/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/cohendiv-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:26:20,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:26:20,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:26:20,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 07:26:20,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 07:26:20,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 07:26:20,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 07:26:20,348 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 07:26:20,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 07:26:20,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 07:26:20,353 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 07:26:20,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 07:26:20,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:26:20,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:26:20,357 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:26:20,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:26:20,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:26:20,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:26:20,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:26:20,366 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:26:20,368 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:26:20,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:26:20,369 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:26:20,371 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:26:20,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:26:20,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:26:20,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:26:20,382 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:26:20,383 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:26:20,394 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:26:20,394 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:26:20,396 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:26:20,396 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:26:20,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:26:20,397 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:26:20,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:26:20,397 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:26:20,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:26:20,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:26:20,397 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:26:20,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:26:20,398 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:26:20,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:26:20,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:26:20,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:26:20,398 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:26:20,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:26:20,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:26:20,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:26:20,399 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:26:20,400 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:26:20,400 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:26:20,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:26:20,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:26:20,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:26:20,682 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:26:20,682 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:26:20,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound10.c [2021-05-06 07:26:20,742 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6affb9ce/2edaaea38fa349e4af0d49a41472fbfc/FLAGda49e1285 [2021-05-06 07:26:21,100 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:26:21,101 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound10.c [2021-05-06 07:26:21,106 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6affb9ce/2edaaea38fa349e4af0d49a41472fbfc/FLAGda49e1285 [2021-05-06 07:26:21,118 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6affb9ce/2edaaea38fa349e4af0d49a41472fbfc [2021-05-06 07:26:21,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:26:21,122 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:26:21,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:26:21,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:26:21,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:26:21,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:26:21" (1/1) ... [2021-05-06 07:26:21,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cb17695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:21, skipping insertion in model container [2021-05-06 07:26:21,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:26:21" (1/1) ... [2021-05-06 07:26:21,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:26:21,143 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:26:21,267 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/cohendiv-ll_valuebound10.c[576,589] [2021-05-06 07:26:21,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:26:21,285 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:26:21,293 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/cohendiv-ll_valuebound10.c[576,589] [2021-05-06 07:26:21,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:26:21,315 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:26:21,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:21 WrapperNode [2021-05-06 07:26:21,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:26:21,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:26:21,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:26:21,316 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:26:21,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:21" (1/1) ... [2021-05-06 07:26:21,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:21" (1/1) ... [2021-05-06 07:26:21,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:21" (1/1) ... [2021-05-06 07:26:21,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:21" (1/1) ... [2021-05-06 07:26:21,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:21" (1/1) ... [2021-05-06 07:26:21,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:21" (1/1) ... [2021-05-06 07:26:21,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:21" (1/1) ... [2021-05-06 07:26:21,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:26:21,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:26:21,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:26:21,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:26:21,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:21" (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 07:26:21,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:26:21,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:26:21,415 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:26:21,415 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:26:21,416 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:26:21,416 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:26:21,416 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:26:21,416 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:26:21,416 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:26:21,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:26:21,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 07:26:21,416 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:26:21,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:26:21,417 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:26:21,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:26:21,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:26:21,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:26:21,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:26:21,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:26:21,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:26:21,648 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:26:21,649 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 07:26:21,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:26:21 BoogieIcfgContainer [2021-05-06 07:26:21,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:26:21,650 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:26:21,650 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:26:21,651 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:26:21,652 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:26:21" (1/1) ... [2021-05-06 07:26:21,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:26:21 BasicIcfg [2021-05-06 07:26:21,689 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:26:21,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:26:21,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:26:21,692 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:26:21,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:26:21" (1/4) ... [2021-05-06 