/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/egcd2-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:34:05,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:34:05,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:34:05,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:34:05,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:34:05,357 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:34:05,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:34:05,359 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:34:05,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:34:05,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:34:05,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:34:05,363 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:34:05,364 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:34:05,365 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:34:05,366 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:34:05,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:34:05,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:34:05,379 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:34:05,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:34:05,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:34:05,385 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 [2021-05-06 02:34:05,437 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:34:05,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:34:05,439 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:34:05,439 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:34:05,439 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:34:05,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:34:05,439 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:34:05,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:34:05,440 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:34:05,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:34:05,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:34:05,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:34:05,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:34:05,440 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:34:05,441 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:34:05,441 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:34:05,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:34:05,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:34:05,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:34:05,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:34:05,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:34:05,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:34:05,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:34:05,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:34:05,442 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:34:05,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:34:05,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:34:05,442 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:34:05,443 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:34:05,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:34:05,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:34:05,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:34:05,754 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:34:05,755 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:34:05,756 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c [2021-05-06 02:34:05,815 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8042a2c5a/242eb37a4a5c462b8658e44133704816/FLAG6ac390a6d [2021-05-06 02:34:06,220 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:34:06,221 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c [2021-05-06 02:34:06,231 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8042a2c5a/242eb37a4a5c462b8658e44133704816/FLAG6ac390a6d [2021-05-06 02:34:06,250 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8042a2c5a/242eb37a4a5c462b8658e44133704816 [2021-05-06 02:34:06,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:34:06,254 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:34:06,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:34:06,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:34:06,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:34:06,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:34:06" (1/1) ... [2021-05-06 02:34:06,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e0af76c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:34:06, skipping insertion in model container [2021-05-06 02:34:06,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:34:06" (1/1) ... [2021-05-06 02:34:06,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:34:06,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:34:06,429 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/egcd2-ll_valuebound50.c[490,503] [2021-05-06 02:34:06,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:34:06,467 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:34:06,501 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/egcd2-ll_valuebound50.c[490,503] [2021-05-06 02:34:06,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:34:06,551 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:34:06,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:34:06 WrapperNode [2021-05-06 02:34:06,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:34:06,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:34:06,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:34:06,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:34:06,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:34:06" (1/1) ... [2021-05-06 02:34:06,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:34:06" (1/1) ... [2021-05-06 02:34:06,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:34:06" (1/1) ... [2021-05-06 02:34:06,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:34:06" (1/1) ... [2021-05-06 02:34:06,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:34:06" (1/1) ... [2021-05-06 02:34:06,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:34:06" (1/1) ... [2021-05-06 02:34:06,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:34:06" (1/1) ... [2021-05-06 02:34:06,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:34:06,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:34:06,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:34:06,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:34:06,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:34:06" (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 [2021-05-06 02:34:06,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:34:06,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:34:06,672 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:34:06,673 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:34:06,673 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:34:06,673 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:34:06,674 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:34:06,674 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:34:06,674 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:34:06,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:34:06,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:34:06,675 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:34:06,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:34:06,675 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:34:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:34:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:34:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:34:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:34:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:34:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:34:06,990 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:34:06,990 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 02:34:06,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:34:06 BoogieIcfgContainer [2021-05-06 02:34:06,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:34:06,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:34:06,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:34:06,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:34:06,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:34:06" (1/3) ... [2021-05-06 02:34:06,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6655eeaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:34:06, skipping insertion in model container [2021-05-06 02:34:06,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:34:06" (2/3) ... [2021-05-06 02:34:06,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6655eeaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:34:06, skipping insertion in model container [2021-05-06 02:34:06,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:34:06" (3/3) ... [2021-05-06 02:34:06,997 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound50.c [2021-05-06 02:34:07,002 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:34:07,005 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:34:07,017 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:34:07,034 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:34:07,035 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:34:07,035 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:34:07,035 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:34:07,035 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:34:07,035 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:34:07,035 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:34:07,035 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:34:07,048 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 02:34:07,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 02:34:07,052 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:07,053 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:07,053 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:07,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:07,057 INFO L82 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 1 times [2021-05-06 02:34:07,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:07,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667240173] [2021-05-06 02:34:07,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:07,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:07,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:34:07,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:07,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:34:07,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:07,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 02:34:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:07,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 02:34:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:07,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 02:34:07,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:07,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-06 02:34:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:07,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-06 02:34:07,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 02:34:07,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:07,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667240173] [2021-05-06 02:34:07,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667240173] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:34:07,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:34:07,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:34:07,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564209480] [2021-05-06 02:34:07,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:34:07,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:07,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:34:07,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:34:07,294 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:34:07,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:07,510 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2021-05-06 02:34:07,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:34:07,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2021-05-06 02:34:07,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:07,518 INFO L225 Difference]: With dead ends: 73 [2021-05-06 02:34:07,518 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 02:34:07,521 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:34:07,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 02:34:07,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 02:34:07,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 02:34:07,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-06 02:34:07,555 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2021-05-06 02:34:07,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:07,556 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-06 02:34:07,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:34:07,556 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-06 02:34:07,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 02:34:07,558 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:07,558 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:07,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:34:07,558 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:07,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:07,559 INFO L82 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 1 times [2021-05-06 02:34:07,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:07,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888098072] [2021-05-06 02:34:07,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:07,580 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:07,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916762287] [2021-05-06 02:34:07,581 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 [2021-05-06 02:34:07,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:07,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:34:07,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:07,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 02:34:07,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:07,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888098072] [2021-05-06 02:34:07,919 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:07,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916762287] [2021-05-06 02:34:07,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916762287] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:07,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:07,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:34:07,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233913332] [2021-05-06 02:34:07,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:34:07,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:07,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:34:07,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:34:07,925 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:34:08,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:08,061 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-05-06 02:34:08,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:34:08,063 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2021-05-06 02:34:08,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:08,066 INFO L225 Difference]: With dead ends: 52 [2021-05-06 02:34:08,066 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 02:34:08,067 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:34:08,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 02:34:08,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 02:34:08,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 02:34:08,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-06 02:34:08,102 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2021-05-06 02:34:08,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:08,102 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-06 02:34:08,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:34:08,103 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-06 02:34:08,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 02:34:08,104 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:08,104 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:08,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:34:08,321 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:08,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:08,322 INFO L82 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 