/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/sqrt1-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:53:05,340 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:53:05,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:53:05,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:53:05,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:53:05,378 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:53:05,380 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:53:05,384 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:53:05,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:53:05,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:53:05,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:53:05,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:53:05,392 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:53:05,394 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:53:05,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:53:05,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:53:05,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:53:05,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:53:05,402 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:53:05,408 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:53:05,409 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:53:05,410 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:53:05,410 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:53:05,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:53:05,417 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:53:05,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:53:05,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:53:05,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:53:05,426 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:53:05,441 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:53:05,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:53:05,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:53:05,443 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:53:05,443 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:53:05,443 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:53:05,444 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:53:05,444 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:53:05,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:53:05,444 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:53:05,444 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:53:05,445 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:53:05,445 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:53:05,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:53:05,445 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:53:05,445 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:53:05,445 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:53:05,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:53:05,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:53:05,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:53:05,446 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:53:05,447 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:53:05,447 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:53:05,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:53:05,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:53:05,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:53:05,722 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:53:05,722 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:53:05,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound10.c [2021-05-06 10:53:05,769 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec589373a/3efd2d6f0c8f40b4a62a05f6a2847cf6/FLAGdd5281f8a [2021-05-06 10:53:06,142 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:53:06,142 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound10.c [2021-05-06 10:53:06,147 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec589373a/3efd2d6f0c8f40b4a62a05f6a2847cf6/FLAGdd5281f8a [2021-05-06 10:53:06,162 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec589373a/3efd2d6f0c8f40b4a62a05f6a2847cf6 [2021-05-06 10:53:06,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:53:06,167 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:53:06,168 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:53:06,168 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:53:06,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:53:06,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:53:06" (1/1) ... [2021-05-06 10:53:06,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eb956b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:06, skipping insertion in model container [2021-05-06 10:53:06,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:53:06" (1/1) ... [2021-05-06 10:53:06,176 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:53:06,187 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:53:06,304 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/sqrt1-ll_unwindbound10.c[520,533] [2021-05-06 10:53:06,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:53:06,324 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:53:06,335 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/sqrt1-ll_unwindbound10.c[520,533] [2021-05-06 10:53:06,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:53:06,375 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:53:06,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:06 WrapperNode [2021-05-06 10:53:06,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:53:06,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:53:06,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:53:06,377 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:53:06,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:06" (1/1) ... [2021-05-06 10:53:06,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:06" (1/1) ... [2021-05-06 10:53:06,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:06" (1/1) ... [2021-05-06 10:53:06,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:06" (1/1) ... [2021-05-06 10:53:06,411 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:06" (1/1) ... [2021-05-06 10:53:06,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:06" (1/1) ... [2021-05-06 10:53:06,415 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:06" (1/1) ... [2021-05-06 10:53:06,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:53:06,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:53:06,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:53:06,417 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:53:06,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:53:06,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:53:06,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:53:06,485 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:53:06,485 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:53:06,485 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:53:06,485 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:53:06,485 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:53:06,485 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:53:06,485 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:53:06,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:53:06,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 10:53:06,486 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:53:06,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:53:06,486 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:53:06,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:53:06,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:53:06,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:53:06,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:53:06,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:53:06,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:53:06,690 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:53:06,690 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:53:06,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:53:06 BoogieIcfgContainer [2021-05-06 10:53:06,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:53:06,701 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:53:06,701 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:53:06,702 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:53:06,704 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:53:06" (1/1) ... [2021-05-06 10:53:06,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:53:06 BasicIcfg [2021-05-06 10:53:06,716 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:53:06,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:53:06,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:53:06,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:53:06,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:53:06" (1/4) ... [2021-05-06 10:53:06,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51fd8745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:53:06, skipping insertion in model container [2021-05-06 10:53:06,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:06" (2/4) ... [2021-05-06 10:53:06,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51fd8745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:53:06, skipping insertion in model container [2021-05-06 10:53:06,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:53:06" (3/4) ... [2021-05-06 