/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:17:43,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:17:43,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:17:43,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:17:43,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:17:43,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:17:43,348 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:17:43,353 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:17:43,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:17:43,358 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:17:43,359 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:17:43,360 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:17:43,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:17:43,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:17:43,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:17:43,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:17:43,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:17:43,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:17:43,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:17:43,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:17:43,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:17:43,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:17:43,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:17:43,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:17:43,393 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:17:43,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:17:43,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:17:43,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:17:43,400 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:17:43,414 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:17:43,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:17:43,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:17:43,417 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:17:43,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:17:43,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:17:43,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:17:43,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:17:43,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:17:43,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:17:43,418 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:17:43,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:17:43,418 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:17:43,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:17:43,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:17:43,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:17:43,419 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:17:43,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:17:43,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:17:43,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:17:43,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:17:43,420 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:17:43,420 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:17:43,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:17:43,685 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:17:43,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:17:43,687 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:17:43,687 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:17:43,688 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound2.c [2021-05-06 08:17:43,736 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1253c7ec/431f37e50fd64c69a53406fa533957ee/FLAG610e7df02 [2021-05-06 08:17:44,077 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:17:44,078 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound2.c [2021-05-06 08:17:44,083 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1253c7ec/431f37e50fd64c69a53406fa533957ee/FLAG610e7df02 [2021-05-06 08:17:44,092 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1253c7ec/431f37e50fd64c69a53406fa533957ee [2021-05-06 08:17:44,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:17:44,095 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:17:44,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:17:44,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:17:44,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:17:44,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:17:44" (1/1) ... [2021-05-06 08:17:44,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@457af914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:17:44, skipping insertion in model container [2021-05-06 08:17:44,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:17:44" (1/1) ... [2021-05-06 08:17:44,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:17:44,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:17:44,195 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_valuebound2.c[490,503] [2021-05-06 08:17:44,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:17:44,213 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:17:44,258 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_valuebound2.c[490,503] [2021-05-06 08:17:44,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:17:44,274 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:17:44,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:17:44 WrapperNode [2021-05-06 08:17:44,275 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:17:44,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:17:44,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:17:44,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:17:44,282 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:17:44" (1/1) ... [2021-05-06 08:17:44,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:17:44" (1/1) ... [2021-05-06 08:17:44,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:17:44" (1/1) ... [2021-05-06 08:17:44,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:17:44" (1/1) ... [2021-05-06 08:17:44,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:17:44" (1/1) ... [2021-05-06 08:17:44,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:17:44" (1/1) ... [2021-05-06 08:17:44,297 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:17:44" (1/1) ... [2021-05-06 08:17:44,298 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:17:44,299 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:17:44,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:17:44,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:17:44,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:17:44" (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 08:17:44,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:17:44,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:17:44,368 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:17:44,368 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:17:44,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:17:44,369 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:17:44,369 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:17:44,369 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:17:44,369 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:17:44,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:17:44,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:17:44,370 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:17:44,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:17:44,370 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:17:44,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:17:44,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:17:44,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:17:44,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:17:44,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:17:44,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:17:44,649 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:17:44,649 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 08:17:44,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:17:44 BoogieIcfgContainer [2021-05-06 08:17:44,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:17:44,651 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:17:44,651 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:17:44,651 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:17:44,653 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:17:44" (1/1) ... [2021-05-06 08:17:44,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:17:44 BasicIcfg [2021-05-06 08:17:44,668 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:17:44,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:17:44,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:17:44,671 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:17:44,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:17:44" (1/4) ... [2021-05-06 08:17:44,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ee8a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:17:44, skipping insertion in model container [2021-05-06 08:17:44,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:17:44" (2/4) ... [2021-05-06 08:17:44,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ee8a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:17:44, skipping insertion in model container [2021-05-06 08:17:44,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:17:44" (3/4) ... [2021-05-06 08:17:44,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ee8a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:17:44, skipping insertion in model container [2021-05-06 08:17:44,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:17:44" (4/4) ... [2021-05-06 08:17:44,675 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound2.cJordan [2021-05-06 08:17:44,679 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:17:44,682 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:17:44,694 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:17:44,715 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:17:44,715 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:17:44,715 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:17:44,715 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:17:44,715 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:17:44,715 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:17:44,715 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:17:44,715 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:17:44,727 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 08:17:44,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 08:17:44,735 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:44,736 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 08:17:44,736 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:44,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:44,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1630657446, now seen corresponding path program 1 times [2021-05-06 08:17:44,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:44,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878578489] [2021-05-06 08:17:44,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:44,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:17:44,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:44,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:17:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:44,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:17:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:44,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:17:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:44,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 08:17:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:44,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-06 08:17:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:44,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-06 08:17:44,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:44,972 