1 times [2021-05-06 02:34:08,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:08,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208449766] [2021-05-06 02:34:08,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:08,337 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:08,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626700081] [2021-05-06 02:34:08,337 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 [2021-05-06 02:34:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:08,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:34:08,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:08,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:08,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:08,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:08,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:08,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:08,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:08,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:08,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:08,545 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 02:34:08,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:08,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208449766] [2021-05-06 02:34:08,545 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:08,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626700081] [2021-05-06 02:34:08,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626700081] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:08,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:08,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:34:08,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751376703] [2021-05-06 02:34:08,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:34:08,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:08,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:34:08,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:34:08,547 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:34:08,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:08,732 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2021-05-06 02:34:08,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:34:08,732 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2021-05-06 02:34:08,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:08,734 INFO L225 Difference]: With dead ends: 57 [2021-05-06 02:34:08,734 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 02:34:08,735 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:34:08,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 02:34:08,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2021-05-06 02:34:08,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 02:34:08,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-05-06 02:34:08,751 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2021-05-06 02:34:08,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:08,752 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-05-06 02:34:08,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:34:08,752 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-05-06 02:34:08,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 02:34:08,753 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:08,753 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:08,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:08,977 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:08,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:08,978 INFO L82 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 1 times [2021-05-06 02:34:08,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:08,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461548465] [2021-05-06 02:34:08,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:09,000 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:09,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [762150162] [2021-05-06 02:34:09,000 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 [2021-05-06 02:34:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:09,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:34:09,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:09,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 02:34:09,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:09,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461548465] [2021-05-06 02:34:09,240 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:09,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762150162] [2021-05-06 02:34:09,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762150162] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:09,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:09,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:34:09,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753550995] [2021-05-06 02:34:09,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:34:09,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:09,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:34:09,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:34:09,243 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:34:09,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:09,368 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2021-05-06 02:34:09,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:34:09,369 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2021-05-06 02:34:09,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:09,374 INFO L225 Difference]: With dead ends: 56 [2021-05-06 02:34:09,374 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 02:34:09,377 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:34:09,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 02:34:09,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-06 02:34:09,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:34:09,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-05-06 02:34:09,405 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 50 [2021-05-06 02:34:09,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:09,406 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-05-06 02:34:09,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:34:09,406 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-05-06 02:34:09,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 02:34:09,407 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:09,407 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:09,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:09,608 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:09,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:09,609 INFO L82 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 1 times [2021-05-06 02:34:09,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:09,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901305921] [2021-05-06 02:34:09,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:09,631 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:09,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697446083] [2021-05-06 02:34:09,632 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 [2021-05-06 02:34:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:09,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:34:09,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:09,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 02:34:09,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:09,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901305921] [2021-05-06 02:34:09,920 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:09,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697446083] [2021-05-06 02:34:09,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697446083] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:09,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:09,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:34:09,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858417869] [2021-05-06 02:34:09,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:34:09,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:09,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:34:09,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:34:09,922 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 02:34:10,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:10,059 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2021-05-06 02:34:10,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:34:10,060 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-06 02:34:10,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:10,061 INFO L225 Difference]: With dead ends: 60 [2021-05-06 02:34:10,061 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 02:34:10,061 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:34:10,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 02:34:10,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-06 02:34:10,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:34:10,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-05-06 02:34:10,071 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 55 [2021-05-06 02:34:10,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:10,072 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-05-06 02:34:10,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 02:34:10,072 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-05-06 02:34:10,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 02:34:10,073 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:10,073 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:10,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:10,294 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:10,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:10,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 1 times [2021-05-06 02:34:10,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:10,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051642802] [2021-05-06 02:34:10,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:10,309 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:10,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167587297] [2021-05-06 02:34:10,310 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 [2021-05-06 02:34:10,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:10,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 02:34:10,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:10,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,565 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-06 02:34:10,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:10,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051642802] [2021-05-06 02:34:10,565 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:10,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167587297] [2021-05-06 02:34:10,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167587297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:10,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:10,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:34:10,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412286516] [2021-05-06 02:34:10,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:34:10,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:10,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:34:10,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:34:10,567 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-06 02:34:10,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:10,673 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-05-06 02:34:10,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:34:10,673 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2021-05-06 02:34:10,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:10,674 INFO L225 Difference]: With dead ends: 64 [2021-05-06 02:34:10,674 INFO L226 Difference]: Without dead ends: 62 [2021-05-06 02:34:10,675 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:34:10,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-06 02:34:10,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-06 02:34:10,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:34:10,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2021-05-06 02:34:10,685 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 60 [2021-05-06 02:34:10,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:10,685 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2021-05-06 02:34:10,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-06 02:34:10,686 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2021-05-06 02:34:10,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-06 02:34:10,687 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:10,687 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:10,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 02:34:10,900 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:10,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:10,901 INFO L82 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 1 times [2021-05-06 02:34:10,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:10,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693642371] [2021-05-06 02:34:10,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:10,912 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:10,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965604889] [2021-05-06 02:34:10,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 02:34:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:10,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 02:34:10,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:11,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 02:34:11,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:11,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693642371] [2021-05-06 02:34:11,179 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:11,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965604889] [2021-05-06 02:34:11,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965604889] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:11,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:11,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:34:11,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163936915] [2021-05-06 02:34:11,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:34:11,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:11,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:34:11,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:34:11,180 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:34:11,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:11,406 INFO L93 Difference]: Finished difference Result 80 states and 101 transitions. [2021-05-06 02:34:11,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:34:11,406 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 67 [2021-05-06 02:34:11,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:11,408 INFO L225 Difference]: With dead ends: 80 [2021-05-06 02:34:11,408 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 02:34:11,409 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:34:11,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 02:34:11,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2021-05-06 02:34:11,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:34:11,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-05-06 02:34:11,422 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 67 [2021-05-06 02:34:11,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:11,422 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-05-06 02:34:11,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:34:11,422 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-05-06 02:34:11,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 02:34:11,423 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:11,423 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:11,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:11,648 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:11,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:11,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 1 times [2021-05-06 02:34:11,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:11,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590715432] [2021-05-06 02:34:11,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:11,667 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:11,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179719426] [2021-05-06 02:34:11,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 