07:26:21,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34347af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:26:21, skipping insertion in model container [2021-05-06 07:26:21,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:21" (2/4) ... [2021-05-06 07:26:21,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34347af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:26:21, skipping insertion in model container [2021-05-06 07:26:21,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:26:21" (3/4) ... [2021-05-06 07:26:21,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34347af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:26:21, skipping insertion in model container [2021-05-06 07:26:21,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:26:21" (4/4) ... [2021-05-06 07:26:21,693 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound10.cJordan [2021-05-06 07:26:21,697 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:26:21,699 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:26:21,723 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:26:21,751 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:26:21,751 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:26:21,751 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:26:21,751 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:26:21,751 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:26:21,751 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:26:21,751 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:26:21,751 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:26:21,765 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 07:26:21,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 07:26:21,769 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:21,770 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:21,770 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:21,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:21,773 INFO L82 PathProgramCache]: Analyzing trace with hash 795680375, now seen corresponding path program 1 times [2021-05-06 07:26:21,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:21,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782411217] [2021-05-06 07:26:21,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:21,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:26:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:22,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:26:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:22,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 07:26:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:22,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 07:26:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 07:26:22,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:22,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782411217] [2021-05-06 07:26:22,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782411217] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:22,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:22,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:26:22,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813042653] [2021-05-06 07:26:22,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:26:22,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:22,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:26:22,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:26:22,044 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 07:26:22,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:22,189 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-05-06 07:26:22,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:26:22,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-06 07:26:22,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:22,196 INFO L225 Difference]: With dead ends: 39 [2021-05-06 07:26:22,196 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 07:26:22,197 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:26:22,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 07:26:22,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 07:26:22,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 07:26:22,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-05-06 07:26:22,224 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 28 [2021-05-06 07:26:22,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:22,226 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-05-06 07:26:22,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 07:26:22,226 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-05-06 07:26:22,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 07:26:22,227 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:22,227 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:22,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:26:22,228 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:22,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:22,228 INFO L82 PathProgramCache]: Analyzing trace with hash 797557208, now seen corresponding path program 1 times [2021-05-06 07:26:22,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:22,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599853495] [2021-05-06 07:26:22,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:22,259 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:22,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269591224] [2021-05-06 07:26:22,260 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 07:26:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:22,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 07:26:22,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:22,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 07:26:22,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:22,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599853495] [2021-05-06 07:26:22,477 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:22,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269591224] [2021-05-06 07:26:22,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269591224] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:22,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:22,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 07:26:22,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449247065] [2021-05-06 07:26:22,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:26:22,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:22,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:26:22,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:26:22,479 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:26:22,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:22,565 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-05-06 07:26:22,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:26:22,566 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 07:26:22,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:22,566 INFO L225 Difference]: With dead ends: 43 [2021-05-06 07:26:22,567 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 07:26:22,567 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:26:22,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 07:26:22,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-06 07:26:22,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 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 07:26:22,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-06 07:26:22,572 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 28 [2021-05-06 07:26:22,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:22,573 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-06 07:26:22,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:26:22,573 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-06 07:26:22,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 07:26:22,574 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:22,574 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:22,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 07:26:22,791 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:22,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:22,792 INFO L82 PathProgramCache]: Analyzing trace with hash 648866686, now seen corresponding path program 1 times [2021-05-06 07:26:22,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:22,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492358667] [2021-05-06 07:26:22,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:22,800 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:22,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807321365] [2021-05-06 07:26:22,801 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 07:26:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:22,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 