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 08:17:44,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:44,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878578489] [2021-05-06 08:17:44,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878578489] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:17:44,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:17:44,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:17:44,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811162387] [2021-05-06 08:17:44,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:17:44,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:44,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:17:44,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:17:44,986 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 08:17:45,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:45,100 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-05-06 08:17:45,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:17:45,101 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 08:17:45,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:45,106 INFO L225 Difference]: With dead ends: 40 [2021-05-06 08:17:45,106 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 08:17:45,107 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:17:45,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 08:17:45,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 08:17:45,126 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 08:17:45,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-06 08:17:45,128 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2021-05-06 08:17:45,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:45,128 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-06 08:17:45,129 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 08:17:45,129 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-06 08:17:45,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 08:17:45,130 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:45,130 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 08:17:45,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:17:45,130 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:45,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:45,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1790145708, now seen corresponding path program 1 times [2021-05-06 08:17:45,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:45,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397367256] [2021-05-06 08:17:45,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:45,144 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:45,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307555630] [2021-05-06 08:17:45,144 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 08:17:45,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:45,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:17:45,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:45,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:45,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:45,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:45,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:45,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:45,375 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 08:17:45,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:45,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397367256] [2021-05-06 08:17:45,376 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:45,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307555630] [2021-05-06 08:17:45,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307555630] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:45,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:45,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:17:45,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332659078] [2021-05-06 08:17:45,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:17:45,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:45,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:17:45,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:17:45,378 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 08:17:45,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:45,463 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-05-06 08:17:45,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:17:45,464 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 08:17:45,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:45,465 INFO L225 Difference]: With dead ends: 44 [2021-05-06 08:17:45,465 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 08:17:45,466 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:17:45,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 08:17:45,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 08:17:45,471 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 08:17:45,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-06 08:17:45,472 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2021-05-06 08:17:45,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:45,484 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-06 08:17:45,485 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 08:17:45,485 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-06 08:17:45,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 08:17:45,486 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:45,486 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 08:17:45,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:17:45,703 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:45,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:45,704 INFO L82 PathProgramCache]: Analyzing trace with hash 375385207, now seen corresponding path program 1 times [2021-05-06 08:17:45,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:45,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354814896] [2021-05-06 08:17:45,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:45,714 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:45,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441431468] [2021-05-06 08:17:45,714 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 08:17:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:45,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:17:45,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:45,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:45,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:45,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:45,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:45,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:45,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:45,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:45,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:45,936 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 08:17:45,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:45,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354814896] [2021-05-06 08:17:45,937 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:45,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441431468] [2021-05-06 08:17:45,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441431468] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:45,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:45,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:17:45,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456691355] [2021-05-06 08:17:45,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:17:45,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:45,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:17:45,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:17:45,945 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 08:17:46,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:46,102 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-05-06 08:17:46,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:17:46,103 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 08:17:46,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:46,104 INFO L225 Difference]: With dead ends: 55 [2021-05-06 08:17:46,104 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 08:17:46,104 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:17:46,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 08:17:46,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2021-05-06 08:17:46,109 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 08:17:46,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-05-06 08:17:46,110 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2021-05-06 08:17:46,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:46,111 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-05-06 08:17:46,111 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 08:17:46,111 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-05-06 08:17:46,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 08:17:46,112 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:46,112 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 08:17:46,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:46,331 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:46,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:46,331 INFO L82 PathProgramCache]: Analyzing trace with hash -788787523, now seen corresponding path program 1 times [2021-05-06 08:17:46,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:46,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120861567] [2021-05-06 08:17:46,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:46,346 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:46,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768399183] [2021-05-06 08:17:46,346 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 08:17:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:46,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:17:46,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:46,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-06 08:17:46,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:46,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120861567] [2021-05-06 08:17:46,669 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:46,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768399183] [2021-05-06 08:17:46,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768399183] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:46,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:46,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:17:46,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944111067] [2021-05-06 08:17:46,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:17:46,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:46,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:17:46,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:17:46,674 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-06 08:17:46,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:46,788 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2021-05-06 08:17:46,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:17:46,788 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 50 [2021-05-06 08:17:46,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:46,790 INFO L225 Difference]: With dead ends: 54 [2021-05-06 08:17:46,790 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 08:17:46,791 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:17:46,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 08:17:46,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-06 08:17:46,795 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 08:17:46,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-05-06 08:17:46,796 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 50 [2021-05-06 08:17:46,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:46,796 