02:34:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:11,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:34:11,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:11,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,916 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 02:34:11,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:11,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590715432] [2021-05-06 02:34:11,917 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:11,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179719426] [2021-05-06 02:34:11,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179719426] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:11,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:11,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:34:11,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128647658] [2021-05-06 02:34:11,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:34:11,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:11,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:34:11,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:34:11,920 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:34:12,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:12,103 INFO L93 Difference]: Finished difference Result 112 states and 152 transitions. [2021-05-06 02:34:12,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:34:12,103 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-06 02:34:12,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:12,107 INFO L225 Difference]: With dead ends: 112 [2021-05-06 02:34:12,108 INFO L226 Difference]: Without dead ends: 104 [2021-05-06 02:34:12,108 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:34:12,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-06 02:34:12,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2021-05-06 02:34:12,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 35 states have call successors, (35), 9 states have call predecessors, (35), 8 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-06 02:34:12,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 128 transitions. [2021-05-06 02:34:12,140 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 128 transitions. Word has length 69 [2021-05-06 02:34:12,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:12,141 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 128 transitions. [2021-05-06 02:34:12,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:34:12,141 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 128 transitions. [2021-05-06 02:34:12,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 02:34:12,143 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:12,143 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:12,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:12,352 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:12,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:12,352 INFO L82 PathProgramCache]: Analyzing trace with hash -622831482, now seen corresponding path program 1 times [2021-05-06 02:34:12,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:12,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167621936] [2021-05-06 02:34:12,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:12,361 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:12,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910768798] [2021-05-06 02:34:12,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 02:34:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:12,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 02:34:12,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:12,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 02:34:12,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:12,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167621936] [2021-05-06 02:34:12,613 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:12,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910768798] [2021-05-06 02:34:12,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910768798] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:12,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:12,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:34:12,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20372318] [2021-05-06 02:34:12,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:34:12,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:12,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:34:12,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:34:12,614 INFO L87 Difference]: Start difference. First operand 95 states and 128 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:34:12,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:12,879 INFO L93 Difference]: Finished difference Result 111 states and 149 transitions. [2021-05-06 02:34:12,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:34:12,880 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 70 [2021-05-06 02:34:12,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:12,883 INFO L225 Difference]: With dead ends: 111 [2021-05-06 02:34:12,883 INFO L226 Difference]: Without dead ends: 109 [2021-05-06 02:34:12,883 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:34:12,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-06 02:34:12,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2021-05-06 02:34:12,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 56 states have internal predecessors, (63), 35 states have call successors, (35), 10 states have call predecessors, (35), 9 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-06 02:34:12,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 131 transitions. [2021-05-06 02:34:12,905 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 131 transitions. Word has length 70 [2021-05-06 02:34:12,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:12,906 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 131 transitions. [2021-05-06 02:34:12,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:34:12,907 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 131 transitions. [2021-05-06 02:34:12,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 02:34:12,908 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:12,908 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:13,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 02:34:13,129 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:13,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:13,129 INFO L82 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 2 times [2021-05-06 02:34:13,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:13,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406899742] [2021-05-06 02:34:13,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:13,139 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:13,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036072953] [2021-05-06 02:34:13,139 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 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 [2021-05-06 02:34:13,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:34:13,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:13,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 02:34:13,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:13,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,365 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 02:34:13,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:13,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406899742] [2021-05-06 02:34:13,366 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:13,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036072953] [2021-05-06 02:34:13,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036072953] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:13,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:13,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:34:13,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287617551] [2021-05-06 02:34:13,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:34:13,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:13,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:34:13,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:34:13,368 INFO L87 Difference]: Start difference. First operand 99 states and 131 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 02:34:13,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:13,488 INFO L93 Difference]: Finished difference Result 109 states and 143 transitions. [2021-05-06 02:34:13,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:34:13,488 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2021-05-06 02:34:13,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:13,489 INFO L225 Difference]: With dead ends: 109 [2021-05-06 02:34:13,489 INFO L226 Difference]: Without dead ends: 106 [2021-05-06 02:34:13,490 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:34:13,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-06 02:34:13,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-05-06 02:34:13,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 61 states have internal predecessors, (67), 37 states have call successors, (37), 11 states have call predecessors, (37), 10 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 02:34:13,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2021-05-06 02:34:13,506 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 139 transitions. Word has length 75 [2021-05-06 02:34:13,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:13,507 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 139 transitions. [2021-05-06 02:34:13,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 02:34:13,507 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 139 transitions. [2021-05-06 02:34:13,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 02:34:13,508 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:13,508 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:13,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:13,729 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:13,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:13,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 3 times [2021-05-06 02:34:13,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:13,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381733520] [2021-05-06 02:34:13,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:13,737 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:13,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11568026] [2021-05-06 02:34:13,737 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 [2021-05-06 02:34:13,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:34:13,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:13,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 02:34:13,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:13,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-05-06 02:34:14,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:14,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381733520] [2021-05-06 02:34:14,181 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:14,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11568026] [2021-05-06 02:34:14,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11568026] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:14,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:14,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:34:14,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021453975] [2021-05-06 02:34:14,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:34:14,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:14,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:34:14,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:34:14,183 INFO L87 Difference]: Start difference. First operand 106 states and 139 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:34:14,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:14,505 INFO L93 Difference]: Finished difference Result 134 states and 175 transitions. [2021-05-06 02:34:14,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:34:14,505 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2021-05-06 02:34:14,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:14,507 INFO L225 Difference]: With dead ends: 134 [2021-05-06 02:34:14,507 INFO L226 Difference]: Without dead ends: 132 [2021-05-06 02:34:14,507 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 212.6ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:34:14,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-06 02:34:14,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2021-05-06 02:34:14,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 74 states have internal predecessors, (82), 45 states have call successors, (45), 13 states have call predecessors, (45), 12 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-06 02:34:14,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 170 transitions. [2021-05-06 02:34:14,528 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 170 transitions. Word has length 80 [2021-05-06 02:34:14,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:14,528 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 170 transitions. [2021-05-06 02:34:14,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:34:14,529 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 170 transitions. [2021-05-06 02:34:14,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 02:34:14,529 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:14,530 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:14,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:14,746 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:14,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:14,746 INFO L82 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 4 times [2021-05-06 02:34:14,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:14,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581649448] [2021-05-06 02:34:14,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:14,755 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:14,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17215473] [2021-05-06 02:34:14,755 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 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 [2021-05-06 02:34:14,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:34:14,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:14,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 02:34:14,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:15,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,045 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-05-06 02:34:15,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:15,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581649448] [2021-05-06 02:34:15,045 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:15,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17215473] [2021-05-06 02:34:15,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17215473] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:15,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:15,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:34:15,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070576020] [2021-05-06 02:34:15,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:34:15,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:15,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:34:15,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:34:15,047 INFO L87 Difference]: Start difference. First operand 129 states and 170 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 02:34:15,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:15,278 INFO L93 Difference]: Finished difference Result 138 states and 178 transitions. [2021-05-06 02:34:15,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:34:15,279 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 85 [2021-05-06 02:34:15,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:15,280 INFO L225 Difference]: With dead ends: 138 [2021-05-06 02:34:15,280 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 02:34:15,281 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:34:15,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 02:34:15,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2021-05-06 02:34:15,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 77 states have internal predecessors, (85), 45 states have call successors, (45), 14 states have call predecessors, (45), 13 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-06 02:34:15,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 173 transitions. [2021-05-06 02:34:15,300 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 173 transitions. Word has length 85 [2021-05-06 02:34:15,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:15,301 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 173 transitions. [2021-05-06 02:34:15,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 02:34:15,301 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 173 transitions. [2021-05-06 02:34:15,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 02:34:15,302 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:15,302 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:15,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 02:34:15,526 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:15,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:15,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1507900548, now seen corresponding path program 2 times [2021-05-06 02:34:15,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:15,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759924960] [2021-05-06 02:34:15,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:15,534 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:15,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1337531836] [2021-05-06 02:34:15,534 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 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 [2021-05-06 02:34:15,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:34:15,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:15,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 02:34:15,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:15,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 30 proven. 