07:26:22,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:22,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 07:26:22,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:22,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492358667] [2021-05-06 07:26:22,968 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:22,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807321365] [2021-05-06 07:26:22,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807321365] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:22,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:22,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 07:26:22,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30500224] [2021-05-06 07:26:22,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:26:22,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:22,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:26:22,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:26:22,969 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 9 states, 8 states have (on average 2.25) 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, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 07:26:23,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:23,055 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2021-05-06 07:26:23,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:26:23,056 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) 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, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2021-05-06 07:26:23,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:23,057 INFO L225 Difference]: With dead ends: 55 [2021-05-06 07:26:23,057 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 07:26:23,057 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:26:23,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 07:26:23,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-06 07:26:23,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 07:26:23,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2021-05-06 07:26:23,062 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 33 [2021-05-06 07:26:23,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:23,062 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2021-05-06 07:26:23,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) 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, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 07:26:23,062 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2021-05-06 07:26:23,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 07:26:23,063 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:23,063 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:23,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:23,280 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:23,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:23,280 INFO L82 PathProgramCache]: Analyzing trace with hash 619469170, now seen corresponding path program 1 times [2021-05-06 07:26:23,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:23,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739732399] [2021-05-06 07:26:23,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:23,288 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:23,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326104524] [2021-05-06 07:26:23,288 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 07:26:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:23,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:26:23,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:23,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 07:26:23,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:23,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739732399] [2021-05-06 07:26:23,392 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:23,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326104524] [2021-05-06 07:26:23,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326104524] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:23,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:23,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:26:23,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51766796] [2021-05-06 07:26:23,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:26:23,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:23,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:26:23,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:26:23,394 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 07:26:23,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:23,433 INFO L93 Difference]: Finished difference Result 77 states and 103 transitions. [2021-05-06 07:26:23,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:26:23,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2021-05-06 07:26:23,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:23,435 INFO L225 Difference]: With dead ends: 77 [2021-05-06 07:26:23,435 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 07:26:23,435 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:26:23,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 07:26:23,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2021-05-06 07:26:23,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 07:26:23,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2021-05-06 07:26:23,441 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 40 [2021-05-06 07:26:23,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:23,441 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2021-05-06 07:26:23,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 07:26:23,441 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2021-05-06 07:26:23,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 07:26:23,442 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:23,442 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:23,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:23,659 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:23,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:23,660 INFO L82 PathProgramCache]: Analyzing trace with hash -574143214, now seen corresponding path program 1 times [2021-05-06 07:26:23,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:23,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782748503] [2021-05-06 07:26:23,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:23,668 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:23,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946916609] [2021-05-06 07:26:23,669 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 07:26:23,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:23,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:26:23,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:23,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-06 07:26:23,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:23,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782748503] [2021-05-06 07:26:23,830 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:23,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946916609] [2021-05-06 07:26:23,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946916609] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:23,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:23,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 07:26:23,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638178573] [2021-05-06 07:26:23,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:26:23,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:23,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:26:23,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:26:23,831 INFO L87 Difference]: Start difference. First operand 70 states and 92 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 07:26:23,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:23,899 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2021-05-06 07:26:23,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:26:23,900 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), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2021-05-06 07:26:23,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:23,901 INFO L225 Difference]: With dead ends: 74 [2021-05-06 07:26:23,902 INFO L226 Difference]: Without dead ends: 74 [2021-05-06 07:26:23,902 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:26:23,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-06 07:26:23,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-06 07:26:23,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 41 states have (on average 1.146341463414634) internal successors, (47), 43 states have internal predecessors, (47), 25 states have call successors, (25), 8 states have call predecessors, (25), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 07:26:23,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2021-05-06 07:26:23,907 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 