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-05-06 08:17:46,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-06 08:17:46,796 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-05-06 08:17:46,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 08:17:46,797 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:46,797 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 08:17:47,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:47,009 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:47,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:47,009 INFO L82 PathProgramCache]: Analyzing trace with hash -735644649, now seen corresponding path program 1 times [2021-05-06 08:17:47,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:47,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695496719] [2021-05-06 08:17:47,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:47,019 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:47,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349753517] [2021-05-06 08:17:47,019 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 08:17:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:47,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:17:47,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:47,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 08:17:47,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:47,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695496719] [2021-05-06 08:17:47,247 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:47,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349753517] [2021-05-06 08:17:47,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349753517] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:47,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:47,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:17:47,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689857841] [2021-05-06 08:17:47,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:17:47,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:47,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:17:47,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:17:47,248 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:17:47,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:47,347 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2021-05-06 08:17:47,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:17:47,348 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2021-05-06 08:17:47,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:47,351 INFO L225 Difference]: With dead ends: 58 [2021-05-06 08:17:47,351 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 08:17:47,352 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:17:47,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 08:17:47,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-06 08:17:47,366 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 08:17:47,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-05-06 08:17:47,367 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 55 [2021-05-06 08:17:47,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:47,367 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-05-06 08:17:47,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:17:47,367 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-05-06 08:17:47,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 08:17:47,368 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:47,368 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 08:17:47,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:47,568 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:47,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:47,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1700404515, now seen corresponding path program 1 times [2021-05-06 08:17:47,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:47,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520501426] [2021-05-06 08:17:47,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:47,579 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:47,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [976811301] [2021-05-06 08:17:47,579 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 08:17:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:47,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:17:47,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:47,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,756 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 08:17:47,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:47,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520501426] [2021-05-06 08:17:47,757 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:47,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976811301] [2021-05-06 08:17:47,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976811301] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:47,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:47,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:17:47,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102127028] [2021-05-06 08:17:47,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:17:47,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:47,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:17:47,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:17:47,759 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 08:17:47,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:47,861 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2021-05-06 08:17:47,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:17:47,861 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 08:17:47,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:47,862 INFO L225 Difference]: With dead ends: 62 [2021-05-06 08:17:47,862 INFO L226 Difference]: Without dead ends: 62 [2021-05-06 08:17:47,862 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:17:47,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-06 08:17:47,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-06 08:17:47,869 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 08:17:47,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2021-05-06 08:17:47,871 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 60 [2021-05-06 08:17:47,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:47,871 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2021-05-06 08:17:47,871 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 08:17:47,871 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2021-05-06 08:17:47,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-06 08:17:47,874 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:47,874 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 08:17:48,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:17:48,075 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:48,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:48,075 INFO L82 PathProgramCache]: Analyzing trace with hash 14033329, now seen corresponding path program 1 times [2021-05-06 08:17:48,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:48,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631339013] [2021-05-06 08:17:48,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:48,092 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:48,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1686681733] [2021-05-06 08:17:48,092 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 08:17:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:48,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:17:48,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:48,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 08:17:48,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:48,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631339013] [2021-05-06 08:17:48,270 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:48,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686681733] [2021-05-06 08:17:48,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686681733] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:48,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:48,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:17:48,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691561641] [2021-05-06 08:17:48,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:17:48,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:48,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:17:48,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:17:48,273 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 08:17:48,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:48,337 INFO L93 Difference]: Finished difference Result 89 states and 120 transitions. [2021-05-06 08:17:48,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:17:48,337 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2021-05-06 08:17:48,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:48,338 INFO L225 Difference]: With dead ends: 89 [2021-05-06 08:17:48,339 INFO L226 Difference]: Without dead ends: 89 [2021-05-06 08:17:48,339 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:17:48,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-06 08:17:48,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2021-05-06 08:17:48,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 45 states have internal predecessors, (48), 28 states have call successors, (28), 9 states have call predecessors, (28), 8 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 08:17:48,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-06 08:17:48,344 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 67 [2021-05-06 08:17:48,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:48,344 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-06 08:17:48,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 08:17:48,344 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-06 08:17:48,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:17:48,345 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:48,345 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 08:17:48,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:48,551 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:48,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:48,551 INFO L82 PathProgramCache]: Analyzing trace with hash 2004479621, now seen corresponding path program 1 times [2021-05-06 08:17:48,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:48,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661815911] [2021-05-06 08:17:48,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:48,567 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:48,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207949344] [2021-05-06 08:17:48,568 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 08:17:48,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:48,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:17:48,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:48,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,844 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 08:17:48,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:48,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661815911] [2021-05-06 08:17:48,844 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:48,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207949344] [2021-05-06 08:17:48,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207949344] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:48,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:48,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:17:48,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350737668] [2021-05-06 08:17:48,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:17:48,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:48,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:17:48,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:17:48,846 