10:53:06,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51fd8745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:53:06, skipping insertion in model container [2021-05-06 10:53:06,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:53:06" (4/4) ... [2021-05-06 10:53:06,725 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound10.cJordan [2021-05-06 10:53:06,728 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:53:06,731 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:53:06,746 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:53:06,767 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:53:06,767 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:53:06,767 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:53:06,767 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:53:06,767 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:53:06,767 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:53:06,767 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:53:06,767 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:53:06,782 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:53:06,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 10:53:06,787 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:06,788 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:06,789 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:06,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:06,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1238828824, now seen corresponding path program 1 times [2021-05-06 10:53:06,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:06,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597511517] [2021-05-06 10:53:06,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:06,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:06,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:53:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:07,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:53:07,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:07,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597511517] [2021-05-06 10:53:07,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597511517] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:53:07,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:53:07,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:53:07,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841265850] [2021-05-06 10:53:07,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:53:07,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:07,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:53:07,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:53:07,035 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:53:07,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:07,114 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2021-05-06 10:53:07,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:53:07,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 10:53:07,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:07,119 INFO L225 Difference]: With dead ends: 27 [2021-05-06 10:53:07,120 INFO L226 Difference]: Without dead ends: 22 [2021-05-06 10:53:07,121 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:53:07,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-06 10:53:07,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-06 10:53:07,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:53:07,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-05-06 10:53:07,148 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2021-05-06 10:53:07,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:07,148 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-05-06 10:53:07,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:53:07,149 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-05-06 10:53:07,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 10:53:07,149 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:07,149 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:07,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:53:07,150 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:07,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:07,151 INFO L82 PathProgramCache]: Analyzing trace with hash -221581531, now seen corresponding path program 1 times [2021-05-06 10:53:07,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:07,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595493980] [2021-05-06 10:53:07,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:07,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:07,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:53:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:07,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:53:07,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:07,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595493980] [2021-05-06 10:53:07,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595493980] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:53:07,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:53:07,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 10:53:07,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46848827] [2021-05-06 10:53:07,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:53:07,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:07,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:53:07,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:53:07,282 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:53:07,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:07,361 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-05-06 10:53:07,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:53:07,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 10:53:07,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:07,362 INFO L225 Difference]: With dead ends: 23 [2021-05-06 10:53:07,362 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 10:53:07,363 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:07,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 10:53:07,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 10:53:07,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:53:07,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-05-06 10:53:07,366 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2021-05-06 10:53:07,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:07,367 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-05-06 10:53:07,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:53:07,367 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-05-06 10:53:07,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 10:53:07,367 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:07,367 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:07,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 10:53:07,368 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:07,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:07,368 INFO L82 PathProgramCache]: Analyzing trace with hash -220509055, now seen corresponding path program 1 times [2021-05-06 10:53:07,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:07,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786354759] [2021-05-06 10:53:07,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:07,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:53:07,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:53:07,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:07,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786354759] [2021-05-06 10:53:07,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786354759] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:53:07,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:53:07,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 10:53:07,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746680039] [2021-05-06 10:53:07,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:53:07,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:07,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:53:07,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:07,454 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:53:07,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:07,682 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2021-05-06 10:53:07,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:53:07,683 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 10:53:07,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:07,684 INFO L225 Difference]: With dead ends: 34 [2021-05-06 10:53:07,684 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 10:53:07,684 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:53:07,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 10:53:07,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-06 10:53:07,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:53:07,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 10:53:07,689 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2021-05-06 10:53:07,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:07,690 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 10:53:07,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:53:07,690 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 10:53:07,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:53:07,690 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:07,690 