32 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-05-06 02:34:15,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:15,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759924960] [2021-05-06 02:34:15,950 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:15,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337531836] [2021-05-06 02:34:15,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337531836] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:15,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:15,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 02:34:15,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269737335] [2021-05-06 02:34:15,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 02:34:15,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:15,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 02:34:15,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:34:15,952 INFO L87 Difference]: Start difference. First operand 133 states and 173 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 02:34:16,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:16,417 INFO L93 Difference]: Finished difference Result 152 states and 200 transitions. [2021-05-06 02:34:16,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:34:16,417 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 89 [2021-05-06 02:34:16,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:16,418 INFO L225 Difference]: With dead ends: 152 [2021-05-06 02:34:16,419 INFO L226 Difference]: Without dead ends: 150 [2021-05-06 02:34:16,419 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 213.1ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-05-06 02:34:16,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-06 02:34:16,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 143. [2021-05-06 02:34:16,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 79 states have (on average 1.1518987341772151) internal successors, (91), 82 states have internal predecessors, (91), 49 states have call successors, (49), 15 states have call predecessors, (49), 14 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 02:34:16,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 187 transitions. [2021-05-06 02:34:16,441 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 187 transitions. Word has length 89 [2021-05-06 02:34:16,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:16,444 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 187 transitions. [2021-05-06 02:34:16,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 02:34:16,444 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 187 transitions. [2021-05-06 02:34:16,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 02:34:16,445 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:16,445 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:16,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 02:34:16,667 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:16,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:16,668 INFO L82 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 1 times [2021-05-06 02:34:16,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:16,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791880620] [2021-05-06 02:34:16,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:16,675 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:16,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343417202] [2021-05-06 02:34:16,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 02:34:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:16,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 02:34:16,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:17,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:17,014 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-05-06 02:34:17,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:17,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791880620] [2021-05-06 02:34:17,015 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:17,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343417202] [2021-05-06 02:34:17,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343417202] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:17,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:17,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:34:17,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231956140] [2021-05-06 02:34:17,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:34:17,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:17,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:34:17,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:34:17,016 INFO L87 Difference]: Start difference. First operand 143 states and 187 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:34:17,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:17,412 INFO L93 Difference]: Finished difference Result 169 states and 220 transitions. [2021-05-06 02:34:17,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:34:17,413 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 91 [2021-05-06 02:34:17,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:17,415 INFO L225 Difference]: With dead ends: 169 [2021-05-06 02:34:17,415 INFO L226 Difference]: Without dead ends: 166 [2021-05-06 02:34:17,416 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 194.8ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:34:17,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-06 02:34:17,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 156. [2021-05-06 02:34:17,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 90 states have internal predecessors, (100), 53 states have call successors, (53), 16 states have call predecessors, (53), 15 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-06 02:34:17,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 204 transitions. [2021-05-06 02:34:17,441 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 204 transitions. Word has length 91 [2021-05-06 02:34:17,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:17,441 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 204 transitions. [2021-05-06 02:34:17,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:34:17,441 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 204 transitions. [2021-05-06 02:34:17,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 02:34:17,443 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:17,443 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:17,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 02:34:17,657 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:17,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:17,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1307252997, now seen corresponding path program 1 times [2021-05-06 02:34:17,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:17,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697638325] [2021-05-06 02:34:17,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:17,663 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:17,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966023580] [2021-05-06 02:34:17,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 02:34:17,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:17,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:34:17,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:17,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-05-06 02:34:17,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:17,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697638325] [2021-05-06 02:34:17,857 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:17,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966023580] [2021-05-06 02:34:17,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966023580] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:17,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:17,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:34:17,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389061938] [2021-05-06 02:34:17,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:34:17,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:17,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:34:17,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:34:17,858 INFO L87 Difference]: Start difference. First operand 156 states and 204 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 02:34:18,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:18,024 INFO L93 Difference]: Finished difference Result 197 states and 271 transitions. [2021-05-06 02:34:18,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:34:18,024 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 92 [2021-05-06 02:34:18,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:18,026 INFO L225 Difference]: With dead ends: 197 [2021-05-06 02:34:18,026 INFO L226 Difference]: Without dead ends: 195 [2021-05-06 02:34:18,026 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:34:18,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-06 02:34:18,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 176. [2021-05-06 02:34:18,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 103 states have internal predecessors, (112), 62 states have call successors, (62), 17 states have call predecessors, (62), 16 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-06 02:34:18,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 234 transitions. [2021-05-06 02:34:18,052 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 234 transitions. Word has length 92 [2021-05-06 02:34:18,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:18,053 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 234 transitions. [2021-05-06 02:34:18,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 02:34:18,053 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 234 transitions. [2021-05-06 02:34:18,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 02:34:18,054 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:18,054 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:18,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:18,269 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:18,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:18,269 INFO L82 PathProgramCache]: Analyzing trace with hash 703654790, now seen corresponding path program 5 times [2021-05-06 02:34:18,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:18,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201480317] [2021-05-06 02:34:18,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:18,277 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:18,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607818796] [2021-05-06 02:34:18,277 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 [2021-05-06 02:34:18,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-06 02:34:18,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:18,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:34:18,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:18,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,508 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 02:34:18,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:18,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201480317] [2021-05-06 02:34:18,508 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:18,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607818796] [2021-05-06 02:34:18,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607818796] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:34:18,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:34:18,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:34:18,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018104387] [2021-05-06 02:34:18,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:34:18,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:18,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:34:18,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:34:18,510 INFO L87 Difference]: Start difference. First operand 176 states and 234 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 02:34:18,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:18,586 INFO L93 Difference]: Finished difference Result 222 states and 294 transitions. [2021-05-06 02:34:18,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:34:18,586 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 105 [2021-05-06 02:34:18,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:18,588 INFO L225 Difference]: With dead ends: 222 [2021-05-06 02:34:18,588 INFO L226 Difference]: Without dead ends: 160 [2021-05-06 02:34:18,589 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:34:18,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-06 02:34:18,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 150. [2021-05-06 02:34:18,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 89 states have internal predecessors, (92), 49 states have call successors, (49), 17 states have call predecessors, (49), 16 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 02:34:18,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 188 transitions. [2021-05-06 02:34:18,614 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 188 transitions. Word has length 105 [2021-05-06 02:34:18,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:18,614 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 188 transitions. [2021-05-06 02:34:18,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 02:34:18,614 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 188 transitions. [2021-05-06 02:34:18,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 02:34:18,615 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:18,615 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:18,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 02:34:18,829 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:18,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:18,829 INFO L82 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 2 times [2021-05-06 02:34:18,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:18,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989115277] [2021-05-06 02:34:18,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:18,836 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:18,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117431353] [2021-05-06 02:34:18,836 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 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 [2021-05-06 02:34:18,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:34:18,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:18,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-06 02:34:18,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:19,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 75 proven. 