INFO L87 Difference]: Start difference. First operand 79 states and 102 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 08:17:48,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:48,997 INFO L93 Difference]: Finished difference Result 116 states and 163 transitions. [2021-05-06 08:17:48,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:17:48,997 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 08:17:48,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:49,000 INFO L225 Difference]: With dead ends: 116 [2021-05-06 08:17:49,001 INFO L226 Difference]: Without dead ends: 116 [2021-05-06 08:17:49,001 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:17:49,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-06 08:17:49,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2021-05-06 08:17:49,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 59 states have internal predecessors, (65), 41 states have call successors, (41), 9 states have call predecessors, (41), 8 states have return successors, (39), 36 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-06 08:17:49,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 145 transitions. [2021-05-06 08:17:49,019 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 145 transitions. Word has length 69 [2021-05-06 08:17:49,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:49,020 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 145 transitions. [2021-05-06 08:17:49,020 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 08:17:49,020 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 145 transitions. [2021-05-06 08:17:49,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 08:17:49,021 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:49,021 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 08:17:49,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:49,234 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:49,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:49,235 INFO L82 PathProgramCache]: Analyzing trace with hash -966489810, now seen corresponding path program 1 times [2021-05-06 08:17:49,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:49,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92055369] [2021-05-06 08:17:49,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:49,248 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:49,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586856181] [2021-05-06 08:17:49,248 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 08:17:49,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:49,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 08:17:49,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:49,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,443 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 08:17:49,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:49,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92055369] [2021-05-06 08:17:49,444 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:49,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586856181] [2021-05-06 08:17:49,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586856181] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:49,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:49,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:17:49,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066358007] [2021-05-06 08:17:49,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:17:49,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:49,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:17:49,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:17:49,448 INFO L87 Difference]: Start difference. First operand 105 states and 145 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, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:17:49,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:49,588 INFO L93 Difference]: Finished difference Result 148 states and 211 transitions. [2021-05-06 08:17:49,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:17:49,589 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, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-05-06 08:17:49,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:49,590 INFO L225 Difference]: With dead ends: 148 [2021-05-06 08:17:49,590 INFO L226 Difference]: Without dead ends: 147 [2021-05-06 08:17:49,590 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:17:49,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-06 08:17:49,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2021-05-06 08:17:49,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 81 states have internal predecessors, (89), 60 states have call successors, (60), 10 states have call predecessors, (60), 9 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-06 08:17:49,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 206 transitions. [2021-05-06 08:17:49,597 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 206 transitions. Word has length 75 [2021-05-06 08:17:49,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:49,597 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 206 transitions. [2021-05-06 08:17:49,597 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, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:17:49,597 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 206 transitions. [2021-05-06 08:17:49,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 08:17:49,598 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:49,598 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 08:17:49,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 08:17:49,813 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:49,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:49,814 INFO L82 PathProgramCache]: Analyzing trace with hash -271689658, now seen corresponding path program 2 times [2021-05-06 08:17:49,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:49,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155887481] [2021-05-06 08:17:49,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:49,828 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:49,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732577620] [2021-05-06 08:17:49,828 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 08:17:49,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:17:49,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:49,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 08:17:49,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:49,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,223 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-06 08:17:50,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:50,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155887481] [2021-05-06 08:17:50,224 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:50,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732577620] [2021-05-06 08:17:50,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732577620] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:50,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:50,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:17:50,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97687213] [2021-05-06 08:17:50,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:17:50,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:50,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:17:50,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:17:50,225 INFO L87 Difference]: Start difference. First operand 144 states and 206 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 08:17:50,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:50,481 INFO L93 Difference]: Finished difference Result 150 states and 211 transitions. [2021-05-06 08:17:50,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:17:50,482 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 80 [2021-05-06 08:17:50,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:50,483 INFO L225 Difference]: With dead ends: 150 [2021-05-06 08:17:50,483 INFO L226 Difference]: Without dead ends: 150 [2021-05-06 08:17:50,484 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 215.0ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:17:50,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-06 08:17:50,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2021-05-06 08:17:50,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 84 states have internal predecessors, (92), 60 states have call successors, (60), 11 states have call predecessors, (60), 10 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-06 08:17:50,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 209 transitions. [2021-05-06 08:17:50,490 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 209 transitions. Word has length 80 [2021-05-06 08:17:50,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:50,490 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 209 transitions. [2021-05-06 08:17:50,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 08:17:50,491 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 209 transitions. [2021-05-06 08:17:50,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 08:17:50,491 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:50,491 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 08:17:50,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:50,692 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:50,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:50,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1540307954, now seen corresponding path program 3 times [2021-05-06 08:17:50,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:50,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034170492] [2021-05-06 08:17:50,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:50,700 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:50,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217178613] [2021-05-06 08:17:50,700 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 08:17:50,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:17:50,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:50,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-06 08:17:50,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:50,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-05-06 08:17:51,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:51,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034170492] [2021-05-06 08:17:51,113 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:51,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217178613] [2021-05-06 08:17:51,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217178613] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:51,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:51,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:17:51,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790378897] [2021-05-06 08:17:51,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:17:51,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:51,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:17:51,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:17:51,115 INFO L87 Difference]: Start difference. First operand 148 states and 209 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:17:51,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:51,421 INFO L93 Difference]: Finished difference Result 154 states and 214 transitions. [2021-05-06 08:17:51,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:17:51,421 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 85 [2021-05-06 08:17:51,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:51,422 INFO L225 Difference]: With dead ends: 154 [2021-05-06 08:17:51,422 INFO L226 Difference]: Without dead ends: 154 [2021-05-06 08:17:51,422 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 216.8ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:17:51,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-06 