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:07,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 10:53:07,691 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:07,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:07,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1748396925, now seen corresponding path program 1 times [2021-05-06 10:53:07,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:07,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718981084] [2021-05-06 10:53:07,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:07,699 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:07,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44199296] [2021-05-06 10:53:07,699 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 10:53:07,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:07,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:53:07,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:07,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:53:07,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:07,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718981084] [2021-05-06 10:53:07,888 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:07,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44199296] [2021-05-06 10:53:07,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44199296] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:53:07,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:53:07,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:53:07,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780491395] [2021-05-06 10:53:07,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:53:07,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:07,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:53:07,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:53:07,890 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:53:07,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:07,960 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 10:53:07,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:53:07,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-05-06 10:53:07,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:07,961 INFO L225 Difference]: With dead ends: 38 [2021-05-06 10:53:07,961 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 10:53:07,961 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:07,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 10:53:07,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-06 10:53:07,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 10:53:07,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-05-06 10:53:07,965 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 17 [2021-05-06 10:53:07,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:07,965 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-05-06 10:53:07,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:53:07,966 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-05-06 10:53:07,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 10:53:07,966 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:07,966 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:08,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:08,185 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:08,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:08,186 INFO L82 PathProgramCache]: Analyzing trace with hash -214718627, now seen corresponding path program 1 times [2021-05-06 10:53:08,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:08,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422715446] [2021-05-06 10:53:08,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:08,192 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:08,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866726668] [2021-05-06 10:53:08,192 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 10:53:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:08,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:53:08,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:08,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:53:08,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:08,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422715446] [2021-05-06 10:53:08,348 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:08,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866726668] [2021-05-06 10:53:08,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866726668] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:53:08,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:53:08,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:53:08,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020871484] [2021-05-06 10:53:08,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:53:08,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:08,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:53:08,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:53:08,349 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:53:08,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:08,387 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-06 10:53:08,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:53:08,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 10:53:08,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:08,390 INFO L225 Difference]: With dead ends: 42 [2021-05-06 10:53:08,390 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 10:53:08,391 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:08,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 10:53:08,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-06 10:53:08,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:53:08,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-05-06 10:53:08,399 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2021-05-06 10:53:08,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:08,399 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-05-06 10:53:08,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:53:08,400 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-05-06 10:53:08,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 10:53:08,400 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:08,400 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:08,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:08,601 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:08,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:08,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1697115236, now seen corresponding path program 1 times [2021-05-06 10:53:08,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:08,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669227850] [2021-05-06 10:53:08,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:08,616 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:08,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102575350] [2021-05-06 10:53:08,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:53:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:08,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:53:08,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:08,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:08,744 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 10:53:08,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:08,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669227850] [2021-05-06 10:53:08,744 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:08,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102575350] [2021-05-06 10:53:08,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102575350] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:08,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:08,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 10:53:08,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893693486] [2021-05-06 10:53:08,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:53:08,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:08,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:53:08,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:53:08,746 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:53:08,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:08,771 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-05-06 10:53:08,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:53:08,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-06 10:53:08,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:08,772 INFO L225 Difference]: With dead ends: 41 [2021-05-06 10:53:08,773 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 10:53:08,773 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:08,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 10:53:08,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 10:53:08,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:53:08,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-05-06 10:53:08,776 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 30 [2021-05-06 10:53:08,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:08,776 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-05-06 10:53:08,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:53:08,776 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-05-06 10:53:08,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 10:53:08,777 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:08,777 