49 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-06 02:34:19,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:19,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989115277] [2021-05-06 02:34:19,340 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:19,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117431353] [2021-05-06 02:34:19,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117431353] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:19,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:19,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:34:19,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912579696] [2021-05-06 02:34:19,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:34:19,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:19,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:34:19,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:34:19,344 INFO L87 Difference]: Start difference. First operand 150 states and 188 transitions. Second operand has 13 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-06 02:34:19,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:19,785 INFO L93 Difference]: Finished difference Result 158 states and 195 transitions. [2021-05-06 02:34:19,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:34:19,785 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 107 [2021-05-06 02:34:19,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:19,786 INFO L225 Difference]: With dead ends: 158 [2021-05-06 02:34:19,786 INFO L226 Difference]: Without dead ends: 156 [2021-05-06 02:34:19,787 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 216.4ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:34:19,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-06 02:34:19,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2021-05-06 02:34:19,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 92 states have internal predecessors, (95), 49 states have call successors, (49), 18 states have call predecessors, (49), 17 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 02:34:19,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 191 transitions. [2021-05-06 02:34:19,822 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 191 transitions. Word has length 107 [2021-05-06 02:34:19,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:19,822 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 191 transitions. [2021-05-06 02:34:19,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-06 02:34:19,822 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 191 transitions. [2021-05-06 02:34:19,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 02:34:19,823 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:19,823 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:20,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 02:34:20,024 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:20,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:20,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1483033219, now seen corresponding path program 3 times [2021-05-06 02:34:20,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:20,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908391199] [2021-05-06 02:34:20,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:20,036 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:20,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279562680] [2021-05-06 02:34:20,037 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 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 [2021-05-06 02:34:20,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:34:20,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:20,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 02:34:20,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:20,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,259 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 61 proven. 10 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-05-06 02:34:20,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:20,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908391199] [2021-05-06 02:34:20,260 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:20,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279562680] [2021-05-06 02:34:20,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279562680] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:20,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:20,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:34:20,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792132536] [2021-05-06 02:34:20,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:34:20,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:20,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:34:20,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:34:20,261 INFO L87 Difference]: Start difference. First operand 154 states and 191 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 02:34:20,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:20,339 INFO L93 Difference]: Finished difference Result 160 states and 196 transitions. [2021-05-06 02:34:20,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:34:20,340 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 111 [2021-05-06 02:34:20,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:20,341 INFO L225 Difference]: With dead ends: 160 [2021-05-06 02:34:20,341 INFO L226 Difference]: Without dead ends: 158 [2021-05-06 02:34:20,342 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:34:20,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-06 02:34:20,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-05-06 02:34:20,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 95 states have internal predecessors, (98), 49 states have call successors, (49), 19 states have call predecessors, (49), 18 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 02:34:20,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 194 transitions. [2021-05-06 02:34:20,362 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 194 transitions. Word has length 111 [2021-05-06 02:34:20,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:20,362 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 194 transitions. [2021-05-06 02:34:20,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 02:34:20,362 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 194 transitions. [2021-05-06 02:34:20,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-06 02:34:20,363 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:20,364 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:20,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 02:34:20,579 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:20,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:20,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 2 times [2021-05-06 02:34:20,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:20,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714349605] [2021-05-06 02:34:20,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:20,586 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:20,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132334788] [2021-05-06 02:34:20,586 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 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 [2021-05-06 02:34:20,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:34:20,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:20,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-06 02:34:20,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:20,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 73 proven. 31 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-06 02:34:21,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:21,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714349605] [2021-05-06 02:34:21,077 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:21,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132334788] [2021-05-06 02:34:21,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132334788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:21,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:21,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 02:34:21,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407157564] [2021-05-06 02:34:21,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 02:34:21,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:21,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 02:34:21,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:34:21,092 INFO L87 Difference]: Start difference. First operand 158 states and 194 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 02:34:21,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:21,777 INFO L93 Difference]: Finished difference Result 192 states and 241 transitions. [2021-05-06 02:34:21,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:34:21,777 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 6 states have call successors, (19) Word has length 113 [2021-05-06 02:34:21,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:21,779 INFO L225 Difference]: With dead ends: 192 [2021-05-06 02:34:21,779 INFO L226 Difference]: Without dead ends: 189 [2021-05-06 02:34:21,779 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 333.4ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-06 02:34:21,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-06 02:34:21,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2021-05-06 02:34:21,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 105 states have (on average 1.0952380952380953) internal successors, (115), 110 states have internal predecessors, (115), 61 states have call successors, (61), 21 states have call predecessors, (61), 20 states have return successors, (59), 55 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 02:34:21,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 235 transitions. [2021-05-06 02:34:21,805 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 235 transitions. Word has length 113 [2021-05-06 02:34:21,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:21,805 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 235 transitions. [2021-05-06 02:34:21,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 02:34:21,805 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 235 transitions. [2021-05-06 02:34:21,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 02:34:21,807 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:21,807 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:22,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:22,021 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:22,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:22,021 INFO L82 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 3 times [2021-05-06 02:34:22,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:22,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75136538] [2021-05-06 02:34:22,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:22,027 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:22,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344484713] [2021-05-06 02:34:22,027 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 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 [2021-05-06 02:34:22,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:34:22,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:22,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:34:22,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:22,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,263 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-05-06 02:34:22,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:22,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75136538] [2021-05-06 02:34:22,263 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:22,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344484713] [2021-05-06 02:34:22,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344484713] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:22,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:22,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:34:22,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509884654] [2021-05-06 02:34:22,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:34:22,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:22,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:34:22,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:34:22,265 INFO L87 Difference]: Start difference. First operand 187 states and 235 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-05-06 02:34:22,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:22,511 INFO L93 Difference]: Finished difference Result 233 states and 311 transitions. [2021-05-06 02:34:22,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:34:22,512 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 116 [2021-05-06 02:34:22,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:22,513 INFO L225 Difference]: With dead ends: 233 [2021-05-06 02:34:22,513 INFO L226 Difference]: Without dead ends: 226 [2021-05-06 02:34:22,514 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:34:22,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-06 02:34:22,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 206. [2021-05-06 02:34:22,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 112 states have (on average 1.125) internal successors, (126), 113 states have internal predecessors, (126), 73 states have call successors, (73), 21 states have call predecessors, (73), 20 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-06 02:34:22,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 270 transitions. [2021-05-06 02:34:22,542 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 270 transitions. Word has length 116 [2021-05-06 02:34:22,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:22,543 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 270 transitions. [2021-05-06 02:34:22,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-05-06 02:34:22,543 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 270 transitions. [2021-05-06 02:34:22,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-06 02:34:22,544 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:22,544 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:22,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:22,753 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:22,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:22,753 INFO L82 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 3 times [2021-05-06 02:34:22,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:22,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919468115] [2021-05-06 02:34:22,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:22,759 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:22,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782390041] [2021-05-06 02:34:22,760 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 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 [2021-05-06 02:34:22,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:34:22,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:22,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-06 02:34:22,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:23,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 66 proven. 