08:17:51,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2021-05-06 08:17:51,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 80 states have (on average 1.1875) internal successors, (95), 87 states have internal predecessors, (95), 60 states have call successors, (60), 12 states have call predecessors, (60), 11 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-06 08:17:51,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 212 transitions. [2021-05-06 08:17:51,434 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 212 transitions. Word has length 85 [2021-05-06 08:17:51,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:51,435 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 212 transitions. [2021-05-06 08:17:51,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:17:51,435 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 212 transitions. [2021-05-06 08:17:51,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 08:17:51,436 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:51,436 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 08:17:51,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:51,652 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:51,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:51,653 INFO L82 PathProgramCache]: Analyzing trace with hash 583225195, now seen corresponding path program 2 times [2021-05-06 08:17:51,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:51,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176368091] [2021-05-06 08:17:51,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:51,661 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:51,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018496209] [2021-05-06 08:17:51,661 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 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 08:17:51,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:17:51,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:51,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:17:51,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:51,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-05-06 08:17:51,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:51,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176368091] [2021-05-06 08:17:51,938 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:51,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018496209] [2021-05-06 08:17:51,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018496209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:51,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:51,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:17:51,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128879634] [2021-05-06 08:17:51,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:17:51,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:51,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:17:51,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:17:51,939 INFO L87 Difference]: Start difference. First operand 152 states and 212 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:17:52,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:52,210 INFO L93 Difference]: Finished difference Result 211 states and 303 transitions. [2021-05-06 08:17:52,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:17:52,211 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 89 [2021-05-06 08:17:52,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:52,212 INFO L225 Difference]: With dead ends: 211 [2021-05-06 08:17:52,212 INFO L226 Difference]: Without dead ends: 211 [2021-05-06 08:17:52,212 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 138.1ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:17:52,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-06 08:17:52,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 203. [2021-05-06 08:17:52,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 104 states have (on average 1.2019230769230769) internal successors, (125), 111 states have internal predecessors, (125), 85 states have call successors, (85), 14 states have call predecessors, (85), 13 states have return successors, (82), 77 states have call predecessors, (82), 82 states have call successors, (82) [2021-05-06 08:17:52,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 292 transitions. [2021-05-06 08:17:52,218 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 292 transitions. Word has length 89 [2021-05-06 08:17:52,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:52,219 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 292 transitions. [2021-05-06 08:17:52,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:17:52,219 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 292 transitions. [2021-05-06 08:17:52,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 08:17:52,219 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:52,219 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 08:17:52,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 08:17:52,433 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:52,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:52,433 INFO L82 PathProgramCache]: Analyzing trace with hash -757951041, now seen corresponding path program 1 times [2021-05-06 08:17:52,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:52,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776759382] [2021-05-06 08:17:52,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:52,439 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:52,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929954512] [2021-05-06 08:17:52,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:17:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:52,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 08:17:52,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:52,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:52,677 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 08:17:52,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:52,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776759382] [2021-05-06 08:17:52,678 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:52,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929954512] [2021-05-06 08:17:52,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929954512] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:52,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:52,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:17:52,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717030695] [2021-05-06 08:17:52,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:17:52,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:52,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:17:52,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:17:52,679 INFO L87 Difference]: Start difference. First operand 203 states and 292 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 08:17:52,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:52,965 INFO L93 Difference]: Finished difference Result 213 states and 300 transitions. [2021-05-06 08:17:52,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:17:52,966 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 08:17:52,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:52,967 INFO L225 Difference]: With dead ends: 213 [2021-05-06 08:17:52,967 INFO L226 Difference]: Without dead ends: 212 [2021-05-06 08:17:52,967 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:17:52,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-06 08:17:52,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2021-05-06 08:17:52,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 110 states have (on average 1.1818181818181819) internal successors, (130), 117 states have internal predecessors, (130), 85 states have call successors, (85), 16 states have call predecessors, (85), 15 states have return successors, (82), 77 states have call predecessors, (82), 82 states have call successors, (82) [2021-05-06 08:17:52,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 297 transitions. [2021-05-06 08:17:52,973 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 297 transitions. Word has length 91 [2021-05-06 08:17:52,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:52,973 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 297 transitions. [2021-05-06 08:17:52,973 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 08:17:52,973 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 297 transitions. [2021-05-06 08:17:52,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 08:17:52,974 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:52,974 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 3, 3, 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] [2021-05-06 08:17:53,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:17:53,189 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:53,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:53,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1735983139, now seen corresponding path program 4 times [2021-05-06 08:17:53,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:53,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770701268] [2021-05-06 08:17:53,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:53,195 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:53,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455319503] [2021-05-06 08:17:53,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:53,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:17:53,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:53,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:17:53,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:53,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,356 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-05-06 08:17:53,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:53,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770701268] [2021-05-06 08:17:53,357 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:53,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455319503] [2021-05-06 08:17:53,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455319503] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:17:53,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:17:53,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:17:53,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593033984] [2021-05-06 08:17:53,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:17:53,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:53,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:17:53,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:17:53,358 INFO L87 Difference]: Start difference. First operand 211 states and 297 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, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-05-06 08:17:53,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:53,405 INFO L93 Difference]: Finished difference Result 194 states and 263 transitions. [2021-05-06 08:17:53,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:17:53,406 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, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 100 [2021-05-06 08:17:53,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:53,407 INFO L225 Difference]: With dead ends: 194 [2021-05-06 08:17:53,407 INFO L226 Difference]: Without dead ends: 194 [2021-05-06 08:17:53,408 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:17:53,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-06 08:17:53,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 185. [2021-05-06 08:17:53,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 97 states have (on average 1.1134020618556701) internal successors, (108), 103 states have internal predecessors, (108), 72 states have call successors, (72), 16 states have call predecessors, (72), 15 states have return