,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:53:53,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-02 16:53:53,119 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 16:53:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 16:53:53,173 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 16:53:53,309 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 16:53:53,309 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 16:53:53,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:53,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 04:53:53 BoogieIcfgContainer [2021-05-02 16:53:53,562 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 16:53:53,563 INFO L168 Benchmark]: Toolchain (without parser) took 245919.60 ms. Allocated memory was 127.9 MB in the beginning and 169.9 MB in the end (delta: 41.9 MB). Free memory was 102.2 MB in the beginning and 51.6 MB in the end (delta: 50.6 MB). Peak memory consumption was 94.2 MB. Max. memory is 8.0 GB. [2021-05-02 16:53:53,563 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 127.9 MB. Free memory is still 107.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 16:53:53,563 INFO L168 Benchmark]: CACSL2BoogieTranslator took 162.96 ms. Allocated memory is still 127.9 MB. Free memory was 102.0 MB in the beginning and 110.3 MB in the end (delta: -8.3 MB). Peak memory consumption was 13.1 MB. Max. memory is 8.0 GB. [2021-05-02 16:53:53,563 INFO L168 Benchmark]: Boogie Preprocessor took 49.53 ms. Allocated memory is still 127.9 MB. Free memory was 110.3 MB in the beginning and 108.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 16:53:53,563 INFO L168 Benchmark]: RCFGBuilder took 235.36 ms. Allocated memory is still 127.9 MB. Free memory was 108.2 MB in the beginning and 94.1 MB in the end (delta: 14.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 16:53:53,563 INFO L168 Benchmark]: TraceAbstraction took 245464.84 ms. Allocated memory was 127.9 MB in the beginning and 169.9 MB in the end (delta: 41.9 MB). Free memory was 94.0 MB in the beginning and 51.6 MB in the end (delta: 42.3 MB). Peak memory consumption was 86.4 MB. Max. memory is 8.0 GB. [2021-05-02 16:53:53,563 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 127.9 MB. Free memory is still 107.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 162.96 ms. Allocated memory is still 127.9 MB. Free memory was 102.0 MB in the beginning and 110.3 MB in the end (delta: -8.3 MB). Peak memory consumption was 13.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.53 ms. Allocated memory is still 127.9 MB. Free memory was 110.3 MB in the beginning and 108.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 235.36 ms. Allocated memory is still 127.9 MB. Free memory was 108.2 MB in the beginning and 94.1 MB in the end (delta: 14.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 245464.84 ms. Allocated memory was 127.9 MB in the beginning and 169.9 MB in the end (delta: 41.9 MB). Free memory was 94.0 MB in the beginning and 51.6 MB in the end (delta: 42.3 MB). Peak memory consumption was 86.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [\old(counter)=15, counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [\old(counter)=0, c=0, counter=0, k=11, x=0, y=0] [L27] EXPR counter++ VAL [\old(counter)=0, c=0, counter=1, counter++=0, k=11, x=0, y=0] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=0, counter=1, k=11, x=0, y=0] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=1, counter=1, k=11, x=1, y=1] [L27] EXPR counter++ VAL [\old(counter)=0, c=1, counter=2, counter++=1, k=11, x=1, y=1] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=1, counter=2, k=11, x=1, y=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=2, counter=2, k=11, x=9, y=2] [L27] EXPR counter++ VAL [\old(counter)=0, c=2, counter=3, counter++=2, k=11, x=9, y=2] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=2, counter=3, k=11, x=9, y=2] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=3, counter=3, k=11, x=36, y=3] [L27] EXPR counter++ VAL [\old(counter)=0, c=3, counter=4, counter++=3, k=11, x=36, y=3] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=3, counter=4, k=11, x=36, y=3] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=4, counter=4, k=11, x=100, y=4] [L27] EXPR counter++ VAL [\old(counter)=0, c=4, counter=5, counter++=4, k=11, x=100, y=4] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=4, counter=5, k=11, x=100, y=4] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=5, counter=5, k=11, x=225, y=5] [L27] EXPR counter++ VAL [\old(counter)=0, c=5, counter=6, counter++=5, k=11, x=225, y=5] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=5, counter=6, k=11, x=225, y=5] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=6, counter=6, k=11, x=441, y=6] [L27] EXPR counter++ VAL [\old(counter)=0, c=6, counter=7, counter++=6, k=11, x=441, y=6] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=6, counter=7, k=11, x=441, y=6] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=7, counter=7, k=11, x=784, y=7] [L27] EXPR counter++ VAL [\old(counter)=0, c=7, counter=8, counter++=7, k=11, x=784, y=7] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=7, counter=8, k=11, x=784, y=7] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=8, counter=8, k=11, x=1296, y=8] [L27] EXPR counter++ VAL [\old(counter)=0, c=8, counter=9, counter++=8, k=11, x=1296, y=8] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=8, counter=9, k=11, x=1296, y=8] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=9, counter=9, k=11, x=2025, y=9] [L27] EXPR counter++ VAL [\old(counter)=0, c=9, counter=10, counter++=9, k=11, x=2025, y=9] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=9, counter=10, k=11, x=2025, y=9] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=10, counter=10, k=11, x=3025, y=10] [L27] EXPR counter++ VAL [\old(counter)=0, c=10, counter=11, counter++=10, k=11, x=3025, y=10] [L27] COND FALSE !(counter++<10) [L37] CALL __VERIFIER_assert(k*y - (y*y) == 0) VAL [\old(cond)=0, \old(counter)=0, counter=11] [L10] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] [L12] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 245375.9ms, OverallIterations: 25, TraceHistogramMax: 11, EmptinessCheckTime: 28.4ms, AutomataDifference: 200780.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 591 SDtfs, 153 SDslu, 3667 SDs, 0 SdLazy, 2577 SolverSat, 79 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 199222.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1159 GetRequests, 883 SyntacticMatches, 8 SemanticMatches, 268 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 32123.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=24, InterpolantAutomatonStates: 279, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 194.9ms AutomataMinimizationTime, 24 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 238.7ms SsaConstructionTime, 3665.1ms SatisfiabilityAnalysisTime, 34096.7ms InterpolantComputationTime, 1201 NumberOfCodeBlocks, 1185 NumberOfCodeBlocksAsserted, 80 NumberOfCheckSat, 1085 ConstructedInterpolants, 0 QuantifiedInterpolants, 4230 SizeOfPredicates, 100 NumberOfNonLiveVariables, 4479 ConjunctsInSsa, 545 ConjunctsInUnsatCore, 24 InterpolantComputations, 3 PerfectInterpolantSequences, 785/2630 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...