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:08,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:08,981 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:08,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:08,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1698187712, now seen corresponding path program 1 times [2021-05-06 10:53:08,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:08,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370222981] [2021-05-06 10:53:08,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:08,988 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:08,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343009591] [2021-05-06 10:53:08,989 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 10:53:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:09,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:53:09,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:09,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 10:53:09,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:09,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370222981] [2021-05-06 10:53:09,130 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:09,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343009591] [2021-05-06 10:53:09,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343009591] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:09,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:09,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:53:09,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883791899] [2021-05-06 10:53:09,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:53:09,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:09,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:53:09,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:09,131 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:53:09,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:09,194 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-05-06 10:53:09,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:53:09,194 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-06 10:53:09,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:09,195 INFO L225 Difference]: With dead ends: 52 [2021-05-06 10:53:09,195 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 10:53:09,195 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:53:09,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 10:53:09,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-05-06 10:53:09,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 10:53:09,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-05-06 10:53:09,199 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 30 [2021-05-06 10:53:09,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:09,200 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-05-06 10:53:09,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:53:09,200 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-05-06 10:53:09,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 10:53:09,200 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:09,201 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:09,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:09,413 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:09,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:09,413 INFO L82 PathProgramCache]: Analyzing trace with hash 888200606, now seen corresponding path program 2 times [2021-05-06 10:53:09,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:09,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950142959] [2021-05-06 10:53:09,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:09,419 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:09,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541973067] [2021-05-06 10:53:09,419 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 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 10:53:09,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:53:09,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:09,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:53:09,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:09,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:09,551 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 10:53:09,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:09,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950142959] [2021-05-06 10:53:09,552 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:09,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541973067] [2021-05-06 10:53:09,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541973067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:09,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:09,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:53:09,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202449533] [2021-05-06 10:53:09,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:53:09,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:09,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:53:09,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:09,553 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 10:53:09,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:09,633 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2021-05-06 10:53:09,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:53:09,634 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-05-06 10:53:09,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:09,637 INFO L225 Difference]: With dead ends: 56 [2021-05-06 10:53:09,637 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 10:53:09,637 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:53:09,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 10:53:09,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-06 10:53:09,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 10:53:09,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2021-05-06 10:53:09,651 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 35 [2021-05-06 10:53:09,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:09,651 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2021-05-06 10:53:09,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 10:53:09,651 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2021-05-06 10:53:09,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 10:53:09,654 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:09,654 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:09,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:09,869 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:09,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:09,869 INFO L82 PathProgramCache]: Analyzing trace with hash -880778788, now seen corresponding path program 3 times [2021-05-06 10:53:09,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:09,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157306660] [2021-05-06 10:53:09,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:09,874 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:09,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [879100303] [2021-05-06 10:53:09,875 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 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 10:53:09,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 10:53:09,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:09,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:53:09,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:10,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:10,021 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 10:53:10,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:10,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157306660] [2021-05-06 10:53:10,022 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:10,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879100303] [2021-05-06 10:53:10,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879100303] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:10,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:10,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:53:10,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917721784] [2021-05-06 10:53:10,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:53:10,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:10,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:53:10,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:10,023 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 10:53:10,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:10,079 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2021-05-06 10:53:10,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:53:10,079 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2021-05-06 10:53:10,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:10,080 INFO L225 Difference]: With dead ends: 60 [2021-05-06 10:53:10,080 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 10:53:10,080 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:53:10,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 10:53:10,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-05-06 10:53:10,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 10:53:10,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2021-05-06 10:53:10,083 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 40 [2021-05-06 