successors, (69), 65 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-06 08:17:53,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 249 transitions. [2021-05-06 08:17:53,415 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 249 transitions. Word has length 100 [2021-05-06 08:17:53,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:53,417 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 249 transitions. [2021-05-06 08:17:53,417 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, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-05-06 08:17:53,417 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 249 transitions. [2021-05-06 08:17:53,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 08:17:53,418 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:53,418 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 08:17:53,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:17:53,636 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:53,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:53,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1708635976, now seen corresponding path program 1 times [2021-05-06 08:17:53,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:53,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105539197] [2021-05-06 08:17:53,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:53,643 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:53,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2018997665] [2021-05-06 08:17:53,643 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 08:17:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:53,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:17:53,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:53,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 122 proven. 23 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-05-06 08:17:53,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:53,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105539197] [2021-05-06 08:17:53,866 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:53,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018997665] [2021-05-06 08:17:53,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018997665] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:53,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:53,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:17:53,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382027723] [2021-05-06 08:17:53,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:17:53,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:53,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:17:53,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:17:53,868 INFO L87 Difference]: Start difference. First operand 185 states and 249 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-05-06 08:17:54,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:54,052 INFO L93 Difference]: Finished difference Result 167 states and 221 transitions. [2021-05-06 08:17:54,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:17:54,052 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 107 [2021-05-06 08:17:54,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:54,054 INFO L225 Difference]: With dead ends: 167 [2021-05-06 08:17:54,054 INFO L226 Difference]: Without dead ends: 164 [2021-05-06 08:17:54,056 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:17:54,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-06 08:17:54,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-05-06 08:17:54,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 86 states have (on average 1.1046511627906976) internal successors, (95), 91 states have internal predecessors, (95), 63 states have call successors, (63), 15 states have call predecessors, (63), 14 states have return successors, (60), 57 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-06 08:17:54,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 218 transitions. [2021-05-06 08:17:54,061 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 218 transitions. Word has length 107 [2021-05-06 08:17:54,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:54,061 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 218 transitions. [2021-05-06 08:17:54,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-05-06 08:17:54,061 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 218 transitions. [2021-05-06 08:17:54,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-06 08:17:54,062 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:54,063 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 08:17:54,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:54,281 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:54,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:54,281 INFO L82 PathProgramCache]: Analyzing trace with hash -966740615, now seen corresponding path program 2 times [2021-05-06 08:17:54,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:54,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753727663] [2021-05-06 08:17:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:54,290 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:54,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037746496] [2021-05-06 08:17:54,291 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 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 08:17:54,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:17:54,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:54,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-06 08:17:54,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:54,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 47 proven. 45 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-05-06 08:17:54,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:54,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753727663] [2021-05-06 08:17:54,748 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:54,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037746496] [2021-05-06 08:17:54,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037746496] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:54,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:54,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:17:54,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941762965] [2021-05-06 08:17:54,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:17:54,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:54,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:17:54,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:17:54,750 INFO L87 Difference]: Start difference. First operand 164 states and 218 transitions. Second operand has 17 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2021-05-06 08:17:55,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:55,237 INFO L93 Difference]: Finished difference Result 128 states and 156 transitions. [2021-05-06 08:17:55,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:17:55,238 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 113 [2021-05-06 08:17:55,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:55,238 INFO L225 Difference]: With dead ends: 128 [2021-05-06 08:17:55,238 INFO L226 Difference]: Without dead ends: 100 [2021-05-06 08:17:55,239 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 308.1ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:17:55,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-06 08:17:55,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-05-06 08:17:55,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 59 states have internal predecessors, (60), 32 states have call successors, (32), 12 states have call predecessors, (32), 11 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-06 08:17:55,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 122 transitions. [2021-05-06 08:17:55,242 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 122 transitions. Word has length 113 [2021-05-06 08:17:55,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:55,242 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 122 transitions. [2021-05-06 08:17:55,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2021-05-06 08:17:55,242 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 122 transitions. [2021-05-06 08:17:55,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-06 08:17:55,242 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:55,243 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 4, 4, 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] [2021-05-06 08:17:55,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:17:55,453 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:55,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:55,453 INFO L82 PathProgramCache]: Analyzing trace with hash 559736794, now seen corresponding path program 2 times [2021-05-06 08:17:55,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:55,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780100623] [2021-05-06 08:17:55,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:55,459 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:55,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1139080014] [2021-05-06 08:17:55,459 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 08:17:55,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:17:55,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:55,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 08:17:55,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:55,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:55,784 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 30 proven. 44 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-05-06 08:17:55,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:55,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780100623] [2021-05-06 08:17:55,785 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:55,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139080014] [2021-05-06 08:17:55,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139080014] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:55,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:55,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:17:55,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305535942] [2021-05-06 08:17:55,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:17:55,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:55,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:17:55,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:17:55,786 INFO L87 Difference]: Start difference. First operand 100 states and 122 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2021-05-06 08:17:56,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:56,214 INFO L93 Difference]: Finished difference Result 121 states and 150 transitions. [2021-05-06 08:17:56,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:17:56,214 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 114 [2021-05-06 08:17:56,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:56,215 INFO L225 Difference]: With dead ends: 121 [2021-05-06 08:17:56,215 INFO L226 Difference]: Without dead ends: 121 [2021-05-06 08:17:56,216 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 253.8ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-05-06 08:17:56,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-06 08:17:56,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2021-05-06 08:17:56,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 64 states have (on average 1.078125) internal successors, (69), 67 states have internal predecessors, (69), 36 states have call successors, (36), 14 states have call predecessors, (36), 13 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-06 08:17:56,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 139 transitions. [2021-05-06 08:17:56,219 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 139 transitions. Word has length 114 [2021-05-06 