50 [2021-05-06 07:26:23,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:23,907 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2021-05-06 07:26:23,907 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), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 07:26:23,907 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2021-05-06 07:26:23,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 07:26:23,908 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:23,908 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:24,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:24,125 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:24,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:24,125 INFO L82 PathProgramCache]: Analyzing trace with hash -810208713, now seen corresponding path program 1 times [2021-05-06 07:26:24,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:24,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176076330] [2021-05-06 07:26:24,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:24,132 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:24,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343047169] [2021-05-06 07:26:24,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:24,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:26:24,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:24,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:24,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:24,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 07:26:24,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:24,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176076330] [2021-05-06 07:26:24,278 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:24,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343047169] [2021-05-06 07:26:24,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343047169] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:24,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:24,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:26:24,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169837811] [2021-05-06 07:26:24,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:26:24,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:24,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:26:24,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:26:24,279 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 07:26:24,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:24,361 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2021-05-06 07:26:24,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:26:24,361 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2021-05-06 07:26:24,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:24,362 INFO L225 Difference]: With dead ends: 78 [2021-05-06 07:26:24,362 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 07:26:24,362 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:26:24,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 07:26:24,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-06 07:26:24,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 07:26:24,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 98 transitions. [2021-05-06 07:26:24,367 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 98 transitions. Word has length 56 [2021-05-06 07:26:24,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:24,367 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 98 transitions. [2021-05-06 07:26:24,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 07:26:24,368 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 98 transitions. [2021-05-06 07:26:24,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-06 07:26:24,368 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:24,368 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:24,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 07:26:24,586 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:24,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:24,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1603019557, now seen corresponding path program 1 times [2021-05-06 07:26:24,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:24,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433169383] [2021-05-06 07:26:24,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:24,593 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:24,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351447370] [2021-05-06 07:26:24,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:24,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 07:26:24,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:24,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:24,766 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-06 07:26:24,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:24,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433169383] [2021-05-06 07:26:24,766 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:24,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351447370] [2021-05-06 07:26:24,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351447370] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:24,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:24,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:26:24,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129961727] [2021-05-06 07:26:24,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:26:24,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:24,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:26:24,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:26:24,770 INFO L87 Difference]: Start difference. First operand 78 states and 98 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 07:26:24,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:24,854 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2021-05-06 07:26:24,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:26:24,855 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2021-05-06 07:26:24,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:24,856 INFO L225 Difference]: With dead ends: 109 [2021-05-06 07:26:24,856 INFO L226 Difference]: Without dead ends: 108 [2021-05-06 07:26:24,856 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:26:24,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-06 07:26:24,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2021-05-06 07:26:24,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 60 states have internal predecessors, (66), 34 states have call successors, (34), 11 states have call predecessors, (34), 10 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 07:26:24,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 132 transitions. [2021-05-06 07:26:24,863 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 132 transitions. Word has length 63 [2021-05-06 07:26:24,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:24,863 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 132 transitions. [2021-05-06 07:26:24,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 07:26:24,863 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 132 transitions. [2021-05-06 07:26:24,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 07:26:24,864 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:24,864 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:25,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:25,082 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:25,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:25,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1439194403, now seen corresponding path program 1 times [2021-05-06 07:26:25,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:25,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315929733] [2021-05-06 07:26:25,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:25,089 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:25,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [654264360] [2021-05-06 07:26:25,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:25,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:25,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 07:26:25,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:25,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-05-06 07:26:25,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:25,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315929733] [2021-05-06 07:26:25,284 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:25,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654264360] [2021-05-06 07:26:25,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654264360] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:25,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:25,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:26:25,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661284002] [2021-05-06 