10:53:10,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:10,083 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2021-05-06 10:53:10,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 10:53:10,084 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2021-05-06 10:53:10,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 10:53:10,084 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:10,084 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:10,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:10,295 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:10,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:10,295 INFO L82 PathProgramCache]: Analyzing trace with hash 2014164963, now seen corresponding path program 2 times [2021-05-06 10:53:10,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:10,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220803539] [2021-05-06 10:53:10,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:10,300 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:10,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [643983895] [2021-05-06 10:53:10,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:10,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:53:10,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:10,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 10:53:10,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:10,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:10,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:10,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:10,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:10,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:10,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:10,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:10,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:10,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:10,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:10,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 10:53:10,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:10,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220803539] [2021-05-06 10:53:10,492 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:10,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643983895] [2021-05-06 10:53:10,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643983895] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:10,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:10,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:53:10,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87570708] [2021-05-06 10:53:10,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:53:10,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:10,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:53:10,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:10,493 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 10:53:10,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:10,538 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-05-06 10:53:10,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:53:10,539 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2021-05-06 10:53:10,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:10,539 INFO L225 Difference]: With dead ends: 59 [2021-05-06 10:53:10,539 INFO L226 Difference]: Without dead ends: 59 [2021-05-06 10:53:10,540 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:53:10,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-06 10:53:10,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-06 10:53:10,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 10:53:10,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2021-05-06 10:53:10,552 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 48 [2021-05-06 10:53:10,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:10,554 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2021-05-06 10:53:10,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 10:53:10,556 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2021-05-06 10:53:10,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 10:53:10,556 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:10,556 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:10,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 10:53:10,775 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:10,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:10,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2015237439, now seen corresponding path program 4 times [2021-05-06 10:53:10,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:10,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758663502] [2021-05-06 10:53:10,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:10,785 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:10,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [941877205] [2021-05-06 10:53:10,785 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 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 10:53:10,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 10:53:10,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:10,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:53:10,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:10,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 10:53:10,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:10,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758663502] [2021-05-06 10:53:10,920 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:10,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941877205] [2021-05-06 10:53:10,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941877205] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:10,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:10,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:53:10,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882926535] [2021-05-06 10:53:10,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:53:10,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:10,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:53:10,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:53:10,921 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 10:53:10,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:10,975 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2021-05-06 10:53:10,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:53:10,975 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2021-05-06 10:53:10,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:10,976 INFO L225 Difference]: With dead ends: 63 [2021-05-06 10:53:10,976 INFO L226 Difference]: Without dead ends: 63 [2021-05-06 10:53:10,976 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:53:10,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-06 10:53:10,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-06 10:53:10,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 40 states have internal predecessors, (42), 14 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 10:53:10,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-05-06 10:53:10,979 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 48 [2021-05-06 10:53:10,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:10,979 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-05-06 10:53:10,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 10:53:10,979 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-05-06 10:53:10,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-06 10:53:10,980 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:10,980 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:11,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 10:53:11,197 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:11,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:11,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1772710271, now seen corresponding path program 5 times [2021-05-06 10:53:11,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:11,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229663455] [2021-05-06 10:53:11,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:11,202 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:11,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130214090] [2021-05-06 10:53:11,202 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 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 10:53:11,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-06 10:53:11,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:11,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 10:53:11,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:11,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:11,374 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 10:53:11,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:11,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229663455] [2021-05-06 10:53:11,374 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:11,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130214090] [2021-05-06 10:53:11,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130214090] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:11,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:11,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:53:11,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790871152] [2021-05-06 