38 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-05-06 02:34:23,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:23,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919468115] [2021-05-06 02:34:23,258 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:23,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782390041] [2021-05-06 02:34:23,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782390041] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:23,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:23,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 02:34:23,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900434842] [2021-05-06 02:34:23,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 02:34:23,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:23,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 02:34:23,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:34:23,260 INFO L87 Difference]: Start difference. First operand 206 states and 270 transitions. Second operand has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 02:34:23,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:23,732 INFO L93 Difference]: Finished difference Result 245 states and 320 transitions. [2021-05-06 02:34:23,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:34:23,733 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 127 [2021-05-06 02:34:23,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:23,734 INFO L225 Difference]: With dead ends: 245 [2021-05-06 02:34:23,735 INFO L226 Difference]: Without dead ends: 243 [2021-05-06 02:34:23,735 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 300.5ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-05-06 02:34:23,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-06 02:34:23,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2021-05-06 02:34:23,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 130 states have (on average 1.123076923076923) internal successors, (146), 131 states have internal predecessors, (146), 85 states have call successors, (85), 24 states have call predecessors, (85), 23 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 02:34:23,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 314 transitions. [2021-05-06 02:34:23,765 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 314 transitions. Word has length 127 [2021-05-06 02:34:23,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:23,765 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 314 transitions. [2021-05-06 02:34:23,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 02:34:23,765 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 314 transitions. [2021-05-06 02:34:23,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-06 02:34:23,766 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:23,766 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:23,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 02:34:23,981 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:23,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:23,981 INFO L82 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 4 times [2021-05-06 02:34:23,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:23,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429952789] [2021-05-06 02:34:23,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:23,992 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:23,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120545186] [2021-05-06 02:34:23,992 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 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 [2021-05-06 02:34:24,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:34:24,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:24,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-06 02:34:24,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:24,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:24,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:24,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:24,561 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 89 proven. 108 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-05-06 02:34:24,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:24,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429952789] [2021-05-06 02:34:24,561 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:24,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120545186] [2021-05-06 02:34:24,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120545186] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:24,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:24,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:34:24,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135748646] [2021-05-06 02:34:24,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:34:24,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:24,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:34:24,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:34:24,562 INFO L87 Difference]: Start difference. First operand 239 states and 314 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-06 02:34:25,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:25,069 INFO L93 Difference]: Finished difference Result 248 states and 322 transitions. [2021-05-06 02:34:25,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:34:25,071 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 129 [2021-05-06 02:34:25,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:25,072 INFO L225 Difference]: With dead ends: 248 [2021-05-06 02:34:25,072 INFO L226 Difference]: Without dead ends: 246 [2021-05-06 02:34:25,073 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 115 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 288.3ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:34:25,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-06 02:34:25,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2021-05-06 02:34:25,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 133 states have (on average 1.1203007518796992) internal successors, (149), 134 states have internal predecessors, (149), 85 states have call successors, (85), 25 states have call predecessors, (85), 24 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 02:34:25,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 317 transitions. [2021-05-06 02:34:25,106 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 317 transitions. Word has length 129 [2021-05-06 02:34:25,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:25,106 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 317 transitions. [2021-05-06 02:34:25,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-06 02:34:25,107 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 317 transitions. [2021-05-06 02:34:25,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-06 02:34:25,108 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:25,108 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:25,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 02:34:25,332 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:25,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:25,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 5 times [2021-05-06 02:34:25,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:25,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118566939] [2021-05-06 02:34:25,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:25,341 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:25,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1441889498] [2021-05-06 02:34:25,341 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 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 [2021-05-06 02:34:25,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 02:34:25,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:25,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 74 conjunts are in the unsatisfiable core [2021-05-06 02:34:25,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:25,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,972 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 92 proven. 110 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-05-06 02:34:25,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:25,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118566939] [2021-05-06 02:34:25,972 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:25,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441889498] [2021-05-06 02:34:25,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441889498] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:25,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:25,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 02:34:25,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25378664] [2021-05-06 02:34:25,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 02:34:25,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:25,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 02:34:25,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:34:25,974 INFO L87 Difference]: Start difference. First operand 243 states and 317 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-06 02:34:26,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:26,606 INFO L93 Difference]: Finished difference Result 257 states and 329 transitions. [2021-05-06 02:34:26,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:34:26,607 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 132 [2021-05-06 02:34:26,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:26,609 INFO L225 Difference]: With dead ends: 257 [2021-05-06 02:34:26,609 INFO L226 Difference]: Without dead ends: 255 [2021-05-06 02:34:26,610 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 280.7ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:34:26,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-06 02:34:26,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 251. [2021-05-06 02:34:26,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 139 states have (on average 1.1151079136690647) internal successors, (155), 140 states have internal predecessors, (155), 85 states have call successors, (85), 27 states have call predecessors, (85), 26 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 02:34:26,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 323 transitions. [2021-05-06 02:34:26,647 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 323 transitions. Word has length 132 [2021-05-06 02:34:26,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:26,647 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 323 transitions. [2021-05-06 02:34:26,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-06 02:34:26,647 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 323 transitions. [2021-05-06 02:34:26,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-06 02:34:26,648 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:26,648 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:26,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:26,862 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:26,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:26,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 4 times [2021-05-06 02:34:26,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:26,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937359093] [2021-05-06 02:34:26,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:26,870 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:26,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126456652] [2021-05-06 02:34:26,870 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 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 [2021-05-06 02:34:26,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:34:26,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:26,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-06 02:34:26,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:27,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,627 WARN L205 SmtUtils]: Spent 1.49 m on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-05-06 02:35:56,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:56,823 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-06 02:35:56,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:59,325 WARN L205 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-05-06 02:35:59,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:59,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:59,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:59,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:59,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:59,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:59,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:59,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:59,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:59,638 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 121 proven. 93 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-05-06 02:35:59,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:59,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937359093] [2021-05-06 02:35:59,638 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:59,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126456652] [2021-05-06 02:35:59,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126456652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:35:59,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:35:59,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 02:35:59,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337882064] [2021-05-06 02:35:59,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 02:35:59,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:59,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 02:35:59,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:35:59,640 INFO L87 Difference]: Start difference. First operand 251 states and 323 transitions. Second operand has 17 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 11 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 10 states have call successors, (23) [2021-05-06 02:36:00,707 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-05-06 02:36:01,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:01,900 INFO L93 Difference]: Finished difference Result 296 states and 385 transitions. [2021-05-06 02:36:01,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:36:01,901 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 11 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 10 states have call successors, (23) Word has length 135 [2021-05-06 02:36:01,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:01,903 INFO L225 Difference]: With dead ends: 296 [2021-05-06 02:36:01,903 INFO L226 Difference]: Without dead ends: 293 [2021-05-06 02:36:01,903 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 92655.1ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-05-06 02:36:01,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-05-06 02:36:01,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 290. [2021-05-06 02:36:01,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 159 states have (on average 1.119496855345912) internal successors, (178), 160 states have internal predecessors, (178), 101 states have call successors, (101), 30 states have call predecessors, (101), 29 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2021-05-06 02:36:01,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 378 transitions. [2021-05-06 02:36:01,944 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 378 transitions. Word has length 135 [2021-05-06 02:36:01,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:01,944 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 378 transitions. [2021-05-06 02:36:01,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 11 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 10 states have call successors, (23) [2021-05-06 02:36:01,944 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 378 transitions. [2021-05-06 02:36:01,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-06 02:36:01,945 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:01,945 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:02,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 02:36:02,161 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:02,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:02,161 INFO L82 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 5 times [2021-05-06 02:36:02,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:02,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437378978] [2021-05-06 02:36:02,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:02,168 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:02,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896875162] [2021-05-06 02:36:02,169 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 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 [2021-05-06 02:36:02,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 02:36:02,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:02,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-06 02:36:02,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:02,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 38 proven. 