08:17:56,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:56,219 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 139 transitions. [2021-05-06 08:17:56,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2021-05-06 08:17:56,219 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 139 transitions. [2021-05-06 08:17:56,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 08:17:56,220 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:56,220 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 08:17:56,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:17:56,436 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:56,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:56,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1855467922, now seen corresponding path program 3 times [2021-05-06 08:17:56,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:56,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697366523] [2021-05-06 08:17:56,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:56,442 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:56,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [173863540] [2021-05-06 08:17:56,442 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 08:17:56,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:17:56,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:56,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:17:56,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:56,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,648 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 08:17:56,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:56,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697366523] [2021-05-06 08:17:56,648 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:56,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173863540] [2021-05-06 08:17:56,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173863540] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:56,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:56,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:17:56,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177115060] [2021-05-06 08:17:56,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:17:56,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:56,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:17:56,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:17:56,650 INFO L87 Difference]: Start difference. First operand 114 states and 139 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 08:17:56,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:56,858 INFO L93 Difference]: Finished difference Result 140 states and 183 transitions. [2021-05-06 08:17:56,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:17:56,859 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 08:17:56,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:56,859 INFO L225 Difference]: With dead ends: 140 [2021-05-06 08:17:56,859 INFO L226 Difference]: Without dead ends: 140 [2021-05-06 08:17:56,860 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:17:56,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-06 08:17:56,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 121. [2021-05-06 08:17:56,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 68 states have (on average 1.088235294117647) internal successors, (74), 70 states have internal predecessors, (74), 39 states have call successors, (39), 14 states have call predecessors, (39), 13 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 08:17:56,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 150 transitions. [2021-05-06 08:17:56,864 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 150 transitions. Word has length 116 [2021-05-06 08:17:56,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:56,864 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 150 transitions. [2021-05-06 08:17:56,864 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 08:17:56,864 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 150 transitions. [2021-05-06 08:17:56,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 08:17:56,864 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:56,864 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 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] [2021-05-06 08:17:57,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:17:57,081 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:57,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:57,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1380247977, now seen corresponding path program 3 times [2021-05-06 08:17:57,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:57,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170180412] [2021-05-06 08:17:57,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:57,093 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:57,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [646320796] [2021-05-06 08:17:57,093 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 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 08:17:57,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:17:57,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:57,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-06 08:17:57,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:57,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,426 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 58 proven. 38 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2021-05-06 08:17:57,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:57,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170180412] [2021-05-06 08:17:57,426 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:57,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646320796] [2021-05-06 08:17:57,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646320796] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:57,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:57,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:17:57,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034894334] [2021-05-06 08:17:57,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:17:57,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:57,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:17:57,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:17:57,427 INFO L87 Difference]: Start difference. First operand 121 states and 150 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2021-05-06 08:17:57,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:57,776 INFO L93 Difference]: Finished difference Result 153 states and 197 transitions. [2021-05-06 08:17:57,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:17:57,776 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) Word has length 122 [2021-05-06 08:17:57,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:57,777 INFO L225 Difference]: With dead ends: 153 [2021-05-06 08:17:57,777 INFO L226 Difference]: Without dead ends: 152 [2021-05-06 08:17:57,777 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 173.5ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:17:57,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-06 08:17:57,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2021-05-06 08:17:57,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 83 states have (on average 1.108433734939759) internal successors, (92), 86 states have internal predecessors, (92), 52 states have call successors, (52), 15 states have call predecessors, (52), 14 states have return successors, (49), 48 states have call predecessors, (49), 49 states have call successors, (49) [2021-05-06 08:17:57,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 193 transitions. [2021-05-06 08:17:57,781 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 193 transitions. Word has length 122 [2021-05-06 08:17:57,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:57,781 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 193 transitions. [2021-05-06 08:17:57,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2021-05-06 08:17:57,781 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 193 transitions. [2021-05-06 08:17:57,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-06 08:17:57,782 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:57,782 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 08:17:58,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:58,001 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:58,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:58,001 INFO L82 PathProgramCache]: Analyzing trace with hash 259955901, now seen corresponding path program 4 times [2021-05-06 08:17:58,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:58,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858337308] [2021-05-06 08:17:58,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:58,010 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:58,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326229384] [2021-05-06 08:17:58,010 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 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 08:17:58,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:17:58,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:58,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 08:17:58,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:58,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 154 proven. 18 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2021-05-06 08:17:58,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:58,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858337308] [2021-05-06 08:17:58,269 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:58,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326229384] [2021-05-06 08:17:58,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326229384] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:58,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:58,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:17:58,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375151695] [2021-05-06 08:17:58,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:17:58,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:58,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:17:58,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:17:58,271 INFO L87 Difference]: Start difference. First operand 150 states and 193 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 6 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:17:58,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:58,457 INFO L93 Difference]: Finished difference Result 144 states and 184 transitions. [2021-05-06 08:17:58,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:17:58,457 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 6 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 127 [2021-05-06 08:17:58,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:58,458 INFO L225 Difference]: With dead ends: 144 [2021-05-06 08:17:58,458 INFO L226 Difference]: Without dead ends: 144 [2021-05-06 08:17:58,458 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:17:58,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-06 08:17:58,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-05-06 08:17:58,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 77 states have (on average 1.077922077922078) internal successors, (83), 80 states have internal predecessors, (83), 52 states have call successors, (52), 15 states have call predecessors, (52), 14 states have return successors, (49), 48 states have call predecessors, (49), 49 states have call successors, (49) [2021-05-06 08:17:58,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 184 transitions. [2021-05-06 08:17:58,463 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 184 transitions. Word has length 127 [2021-05-06 08:17:58,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:58,463 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 184 transitions. [2021-05-06 08:17:58,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 6 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:17:58,463 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 184 transitions. [2021-05-06 08:17:58,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-05-06 08:17:58,464 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:58,464 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 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 08:17:58,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:58,673 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:58,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:58,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1186783020, now seen corresponding path program 5 times [2021-05-06 08:17:58,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:58,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093405918] [2021-05-06 08:17:58,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:58,678 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:58,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1625996161] [2021-05-06 08:17:58,678 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 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 08:17:58,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-06 08:17:58,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:58,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:17:58,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:58,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 64 proven. 