10:53:11,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:53:11,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:11,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:53:11,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:53:11,375 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 10:53:11,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:11,459 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-05-06 10:53:11,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:53:11,460 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 53 [2021-05-06 10:53:11,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:11,460 INFO L225 Difference]: With dead ends: 74 [2021-05-06 10:53:11,461 INFO L226 Difference]: Without dead ends: 74 [2021-05-06 10:53:11,461 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:53:11,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-06 10:53:11,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-05-06 10:53:11,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 45 states have internal predecessors, (47), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 10:53:11,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2021-05-06 10:53:11,465 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 53 [2021-05-06 10:53:11,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:11,465 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2021-05-06 10:53:11,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 10:53:11,466 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2021-05-06 10:53:11,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 10:53:11,467 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:11,467 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:11,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:11,685 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:11,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:11,685 INFO L82 PathProgramCache]: Analyzing trace with hash 2069437083, now seen corresponding path program 6 times [2021-05-06 10:53:11,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:11,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076445129] [2021-05-06 10:53:11,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:11,690 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:11,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001375938] [2021-05-06 10:53:11,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:53:11,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 10:53:11,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:11,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 10:53:11,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:11,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:11,940 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 27 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 10:53:11,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:11,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076445129] [2021-05-06 10:53:11,940 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:11,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001375938] [2021-05-06 10:53:11,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001375938] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:11,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:11,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:53:11,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134416984] [2021-05-06 10:53:11,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:53:11,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:11,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:53:11,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:53:11,942 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 10:53:12,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:12,070 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2021-05-06 10:53:12,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:53:12,071 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 58 [2021-05-06 10:53:12,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:12,073 INFO L225 Difference]: With dead ends: 78 [2021-05-06 10:53:12,073 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 10:53:12,073 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:53:12,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 10:53:12,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-05-06 10:53:12,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 17 states have call successors, (17), 12 states have call predecessors, (17), 11 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 10:53:12,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2021-05-06 10:53:12,079 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 58 [2021-05-06 10:53:12,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:12,079 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2021-05-06 10:53:12,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 10:53:12,079 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2021-05-06 10:53:12,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 10:53:12,083 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:12,083 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:12,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:12,290 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:12,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:12,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1287458629, now seen corresponding path program 1 times [2021-05-06 10:53:12,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:12,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605435004] [2021-05-06 10:53:12,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:12,296 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:12,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651575125] [2021-05-06 10:53:12,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 10:53:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:12,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:53:12,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:12,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:12,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:12,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:12,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:12,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:12,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:12,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:12,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:12,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:12,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:12,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:12,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:12,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:12,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:12,481 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 54 proven. 132 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-06 10:53:12,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:12,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605435004] [2021-05-06 10:53:12,481 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:12,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651575125] [2021-05-06 10:53:12,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651575125] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:12,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:12,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:53:12,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093306829] [2021-05-06 10:53:12,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:53:12,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:12,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:53:12,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:53:12,483 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 10:53:12,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:12,533 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2021-05-06 10:53:12,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:53:12,533 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2021-05-06 10:53:12,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:12,534 INFO L225 Difference]: With dead ends: 81 [2021-05-06 10:53:12,534 INFO L226 Difference]: Without dead ends: 81 [2021-05-06 10:53:12,534 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:53:12,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-06 10:53:12,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-06 10:53:12,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 52 states have internal predecessors, (54), 17 states have call successors, (17), 13 states have call predecessors, (17), 12 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 10:53:12,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2021-05-06 10:53:12,540 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 71 [2021-05-06 10:53:12,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:12,541 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2021-05-06 10:53:12,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 10:53:12,541 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2021-05-06 10:53:12,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 10:53:12,541 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:12,541 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:12,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 10:53:12,757 