07:26:25,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:26:25,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:25,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:26:25,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:26:25,286 INFO L87 Difference]: Start difference. First operand 103 states and 132 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 07:26:25,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:25,400 INFO L93 Difference]: Finished difference Result 141 states and 186 transitions. [2021-05-06 07:26:25,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:26:25,400 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 86 [2021-05-06 07:26:25,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:25,401 INFO L225 Difference]: With dead ends: 141 [2021-05-06 07:26:25,401 INFO L226 Difference]: Without dead ends: 140 [2021-05-06 07:26:25,402 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:26:25,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-06 07:26:25,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 117. [2021-05-06 07:26:25,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 69 states have internal predecessors, (75), 39 states have call successors, (39), 12 states have call predecessors, (39), 11 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 07:26:25,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 151 transitions. [2021-05-06 07:26:25,409 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 151 transitions. Word has length 86 [2021-05-06 07:26:25,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:25,409 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 151 transitions. [2021-05-06 07:26:25,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 07:26:25,409 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 151 transitions. [2021-05-06 07:26:25,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 07:26:25,410 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:25,410 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:25,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:25,627 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:25,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:25,627 INFO L82 PathProgramCache]: Analyzing trace with hash -120599176, now seen corresponding path program 2 times [2021-05-06 07:26:25,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:25,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337467054] [2021-05-06 07:26:25,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:25,635 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:25,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665372593] [2021-05-06 07:26:25,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:25,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:26:25,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:26:25,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 07:26:25,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:25,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:25,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:25,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:25,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:25,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:25,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:25,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:25,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:25,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:25,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:25,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:25,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:25,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-05-06 07:26:25,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:25,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337467054] [2021-05-06 07:26:25,836 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:25,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665372593] [2021-05-06 07:26:25,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665372593] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:25,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:25,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:26:25,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952889750] [2021-05-06 07:26:25,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:26:25,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:25,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:26:25,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:26:25,837 INFO L87 Difference]: Start difference. First operand 117 states and 151 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-06 07:26:25,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:25,871 INFO L93 Difference]: Finished difference Result 126 states and 163 transitions. [2021-05-06 07:26:25,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:26:25,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 93 [2021-05-06 07:26:25,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:25,873 INFO L225 Difference]: With dead ends: 126 [2021-05-06 07:26:25,873 INFO L226 Difference]: Without dead ends: 121 [2021-05-06 07:26:25,873 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:26:25,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-06 07:26:25,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 116. [2021-05-06 07:26:25,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 65 states have (on average 1.123076923076923) internal successors, (73), 66 states have internal predecessors, (73), 39 states have call successors, (39), 12 states have call predecessors, (39), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 07:26:25,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 149 transitions. [2021-05-06 07:26:25,879 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 149 transitions. Word has length 93 [2021-05-06 07:26:25,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:25,879 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 149 transitions. [2021-05-06 07:26:25,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-06 07:26:25,879 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 149 transitions. [2021-05-06 07:26:25,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-06 07:26:25,880 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:25,880 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:26,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 07:26:26,098 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:26,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:26,098 INFO L82 PathProgramCache]: Analyzing trace with hash -2120729957, now seen corresponding path program 2 times [2021-05-06 07:26:26,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:26,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450180792] [2021-05-06 07:26:26,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:26,105 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:26,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574343557] [2021-05-06 07:26:26,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:26,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:26:26,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:26:26,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 07:26:26,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:26,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 45 proven. 42 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-05-06 07:26:26,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:26,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450180792] [2021-05-06 07:26:26,375 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:26,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574343557] [2021-05-06 07:26:26,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574343557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:26,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:26,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 07:26:26,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638041681] [2021-05-06 07:26:26,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 07:26:26,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:26,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 07:26:26,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:26:26,377 INFO L87 Difference]: Start difference. First operand 116 states and 149 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-05-06 07:26:26,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:26,597 INFO L93 Difference]: Finished difference Result 154 states and 203 transitions. [2021-05-06 07:26:26,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 07:26:26,598 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 109 [2021-05-06 07:26:26,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:26,599 INFO L225 Difference]: With dead ends: 154 [2021-05-06 07:26:26,599 INFO L226 Difference]: Without dead ends: 153 [2021-05-06 07:26:26,599 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 07:26:26,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-06 07:26:26,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 127. [2021-05-06 07:26:26,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 71 states have (on average 1.1267605633802817) internal successors, (80), 72 states have internal predecessors, (80), 43 states have call successors, (43), 13 states have call predecessors, (43), 12 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 07:26:26,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 164 transitions. [2021-05-06 07:26:26,605 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 164 transitions. Word has length 109 [2021-05-06 07:26:26,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:26,606 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 164 transitions. [2021-05-06 07:26:26,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-05-06 07:26:26,606 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 164 transitions. [2021-05-06 07:26:26,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 07:26:26,606 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:26,607 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:26,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:26,813 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:26,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:26,813 INFO L82 PathProgramCache]: Analyzing trace with hash 435194, now seen corresponding path program 3 times [2021-05-06 07:26:26,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:26,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960675445] [2021-05-06 07:26:26,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:26,820 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:26,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551770756] [2021-05-06 07:26:26,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:26,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 07:26:26,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:26:26,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 07:26:26,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:27,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,077 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 123 proven. 35 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-05-06 07:26:27,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:27,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960675445] [2021-05-06 07:26:27,077 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:27,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551770756] [2021-05-06 07:26:27,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551770756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:27,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:27,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 07:26:27,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996609217] [2021-05-06 07:26:27,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 07:26:27,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:27,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 07:26:27,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:26:27,079 INFO L87 Difference]: Start difference. First operand 127 states and 164 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 07:26:27,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:27,279 INFO L93 Difference]: Finished difference Result 135 states and 174 transitions. [2021-05-06 07:26:27,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 07:26:27,280 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) Word has length 116 [2021-05-06 07:26:27,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:27,280 INFO L225 Difference]: With dead ends: 135 [2021-05-06 07:26:27,280 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 07:26:27,280 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-05-06 07:26:27,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 07:26:27,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 07:26:27,281 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 07:26:27,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 07:26:27,281 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 116 [2021-05-06 07:26:27,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:27,281 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 07:26:27,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 07:26:27,281 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 07:26:27,281 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 07:26:27,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:27,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:26:27 BasicIcfg [2021-05-06 07:26:27,486 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 07:26:27,486 INFO L168 Benchmark]: Toolchain (without parser) took 6364.01 ms. Allocated memory was 190.8 MB in the beginning and 377.5 MB in the end (delta: 186.6 MB). Free memory was 154.6 MB in the beginning and 307.6 MB in the end (delta: -153.0 MB). Peak memory consumption was 34.5 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:27,486 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 190.8 MB. Free memory is still 171.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 07:26:27,486 INFO L168 Benchmark]: CACSL2BoogieTranslator took 189.94 ms. Allocated memory is still 190.8 MB. Free memory was 154.4 MB in the beginning and 167.9 MB in the end (delta: -13.5 MB). Peak memory consumption was 7.2 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:27,486 INFO L168 Benchmark]: Boogie Preprocessor took 49.90 ms. Allocated memory is still 190.8 MB. Free memory was 167.9 MB in the beginning and 173.0 MB in the end (delta: -5.1 MB). Peak memory consumption was 2.7 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:27,486 INFO L168 Benchmark]: RCFGBuilder took 282.74 ms. Allocated memory is still 190.8 MB. Free memory was 173.0 MB in the beginning and 156.9 MB in the end (delta: 16.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:27,486 INFO L168 Benchmark]: IcfgTransformer took 38.67 ms. Allocated memory is still 190.8 MB. Free memory was 156.9 MB in the beginning and 155.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:27,486 INFO L168 Benchmark]: TraceAbstraction took 5795.88 ms. Allocated memory was 190.8 MB in the beginning and 377.5 MB in the end (delta: 186.6 MB). Free memory was 155.2 MB in the beginning and 307.6 MB in the end (delta: -152.4 MB). Peak memory consumption was 35.1 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:27,487 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 190.8 MB. Free memory is still 171.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 189.94 ms. Allocated memory is still 190.8 MB. Free memory was 154.4 MB in the beginning and 167.9 MB in the end (delta: -13.5 MB). Peak memory consumption was 7.2 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.90 ms. Allocated memory is still 190.8 MB. Free memory was 167.9 MB in the beginning and 173.0 MB in the end (delta: -5.1 MB). Peak memory consumption was 2.7 MB. Max. memory is 8.0 GB. * RCFGBuilder took 282.74 ms. Allocated memory is still 190.8 MB. Free memory was 173.0 MB in the beginning and 156.9 MB in the end (delta: 16.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 38.67 ms. Allocated memory is still 190.8 MB. Free memory was 156.9 MB in the beginning and 155.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5795.88 ms. Allocated memory was 190.8 MB in the beginning and 377.5 MB in the end (delta: 186.6 MB). Free memory was 155.2 MB in the beginning and 307.6 MB in the end (delta: -152.4 MB). Peak memory consumption was 35.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5733.2ms, OverallIterations: 11, TraceHistogramMax: 16, EmptinessCheckTime: 17.9ms, AutomataDifference: 1200.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 467 SDtfs, 227 SDslu, 1606 SDs, 0 SdLazy, 1287 SolverSat, 167 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 764.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 697 GetRequests, 612 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 472.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=127occurred in iteration=10, InterpolantAutomatonStates: 84, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 70.3ms AutomataMinimizationTime, 11 MinimizatonAttempts, 70 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 84.7ms SsaConstructionTime, 273.2ms SatisfiabilityAnalysisTime, 1495.9ms InterpolantComputationTime, 702 NumberOfCodeBlocks, 650 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 691 ConstructedInterpolants, 0 QuantifiedInterpolants, 1851 SizeOfPredicates, 32 NumberOfNonLiveVariables, 1900 ConjunctsInSsa, 161 ConjunctsInUnsatCore, 11 InterpolantComputations, 6 PerfectInterpolantSequences, 1558/1653 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...