38 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-05-06 08:17:59,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:59,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093405918] [2021-05-06 08:17:59,008 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:59,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625996161] [2021-05-06 08:17:59,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625996161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:59,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:59,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:17:59,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571724356] [2021-05-06 08:17:59,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:17:59,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:59,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:17:59,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:17:59,009 INFO L87 Difference]: Start difference. First operand 144 states and 184 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-06 08:17:59,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:59,235 INFO L93 Difference]: Finished difference Result 143 states and 181 transitions. [2021-05-06 08:17:59,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:17:59,236 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 136 [2021-05-06 08:17:59,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:59,236 INFO L225 Difference]: With dead ends: 143 [2021-05-06 08:17:59,236 INFO L226 Difference]: Without dead ends: 143 [2021-05-06 08:17:59,237 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 133.6ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:17:59,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-06 08:17:59,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2021-05-06 08:17:59,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 78 states have internal predecessors, (81), 51 states have call successors, (51), 15 states have call predecessors, (51), 14 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2021-05-06 08:17:59,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 180 transitions. [2021-05-06 08:17:59,240 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 180 transitions. Word has length 136 [2021-05-06 08:17:59,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:59,241 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 180 transitions. [2021-05-06 08:17:59,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-06 08:17:59,241 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 180 transitions. [2021-05-06 08:17:59,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-06 08:17:59,241 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:59,241 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 08:17:59,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 08:17:59,461 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:59,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:59,461 INFO L82 PathProgramCache]: Analyzing trace with hash -928796440, now seen corresponding path program 4 times [2021-05-06 08:17:59,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:59,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836043682] [2021-05-06 08:17:59,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:59,467 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:59,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [119784752] [2021-05-06 08:17:59,467 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 08:17:59,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:17:59,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:59,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-06 08:17:59,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:59,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,328 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 145 proven. 89 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2021-05-06 08:18:00,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:00,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836043682] [2021-05-06 08:18:00,329 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:00,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119784752] [2021-05-06 08:18:00,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119784752] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:00,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:00,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-06 08:18:00,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150725202] [2021-05-06 08:18:00,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 08:18:00,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:00,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 08:18:00,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:18:00,330 INFO L87 Difference]: Start difference. First operand 142 states and 180 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-06 08:18:00,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:00,870 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2021-05-06 08:18:00,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:18:00,870 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) Word has length 138 [2021-05-06 08:18:00,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:00,871 INFO L225 Difference]: With dead ends: 91 [2021-05-06 08:18:00,871 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 08:18:00,871 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 660.2ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-05-06 08:18:00,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 08:18:00,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 08:18:00,871 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 08:18:00,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 08:18:00,871 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 138 [2021-05-06 08:18:00,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:00,871 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 08:18:00,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-06 08:18:00,872 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 08:18:00,872 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 08:18:01,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 08:18:01,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:18:01 BasicIcfg [2021-05-06 08:18:01,084 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:18:01,085 INFO L168 Benchmark]: Toolchain (without parser) took 16989.43 ms. Allocated memory was 200.3 MB in the beginning and 398.5 MB in the end (delta: 198.2 MB). Free memory was 165.6 MB in the beginning and 337.7 MB in the end (delta: -172.1 MB). Peak memory consumption was 27.4 MB. Max. memory is 8.0 GB. [2021-05-06 08:18:01,085 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 200.3 MB. Free memory is still 182.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:18:01,085 INFO L168 Benchmark]: CACSL2BoogieTranslator took 176.91 ms. Allocated memory is still 200.3 MB. Free memory was 165.4 MB in the beginning and 182.4 MB in the end (delta: -17.0 MB). Peak memory consumption was 12.9 MB. Max. memory is 8.0 GB. [2021-05-06 08:18:01,085 INFO L168 Benchmark]: Boogie Preprocessor took 22.84 ms. Allocated memory is still 200.3 MB. Free memory was 182.4 MB in the beginning and 181.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:18:01,085 INFO L168 Benchmark]: RCFGBuilder took 351.63 ms. Allocated memory is still 200.3 MB. Free memory was 181.0 MB in the beginning and 164.2 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:18:01,085 INFO L168 Benchmark]: IcfgTransformer took 16.89 ms. Allocated memory is still 200.3 MB. Free memory was 164.2 MB in the beginning and 163.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:18:01,085 INFO L168 Benchmark]: TraceAbstraction took 16415.42 ms. Allocated memory was 200.3 MB in the beginning and 398.5 MB in the end (delta: 198.2 MB). Free memory was 162.5 MB in the beginning and 337.7 MB in the end (delta: -175.2 MB). Peak memory consumption was 24.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:18:01,085 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 200.3 MB. Free memory is still 182.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 176.91 ms. Allocated memory is still 200.3 MB. Free memory was 165.4 MB in the beginning and 182.4 MB in the end (delta: -17.0 MB). Peak memory consumption was 12.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 22.84 ms. Allocated memory is still 200.3 MB. Free memory was 182.4 MB in the beginning and 181.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 351.63 ms. Allocated memory is still 200.3 MB. Free memory was 181.0 MB in the beginning and 164.2 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 16.89 ms. Allocated memory is still 200.3 MB. Free memory was 164.2 MB in the beginning and 163.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 16415.42 ms. Allocated memory was 200.3 MB in the beginning and 398.5 MB in the end (delta: 198.2 MB). Free memory was 162.5 MB in the beginning and 337.7 MB in the end (delta: -175.2 MB). Peak memory consumption was 24.0 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 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 16368.3ms, OverallIterations: 22, TraceHistogramMax: 17, EmptinessCheckTime: 28.8ms, AutomataDifference: 4876.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1067 SDtfs, 660 SDslu, 5360 SDs, 0 SdLazy, 4486 SolverSat, 820 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2760.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1988 GetRequests, 1697 SyntacticMatches, 5 SemanticMatches, 286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 2967.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=211occurred in iteration=13, InterpolantAutomatonStates: 235, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 147.3ms AutomataMinimizationTime, 22 MinimizatonAttempts, 97 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 190.0ms SsaConstructionTime, 586.9ms SatisfiabilityAnalysisTime, 5195.3ms InterpolantComputationTime, 1926 NumberOfCodeBlocks, 1768 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 1904 ConstructedInterpolants, 0 QuantifiedInterpolants, 8464 SizeOfPredicates, 126 NumberOfNonLiveVariables, 5155 ConjunctsInSsa, 558 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 4738/5218 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...