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:12,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:12,757 INFO L82 PathProgramCache]: Analyzing trace with hash 641015584, now seen corresponding path program 7 times [2021-05-06 10:53:12,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:12,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990669090] [2021-05-06 10:53:12,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:12,762 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:12,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1716485504] [2021-05-06 10:53:12,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:53:12,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:12,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 10:53:12,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:12,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 10:53:12,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:12,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990669090] [2021-05-06 10:53:12,939 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:12,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716485504] [2021-05-06 10:53:12,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716485504] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:12,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:12,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:53:12,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458650189] [2021-05-06 10:53:12,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:53:12,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:12,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:53:12,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:53:12,941 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 10:53:13,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:13,026 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2021-05-06 10:53:13,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:53:13,026 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2021-05-06 10:53:13,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:13,027 INFO L225 Difference]: With dead ends: 92 [2021-05-06 10:53:13,027 INFO L226 Difference]: Without dead ends: 92 [2021-05-06 10:53:13,027 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:53:13,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-06 10:53:13,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-05-06 10:53:13,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 57 states have internal predecessors, (59), 22 states have call successors, (22), 14 states have call predecessors, (22), 13 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 10:53:13,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2021-05-06 10:53:13,029 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 71 [2021-05-06 10:53:13,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:13,029 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2021-05-06 10:53:13,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 10:53:13,030 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2021-05-06 10:53:13,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 10:53:13,030 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:13,030 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:13,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 10:53:13,241 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:13,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:13,241 INFO L82 PathProgramCache]: Analyzing trace with hash -846020198, now seen corresponding path program 8 times [2021-05-06 10:53:13,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:13,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238247413] [2021-05-06 10:53:13,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:13,246 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:13,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801212735] [2021-05-06 10:53:13,246 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 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 10:53:13,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:53:13,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:13,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 10:53:13,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:13,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 10:53:13,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:13,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238247413] [2021-05-06 10:53:13,459 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:13,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801212735] [2021-05-06 10:53:13,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801212735] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:13,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:13,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:53:13,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604545974] [2021-05-06 10:53:13,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:53:13,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:13,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:53:13,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:53:13,461 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 10:53:13,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:13,563 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2021-05-06 10:53:13,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:53:13,564 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 76 [2021-05-06 10:53:13,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:13,564 INFO L225 Difference]: With dead ends: 96 [2021-05-06 10:53:13,564 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 10:53:13,565 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:53:13,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 10:53:13,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-06 10:53:13,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 59 states have internal predecessors, (61), 20 states have call successors, (20), 15 states have call predecessors, (20), 14 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 10:53:13,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2021-05-06 10:53:13,567 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 76 [2021-05-06 10:53:13,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:13,567 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2021-05-06 10:53:13,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 10:53:13,567 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2021-05-06 10:53:13,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 10:53:13,568 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:13,568 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:13,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 10:53:13,781 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:13,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:13,781 INFO L82 PathProgramCache]: Analyzing trace with hash -338887002, now seen corresponding path program 2 times [2021-05-06 10:53:13,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:13,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449221791] [2021-05-06 10:53:13,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:13,786 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:13,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921676437] [2021-05-06 10:53:13,786 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 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 10:53:13,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:53:13,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:13,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 10:53:13,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:13,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:13,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:13,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:13,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:13,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:13,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:13,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:13,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:13,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:13,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:13,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:13,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:13,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:13,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:13,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:13,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:13,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-05-06 10:53:13,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:13,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449221791] [2021-05-06 10:53:13,970 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:13,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921676437] [2021-05-06 10:53:13,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921676437] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:13,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:13,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:53:13,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266932882] [2021-05-06 