52 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2021-05-06 02:36:02,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:02,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437378978] [2021-05-06 02:36:02,724 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:02,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896875162] [2021-05-06 02:36:02,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896875162] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:02,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:02,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 02:36:02,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699182545] [2021-05-06 02:36:02,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 02:36:02,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:02,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 02:36:02,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:36:02,725 INFO L87 Difference]: Start difference. First operand 290 states and 378 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2021-05-06 02:36:03,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:03,860 INFO L93 Difference]: Finished difference Result 340 states and 444 transitions. [2021-05-06 02:36:03,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 02:36:03,869 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 138 [2021-05-06 02:36:03,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:03,871 INFO L225 Difference]: With dead ends: 340 [2021-05-06 02:36:03,871 INFO L226 Difference]: Without dead ends: 337 [2021-05-06 02:36:03,871 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 284.4ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-05-06 02:36:03,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-05-06 02:36:03,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 304. [2021-05-06 02:36:03,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 167 states have (on average 1.1197604790419162) internal successors, (187), 168 states have internal predecessors, (187), 105 states have call successors, (105), 32 states have call predecessors, (105), 31 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2021-05-06 02:36:03,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 395 transitions. [2021-05-06 02:36:03,923 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 395 transitions. Word has length 138 [2021-05-06 02:36:03,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:03,923 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 395 transitions. [2021-05-06 02:36:03,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2021-05-06 02:36:03,923 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 395 transitions. [2021-05-06 02:36:03,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-06 02:36:03,924 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:03,925 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:04,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:04,141 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:04,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:04,141 INFO L82 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 6 times [2021-05-06 02:36:04,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:04,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684533397] [2021-05-06 02:36:04,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:04,150 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:04,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500688844] [2021-05-06 02:36:04,150 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:04,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 02:36:04,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:04,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-06 02:36:04,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:04,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,688 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-06 02:36:04,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:04,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,062 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-06 02:36:05,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:05,445 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-06 02:36:05,948 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-06 02:36:06,231 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-06 02:36:06,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,705 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-06 02:36:06,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:06,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,357 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-05-06 02:36:07,665 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-06 02:36:07,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:07,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:08,425 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 140 proven. 135 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2021-05-06 02:36:08,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:08,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684533397] [2021-05-06 02:36:08,425 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:08,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500688844] [2021-05-06 02:36:08,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500688844] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:08,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:08,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-06 02:36:08,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209927518] [2021-05-06 02:36:08,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 02:36:08,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:08,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 02:36:08,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-06 02:36:08,427 INFO L87 Difference]: Start difference. First operand 304 states and 395 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 11 states have call predecessors, (23), 9 states have call successors, (23) [2021-05-06 02:36:10,795 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-06 02:36:11,326 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-05-06 02:36:11,900 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-05-06 02:36:13,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:13,419 INFO L93 Difference]: Finished difference Result 397 states and 525 transitions. [2021-05-06 02:36:13,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 02:36:13,420 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 11 states have call predecessors, (23), 9 states have call successors, (23) Word has length 149 [2021-05-06 02:36:13,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:13,422 INFO L225 Difference]: With dead ends: 397 [2021-05-06 02:36:13,422 INFO L226 Difference]: Without dead ends: 395 [2021-05-06 02:36:13,422 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 4512.3ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-05-06 02:36:13,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-05-06 02:36:13,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 391. [2021-05-06 02:36:13,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 212 states have (on average 1.1273584905660377) internal successors, (239), 213 states have internal predecessors, (239), 141 states have call successors, (141), 38 states have call predecessors, (141), 37 states have return successors, (139), 139 states have call predecessors, (139), 139 states have call successors, (139) [2021-05-06 02:36:13,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 519 transitions. [2021-05-06 02:36:13,486 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 519 transitions. Word has length 149 [2021-05-06 02:36:13,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:13,486 INFO L480 AbstractCegarLoop]: Abstraction has 391 states and 519 transitions. [2021-05-06 02:36:13,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 11 states have call predecessors, (23), 9 states have call successors, (23) [2021-05-06 02:36:13,486 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 519 transitions. [2021-05-06 02:36:13,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-06 02:36:13,487 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:13,488 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:13,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 02:36:13,701 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:13,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:13,701 INFO L82 PathProgramCache]: Analyzing trace with hash -162755237, now seen corresponding path program 7 times [2021-05-06 02:36:13,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:13,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789793640] [2021-05-06 02:36:13,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:13,707 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:13,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [979390142] [2021-05-06 02:36:13,707 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:13,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:13,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-06 02:36:13,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:13,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:13,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:14,668 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 190 proven. 173 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-05-06 02:36:14,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:14,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789793640] [2021-05-06 02:36:14,669 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:14,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979390142] [2021-05-06 02:36:14,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979390142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:14,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:14,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 02:36:14,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733789217] [2021-05-06 02:36:14,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 02:36:14,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:14,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 02:36:14,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:36:14,670 INFO L87 Difference]: Start difference. First operand 391 states and 519 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) [2021-05-06 02:36:16,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:16,210 INFO L93 Difference]: Finished difference Result 411 states and 535 transitions. [2021-05-06 02:36:16,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 02:36:16,211 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) Word has length 151 [2021-05-06 02:36:16,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:16,213 INFO L225 Difference]: With dead ends: 411 [2021-05-06 02:36:16,213 INFO L226 Difference]: Without dead ends: 409 [2021-05-06 02:36:16,213 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 720.1ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-05-06 02:36:16,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-05-06 02:36:16,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 370. [2021-05-06 02:36:16,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 203 states have (on average 1.1231527093596059) internal successors, (228), 204 states have internal predecessors, (228), 129 states have call successors, (129), 38 states have call predecessors, (129), 37 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2021-05-06 02:36:16,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 484 transitions. [2021-05-06 02:36:16,271 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 484 transitions. Word has length 151 [2021-05-06 02:36:16,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:16,272 INFO L480 AbstractCegarLoop]: Abstraction has 370 states and 484 transitions. [2021-05-06 02:36:16,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) [2021-05-06 02:36:16,272 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 484 transitions. [2021-05-06 02:36:16,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-06 02:36:16,273 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:16,273 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:16,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 02:36:16,489 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:16,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:16,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1672449564, now seen corresponding path program 8 times [2021-05-06 02:36:16,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:16,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209424073] [2021-05-06 02:36:16,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:16,495 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:16,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736609180] [2021-05-06 02:36:16,495 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:16,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:36:16,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:16,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 87 conjunts are in the unsatisfiable core [2021-05-06 02:36:16,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:16,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:16,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:17,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:17,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:17,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:17,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:17,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:17,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:17,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:17,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:17,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:17,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:17,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:17,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:17,275 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-06 02:36:17,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:17,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:17,575 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-06 02:36:17,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:17,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:17,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:17,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,208 WARN L205 SmtUtils]: Spent 4.52 s on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-06 02:36:22,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:22,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:24,971 WARN L205 SmtUtils]: Spent 2.42 s on a formula simplification that was a NOOP. DAG size: 43 [2021-05-06 02:36:24,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:24,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:24,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:24,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:24,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:24,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:24,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:25,108 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 180 proven. 