10:53:13,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:53:13,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:13,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:53:13,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:53:13,971 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-06 10:53:14,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:14,051 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2021-05-06 10:53:14,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 10:53:14,051 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 89 [2021-05-06 10:53:14,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:14,052 INFO L225 Difference]: With dead ends: 99 [2021-05-06 10:53:14,052 INFO L226 Difference]: Without dead ends: 99 [2021-05-06 10:53:14,052 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:53:14,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-06 10:53:14,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-06 10:53:14,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 64 states have internal predecessors, (66), 20 states have call successors, (20), 16 states have call predecessors, (20), 15 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 10:53:14,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2021-05-06 10:53:14,055 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 89 [2021-05-06 10:53:14,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:14,055 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2021-05-06 10:53:14,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-06 10:53:14,055 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2021-05-06 10:53:14,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 10:53:14,055 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:14,055 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:14,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:14,268 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:14,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:14,269 INFO L82 PathProgramCache]: Analyzing trace with hash -985330047, now seen corresponding path program 9 times [2021-05-06 10:53:14,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:14,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034486668] [2021-05-06 10:53:14,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:14,274 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:14,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2012497626] [2021-05-06 10:53:14,274 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 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 10:53:14,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 10:53:14,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:14,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 10:53:14,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:14,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:14,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:14,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:14,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:14,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:14,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:14,546 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-05-06 10:53:14,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:14,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034486668] [2021-05-06 10:53:14,546 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:14,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012497626] [2021-05-06 10:53:14,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012497626] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:14,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:14,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:53:14,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277395724] [2021-05-06 10:53:14,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:53:14,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:14,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:53:14,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:53:14,548 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 10:53:14,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:14,676 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2021-05-06 10:53:14,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:53:14,677 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 89 [2021-05-06 10:53:14,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:14,677 INFO L225 Difference]: With dead ends: 98 [2021-05-06 10:53:14,677 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 10:53:14,677 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:53:14,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 10:53:14,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 10:53:14,678 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 10:53:14,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 10:53:14,678 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 89 [2021-05-06 10:53:14,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:14,678 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 10:53:14,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 10:53:14,678 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 10:53:14,678 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 10:53:14,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 10:53:14,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:53:14 BasicIcfg [2021-05-06 10:53:14,882 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 10:53:14,882 INFO L168 Benchmark]: Toolchain (without parser) took 8715.65 ms. Allocated memory was 235.9 MB in the beginning and 342.9 MB in the end (delta: 107.0 MB). Free memory was 200.3 MB in the beginning and 172.2 MB in the end (delta: 28.0 MB). Peak memory consumption was 135.3 MB. Max. memory is 8.0 GB. [2021-05-06 10:53:14,882 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 235.9 MB. Free memory is still 216.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:53:14,882 INFO L168 Benchmark]: CACSL2BoogieTranslator took 208.11 ms. Allocated memory is still 235.9 MB. Free memory was 200.1 MB in the beginning and 219.3 MB in the end (delta: -19.2 MB). Peak memory consumption was 14.0 MB. Max. memory is 8.0 GB. [2021-05-06 10:53:14,882 INFO L168 Benchmark]: Boogie Preprocessor took 39.42 ms. Allocated memory is still 235.9 MB. Free memory was 219.3 MB in the beginning and 217.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 10:53:14,882 INFO L168 Benchmark]: RCFGBuilder took 274.88 ms. Allocated memory is still 235.9 MB. Free memory was 217.8 MB in the beginning and 203.4 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 10:53:14,882 INFO L168 Benchmark]: IcfgTransformer took 15.10 ms. Allocated memory is still 235.9 MB. Free memory was 203.1 MB in the beginning and 202.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 10:53:14,882 INFO L168 Benchmark]: TraceAbstraction took 8164.73 ms. Allocated memory was 235.9 MB in the beginning and 342.9 MB in the end (delta: 107.0 MB). Free memory was 201.7 MB in the beginning and 172.2 MB in the end (delta: 29.4 MB). Peak memory consumption was 137.1 MB. Max. memory is 8.0 GB. [2021-05-06 10:53:14,883 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 235.9 MB. Free memory is still 216.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 208.11 ms. Allocated memory is still 235.9 MB. Free memory was 200.1 MB in the beginning and 219.3 MB in the end (delta: -19.2 MB). Peak memory consumption was 14.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.42 ms. Allocated memory is still 235.9 MB. Free memory was 219.3 MB in the beginning and 217.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 274.88 ms. Allocated memory is still 235.9 MB. Free memory was 217.8 MB in the beginning and 203.4 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 15.10 ms. Allocated memory is still 235.9 MB. Free memory was 203.1 MB in the beginning and 202.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8164.73 ms. Allocated memory was 235.9 MB in the beginning and 342.9 MB in the end (delta: 107.0 MB). Free memory was 201.7 MB in the beginning and 172.2 MB in the end (delta: 29.4 MB). Peak memory consumption was 137.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: 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 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8113.6ms, OverallIterations: 18, TraceHistogramMax: 14, EmptinessCheckTime: 24.1ms, AutomataDifference: 1533.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 557 SDtfs, 128 SDslu, 1717 SDs, 0 SdLazy, 1051 SolverSat, 114 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 854.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 810 GetRequests, 699 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 720.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=17, InterpolantAutomatonStates: 129, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 98.4ms AutomataMinimizationTime, 18 MinimizatonAttempts, 9 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 138.1ms SsaConstructionTime, 472.3ms SatisfiabilityAnalysisTime, 2045.7ms InterpolantComputationTime, 812 NumberOfCodeBlocks, 744 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 794 ConstructedInterpolants, 0 QuantifiedInterpolants, 2528 SizeOfPredicates, 36 NumberOfNonLiveVariables, 2668 ConjunctsInSsa, 221 ConjunctsInUnsatCore, 18 InterpolantComputations, 5 PerfectInterpolantSequences, 1501/2065 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...