113 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-05-06 02:36:25,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:25,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209424073] [2021-05-06 02:36:25,108 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:25,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736609180] [2021-05-06 02:36:25,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736609180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:25,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:25,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 02:36:25,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398242984] [2021-05-06 02:36:25,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 02:36:25,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:25,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 02:36:25,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-05-06 02:36:25,110 INFO L87 Difference]: Start difference. First operand 370 states and 484 transitions. Second operand has 19 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 11 states have call successors, (28), 1 states have call predecessors, (28), 3 states have return successors, (26), 11 states have call predecessors, (26), 10 states have call successors, (26) [2021-05-06 02:36:28,037 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-05-06 02:36:28,349 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-05-06 02:36:30,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:30,023 INFO L93 Difference]: Finished difference Result 378 states and 493 transitions. [2021-05-06 02:36:30,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 02:36:30,024 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 11 states have call successors, (28), 1 states have call predecessors, (28), 3 states have return successors, (26), 11 states have call predecessors, (26), 10 states have call successors, (26) Word has length 154 [2021-05-06 02:36:30,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:30,024 INFO L225 Difference]: With dead ends: 378 [2021-05-06 02:36:30,024 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 02:36:30,025 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 8735.5ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-05-06 02:36:30,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 02:36:30,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 02:36:30,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 02:36:30,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 02:36:30,026 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 154 [2021-05-06 02:36:30,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:30,026 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 02:36:30,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 11 states have call successors, (28), 1 states have call predecessors, (28), 3 states have return successors, (26), 11 states have call predecessors, (26), 10 states have call successors, (26) [2021-05-06 02:36:30,026 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 02:36:30,026 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 02:36:30,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-06 02:36:30,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 02:36:30,490 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 204 [2021-05-06 02:36:30,818 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 298 [2021-05-06 02:36:31,002 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 204 [2021-05-06 02:36:31,284 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 298 [2021-05-06 02:36:31,578 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 298 [2021-05-06 02:36:38,264 WARN L205 SmtUtils]: Spent 6.40 s on a formula simplification. DAG size of input: 187 DAG size of output: 49 [2021-05-06 02:37:38,572 WARN L205 SmtUtils]: Spent 1.00 m on a formula simplification. DAG size of input: 281 DAG size of output: 53 [2021-05-06 02:37:38,830 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 31 [2021-05-06 02:37:44,932 WARN L205 SmtUtils]: Spent 6.10 s on a formula simplification. DAG size of input: 187 DAG size of output: 49 [2021-05-06 02:37:45,192 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 31 [2021-05-06 02:38:12,238 WARN L205 SmtUtils]: Spent 27.04 s on a formula simplification. DAG size of input: 281 DAG size of output: 53 [2021-05-06 02:38:13,110 WARN L205 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2021-05-06 02:39:31,962 WARN L205 SmtUtils]: Spent 1.31 m on a formula simplification. DAG size of input: 281 DAG size of output: 49 [2021-05-06 02:39:33,121 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 138 DAG size of output: 39 [2021-05-06 02:39:33,152 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-05-06 02:39:33,152 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-05-06 02:39:33,152 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-05-06 02:39:33,152 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:39:33,152 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 02:39:33,152 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:39:33,152 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:39:33,152 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 02:39:33,152 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 02:39:33,152 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:39:33,153 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-05-06 02:39:33,153 INFO L198 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-05-06 02:39:33,153 INFO L198 CegarLoopUtils]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-05-06 02:39:33,153 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-05-06 02:39:33,153 INFO L194 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 main_~x~0) (<= main_~x~0 50) (<= 0 main_~y~0) (<= main_~y~0 50)) [2021-05-06 02:39:33,153 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 18 74) no Hoare annotation was computed. [2021-05-06 02:39:33,153 INFO L194 CegarLoopUtils]: At program point L50(line 50) the Hoare annotation is: (let ((.cse2 (<= main_~x~0 50)) (.cse0 (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0))) (.cse1 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0)))) (.cse3 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse4 (<= main_~y~0 50))) (or (and .cse0 (<= 1 main_~x~0) .cse1 (< main_~b~0 main_~a~0) .cse2 .cse3 (<= 1 main_~y~0) .cse4) (and (= (* main_~y~0 main_~y~0) main_~yy~0) .cse2 (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~r~0 0) .cse0 (= main_~b~0 main_~y~0) .cse1 .cse3 (<= 0 main_~b~0) (not (= main_~b~0 0)) .cse4 (<= 1 main_~a~0) (= main_~p~0 1) (= main_~s~0 1)))) [2021-05-06 02:39:33,153 INFO L194 CegarLoopUtils]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse2 (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0))) (.cse3 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0)))) (.cse1 (<= main_~x~0 50)) (.cse6 (< main_~b~0 main_~a~0)) (.cse5 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse7 (<= 1 main_~y~0)) (.cse4 (<= main_~y~0 50))) (or (and (= (* main_~y~0 main_~y~0) main_~yy~0) .cse0 (= main_~a~0 main_~x~0) .cse1 (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~r~0 0) .cse2 (= main_~b~0 main_~y~0) .cse3 (<= 0 main_~b~0) (not (= main_~b~0 0)) .cse4 (= main_~p~0 1) (= main_~s~0 1)) (and .cse0 (= main_~k~0 0) .cse1 .cse5 .cse6 .cse7 (= main_~c~0 main_~a~0) .cse4) (and .cse0 .cse2 .cse3 .cse1 .cse6 .cse5 .cse7 .cse4))) [2021-05-06 02:39:33,153 INFO L194 CegarLoopUtils]: At program point L48-1(line 48) the Hoare annotation is: (let ((.cse1 (<= 1 main_~x~0)) (.cse5 (<= 1 main_~y~0)) (.cse3 (<= main_~x~0 50)) (.cse0 (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0))) (.cse2 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0)))) (.cse4 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse6 (<= main_~y~0 50))) (or (and .cse0 .cse1 .cse2 (< main_~b~0 main_~a~0) .cse3 .cse4 .cse5 .cse6) (and .cse1 .cse0 (= main_~k~0 0) .cse3 (< main_~b~0 main_~c~0) .cse4 .cse5 .cse6) (and (= (* main_~y~0 main_~y~0) main_~yy~0) .cse3 (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~r~0 0) .cse0 (= main_~b~0 main_~y~0) .cse2 .cse4 (<= 0 main_~b~0) (not (= main_~b~0 0)) .cse6 (<= 1 main_~a~0) (= main_~p~0 1) (= main_~s~0 1)))) [2021-05-06 02:39:33,153 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 18 74) no Hoare annotation was computed. [2021-05-06 02:39:33,153 INFO L198 CegarLoopUtils]: For program point L42(lines 42 43) no Hoare annotation was computed. [2021-05-06 02:39:33,153 INFO L194 CegarLoopUtils]: At program point L71(line 71) the Hoare annotation is: (and (<= 1 main_~x~0) (<= main_~x~0 50) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (<= 1 main_~y~0) (<= 0 main_~b~0) (<= main_~y~0 50)) [2021-05-06 02:39:33,153 INFO L194 CegarLoopUtils]: At program point L38(line 38) the Hoare annotation is: (and (= (* main_~y~0 main_~y~0) main_~yy~0) (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~r~0 0) (<= 1 main_~x~0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (<= main_~x~0 50) (<= 1 main_~b~0) (<= main_~y~0 50) (= main_~p~0 1) (= main_~s~0 1)) [2021-05-06 02:39:33,153 INFO L194 CegarLoopUtils]: At program point L38-1(line 38) the Hoare annotation is: (and (= (* main_~y~0 main_~y~0) main_~yy~0) (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~r~0 0) (<= 1 main_~x~0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (<= main_~x~0 50) (<= 1 main_~b~0) (<= main_~y~0 50) (= main_~p~0 1) (= main_~s~0 1)) [2021-05-06 02:39:33,153 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 18 74) the Hoare annotation is: true [2021-05-06 02:39:33,153 INFO L198 CegarLoopUtils]: For program point L26(line 26) no Hoare annotation was computed. [2021-05-06 02:39:33,154 INFO L194 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 50)) [2021-05-06 02:39:33,154 INFO L194 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 50) (<= 0 main_~y~0) (<= main_~y~0 50)) [2021-05-06 02:39:33,154 INFO L201 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: true [2021-05-06 02:39:33,154 INFO L198 CegarLoopUtils]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-05-06 02:39:33,154 INFO L198 CegarLoopUtils]: For program point L51(lines 47 56) no Hoare annotation was computed. [2021-05-06 02:39:33,154 INFO L194 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: (let ((.cse1 (<= 1 main_~x~0)) (.cse5 (<= 1 main_~y~0)) (.cse3 (<= main_~x~0 50)) (.cse0 (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0))) (.cse2 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0)))) (.cse4 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse6 (<= main_~y~0 50))) (or (and .cse0 .cse1 .cse2 (< main_~b~0 main_~a~0) .cse3 .cse4 .cse5 .cse6) (and .cse1 .cse0 (= main_~k~0 0) .cse3 (< main_~b~0 main_~c~0) .cse4 .cse5 .cse6) (and (= (* main_~y~0 main_~y~0) main_~yy~0) .cse3 (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~r~0 0) .cse0 (= main_~b~0 main_~y~0) .cse2 .cse4 (<= 0 main_~b~0) (not (= main_~b~0 0)) .cse6 (<= 1 main_~a~0) (= main_~p~0 1) (= main_~s~0 1)))) [2021-05-06 02:39:33,154 INFO L194 CegarLoopUtils]: At program point L47-2(lines 47 56) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse2 (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0))) (.cse3 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0)))) (.cse1 (<= main_~x~0 50)) (.cse6 (< main_~b~0 main_~a~0)) (.cse5 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse7 (<= 1 main_~y~0)) (.cse4 (<= main_~y~0 50))) (or (and (= (* main_~y~0 main_~y~0) main_~yy~0) .cse0 (= main_~a~0 main_~x~0) .cse1 (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~r~0 0) .cse2 (= main_~b~0 main_~y~0) .cse3 (<= 0 main_~b~0) (not (= main_~b~0 0)) .cse4 (= main_~p~0 1) (= main_~s~0 1)) (and .cse0 (= main_~k~0 0) .cse1 .cse5 .cse6 .cse7 (= main_~c~0 main_~a~0) .cse4) (and .cse0 .cse2 .cse3 .cse1 .cse6 .cse5 .cse7 .cse4))) [2021-05-06 02:39:33,154 INFO L198 CegarLoopUtils]: For program point L47-3(lines 47 56) no Hoare annotation was computed. [2021-05-06 02:39:33,154 INFO L194 CegarLoopUtils]: At program point L41-1(lines 39 68) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= main_~x~0 50)) (.cse2 (<= main_~y~0 50))) (or (and .cse0 .cse1 (< main_~b~0 main_~a~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (<= 1 main_~y~0) .cse2) (and (= (* main_~y~0 main_~y~0) main_~yy~0) (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~r~0 0) .cse0 (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) .cse1 (<= 1 main_~b~0) .cse2 (= main_~p~0 1) (= main_~s~0 1)))) [2021-05-06 02:39:33,154 INFO L198 CegarLoopUtils]: For program point L72(line 72) no Hoare annotation was computed. [2021-05-06 02:39:33,154 INFO L194 CegarLoopUtils]: At program point L41-2(lines 41 68) the Hoare annotation is: (let ((.cse0 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse1 (<= 1 main_~y~0)) (.cse2 (<= main_~y~0 50))) (or (and (<= 1 main_~x~0) (<= main_~x~0 50) (< main_~b~0 main_~a~0) .cse0 (<= main_~b~0 50) .cse1 (<= 0 main_~b~0) .cse2) (and (= main_~x~0 (+ main_~y~0 main_~b~0)) (= main_~y~0 main_~x~0) .cse0 .cse1 (= main_~q~0 1) .cse2 (= (+ main_~s~0 1) 0)))) [2021-05-06 02:39:33,154 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-05-06 02:39:33,154 INFO L198 CegarLoopUtils]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-05-06 02:39:33,154 INFO L198 CegarLoopUtils]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-05-06 02:39:33,155 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-05-06 02:39:33,155 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-05-06 02:39:33,155 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-05-06 02:39:33,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 02:39:33 BoogieIcfgContainer [2021-05-06 02:39:33,170 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 02:39:33,170 INFO L168 Benchmark]: Toolchain (without parser) took 326916.10 ms. Allocated memory was 192.9 MB in the beginning and 470.8 MB in the end (delta: 277.9 MB). Free memory was 157.6 MB in the beginning and 397.2 MB in the end (delta: -239.5 MB). Peak memory consumption was 267.9 MB. Max. memory is 8.0 GB. [2021-05-06 02:39:33,170 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 192.9 MB. Free memory is still 174.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 02:39:33,170 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.91 ms. Allocated memory is still 192.9 MB. Free memory was 157.4 MB in the beginning and 175.5 MB in the end (delta: -18.1 MB). Peak memory consumption was 11.2 MB. Max. memory is 8.0 GB. [2021-05-06 02:39:33,170 INFO L168 Benchmark]: Boogie Preprocessor took 48.19 ms. Allocated memory is still 192.9 MB. Free memory was 175.5 MB in the beginning and 173.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 02:39:33,170 INFO L168 Benchmark]: RCFGBuilder took 390.59 ms. Allocated memory is still 192.9 MB. Free memory was 173.9 MB in the beginning and 156.1 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-06 02:39:33,170 INFO L168 Benchmark]: TraceAbstraction took 326176.93 ms. Allocated memory was 192.9 MB in the beginning and 470.8 MB in the end (delta: 277.9 MB). Free memory was 155.6 MB in the beginning and 397.2 MB in the end (delta: -241.6 MB). Peak memory consumption was 266.1 MB. Max. memory is 8.0 GB. [2021-05-06 02:39:33,171 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 192.9 MB. Free memory is still 174.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 295.91 ms. Allocated memory is still 192.9 MB. Free memory was 157.4 MB in the beginning and 175.5 MB in the end (delta: -18.1 MB). Peak memory consumption was 11.2 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.19 ms. Allocated memory is still 192.9 MB. Free memory was 175.5 MB in the beginning and 173.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 390.59 ms. Allocated memory is still 192.9 MB. Free memory was 173.9 MB in the beginning and 156.1 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 326176.93 ms. Allocated memory was 192.9 MB in the beginning and 470.8 MB in the end (delta: 277.9 MB). Free memory was 155.6 MB in the beginning and 397.2 MB in the end (delta: -241.6 MB). Peak memory consumption was 266.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 143194.6ms, OverallIterations: 28, TraceHistogramMax: 20, EmptinessCheckTime: 36.5ms, AutomataDifference: 21389.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 182924.4ms, InitialAbstractionConstructionTime: 9.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1327 SDtfs, 747 SDslu, 7847 SDs, 0 SdLazy, 8741 SolverSat, 836 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15607.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2752 GetRequests, 2370 SyntacticMatches, 16 SemanticMatches, 366 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 109844.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=391occurred in iteration=26, InterpolantAutomatonStates: 303, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 761.7ms AutomataMinimizationTime, 28 MinimizatonAttempts, 214 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 20 LocationsWithAnnotation, 189 PreInvPairs, 360 NumberOfFragments, 976 HoareAnnotationTreeSize, 189 FomulaSimplifications, 369874 FormulaSimplificationTreeSizeReduction, 1495.8ms HoareSimplificationTime, 20 FomulaSimplificationsInter, 80792 FormulaSimplificationTreeSizeReductionInter, 181403.5ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 283.1ms SsaConstructionTime, 1219.0ms SatisfiabilityAnalysisTime, 112461.6ms InterpolantComputationTime, 2682 NumberOfCodeBlocks, 2404 NumberOfCodeBlocksAsserted, 61 NumberOfCheckSat, 2654 ConstructedInterpolants, 7 QuantifiedInterpolants, 16408 SizeOfPredicates, 198 NumberOfNonLiveVariables, 6865 ConjunctsInSsa, 989 ConjunctsInUnsatCore, 28 InterpolantComputations, 2 PerfectInterpolantSequences, 7575/8659 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: ((((((((((((((y * y == yy && 1 <= x) && a == x) && x <= 50) && x * y == xy) && r == 0) && a == k * b + c) && b == y) && b == y * s + x * q) && 0 <= b) && !(b == 0)) && y <= 50) && p == 1) && s == 1) || (((((((1 <= x && k == 0) && x <= 50) && a == y * r + x * p) && b < a) && 1 <= y) && c == a) && y <= 50)) || (((((((1 <= x && a == k * b + c) && b == y * s + x * q) && x <= 50) && b < a) && a == y * r + x * p) && 1 <= y) && y <= 50) - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: (((((1 <= x && x <= 50) && b < a) && a == y * r + x * p) && 1 <= y) && y <= 50) || (((((((((((y * y == yy && x * y == xy) && r == 0) && 1 <= x) && b == y) && a == x) && b == y * s + x * q) && x <= 50) && 1 <= b) && y <= 50) && p == 1) && s == 1) RESULT: Ultimate proved your program to be correct! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...