/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_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:26:40,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:26:40,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:26:40,355 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 07:26:40,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 07:26:40,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 07:26:40,360 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 07:26:40,361 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 07:26:40,362 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 07:26:40,363 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 07:26:40,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 07:26:40,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 07:26:40,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:26:40,365 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:26:40,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:26:40,366 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:26:40,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:26:40,368 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:26:40,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:26:40,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:26:40,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:26:40,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:26:40,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:26:40,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:26:40,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:26:40,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:26:40,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:26:40,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:26:40,394 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:26:40,402 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:26:40,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:26:40,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:26:40,403 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:26:40,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:26:40,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:26:40,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:26:40,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:26:40,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:26:40,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:26:40,404 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:26:40,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:26:40,404 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:26:40,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:26:40,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:26:40,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:26:40,405 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:26:40,405 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:26:40,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:26:40,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:26:40,405 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:26:40,413 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:26:40,413 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:26:40,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:26:40,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:26:40,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:26:40,678 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:26:40,678 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:26:40,679 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound5.c [2021-05-06 07:26:40,720 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82985278d/2bc25417ed0c49e5b2895d1903798bf7/FLAG15066532d [2021-05-06 07:26:41,097 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:26:41,097 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound5.c [2021-05-06 07:26:41,104 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82985278d/2bc25417ed0c49e5b2895d1903798bf7/FLAG15066532d [2021-05-06 07:26:41,120 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82985278d/2bc25417ed0c49e5b2895d1903798bf7 [2021-05-06 07:26:41,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:26:41,123 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:26:41,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:26:41,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:26:41,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:26:41,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:26:41" (1/1) ... [2021-05-06 07:26:41,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@233f09ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:41, skipping insertion in model container [2021-05-06 07:26:41,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:26:41" (1/1) ... [2021-05-06 07:26:41,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:26:41,150 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:26:41,272 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_valuebound5.c[576,589] [2021-05-06 07:26:41,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:26:41,296 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:26:41,308 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_valuebound5.c[576,589] [2021-05-06 07:26:41,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:26:41,366 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:26:41,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:41 WrapperNode [2021-05-06 07:26:41,367 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:26:41,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:26:41,369 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:26:41,369 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:26:41,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:41" (1/1) ... [2021-05-06 07:26:41,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:41" (1/1) ... [2021-05-06 07:26:41,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:41" (1/1) ... [2021-05-06 07:26:41,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:41" (1/1) ... [2021-05-06 07:26:41,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:41" (1/1) ... [2021-05-06 07:26:41,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:41" (1/1) ... [2021-05-06 07:26:41,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:41" (1/1) ... [2021-05-06 07:26:41,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:26:41,408 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:26:41,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:26:41,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:26:41,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:41" (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 07:26:41,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:26:41,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:26:41,479 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:26:41,479 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:26:41,479 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:26:41,479 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:26:41,479 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:26:41,480 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:26:41,480 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:26:41,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:26:41,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 07:26:41,480 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:26:41,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:26:41,480 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:26:41,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:26:41,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:26:41,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:26:41,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:26:41,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:26:41,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:26:41,661 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:26:41,661 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 07:26:41,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:26:41 BoogieIcfgContainer [2021-05-06 07:26:41,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:26:41,663 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:26:41,663 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:26:41,663 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:26:41,665 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:26:41" (1/1) ... [2021-05-06 07:26:41,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:26:41 BasicIcfg [2021-05-06 07:26:41,676 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:26:41,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:26:41,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:26:41,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:26:41,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:26:41" (1/4) ... [2021-05-06 07:26:41,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@762e6226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:26:41, skipping insertion in model container [2021-05-06 07:26:41,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:41" (2/4) ... [2021-05-06 07:26:41,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@762e6226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:26:41, skipping insertion in model container [2021-05-06 07:26:41,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:26:41" (3/4) ... [2021-05-06 07:26:41,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@762e6226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:26:41, skipping insertion in model container [2021-05-06 07:26:41,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:26:41" (4/4) ... [2021-05-06 07:26:41,698 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound5.cJordan [2021-05-06 07:26:41,701 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:26:41,704 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:26:41,728 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:26:41,754 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:26:41,755 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:26:41,755 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:26:41,755 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:26:41,755 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:26:41,755 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:26:41,755 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:26:41,755 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:26:41,764 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 07:26:41,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 07:26:41,768 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:41,769 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 07:26:41,769 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:41,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:41,773 INFO L82 PathProgramCache]: Analyzing trace with hash 795680375, now seen corresponding path program 1 times [2021-05-06 07:26:41,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:41,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533922273] [2021-05-06 07:26:41,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:41,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:26:41,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:42,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:26:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:42,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 07:26:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:42,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 07:26:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:42,040 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 07:26:42,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:42,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533922273] [2021-05-06 07:26:42,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533922273] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:42,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:42,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:26:42,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046864093] [2021-05-06 07:26:42,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:26:42,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:42,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:26:42,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:26:42,055 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 07:26:42,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:42,133 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-05-06 07:26:42,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:26:42,135 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 07:26:42,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:42,140 INFO L225 Difference]: With dead ends: 39 [2021-05-06 07:26:42,140 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 07:26:42,141 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:26:42,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 07:26:42,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 07:26:42,168 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 07:26:42,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-05-06 07:26:42,170 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 28 [2021-05-06 07:26:42,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:42,171 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-05-06 07:26:42,172 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 07:26:42,172 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-05-06 07:26:42,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 07:26:42,173 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:42,173 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 07:26:42,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:26:42,173 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:42,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:42,174 INFO L82 PathProgramCache]: Analyzing trace with hash 797557208, now seen corresponding path program 1 times [2021-05-06 07:26:42,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:42,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125598395] [2021-05-06 07:26:42,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:42,203 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:42,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1847590204] [2021-05-06 07:26:42,203 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 07:26:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:42,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 07:26:42,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:42,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:42,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:42,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:42,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:42,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:42,534 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 07:26:42,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:42,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125598395] [2021-05-06 07:26:42,535 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:42,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847590204] [2021-05-06 07:26:42,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847590204] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:42,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:42,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 07:26:42,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001574987] [2021-05-06 07:26:42,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:26:42,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:42,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:26:42,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:26:42,537 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 07:26:42,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:42,622 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-05-06 07:26:42,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:26:42,623 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 07:26:42,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:42,624 INFO L225 Difference]: With dead ends: 43 [2021-05-06 07:26:42,624 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 07:26:42,624 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:26:42,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 07:26:42,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-06 07:26:42,628 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 07:26:42,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-06 07:26:42,629 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 28 [2021-05-06 07:26:42,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:42,629 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-06 07:26:42,630 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 07:26:42,630 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-06 07:26:42,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 07:26:42,630 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:42,630 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 07:26:42,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 07:26:42,846 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:42,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:42,846 INFO L82 PathProgramCache]: Analyzing trace with hash 648866686, now seen corresponding path program 1 times [2021-05-06 07:26:42,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:42,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508962646] [2021-05-06 07:26:42,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:42,856 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:42,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513556012] [2021-05-06 07:26:42,857 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 07:26:42,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:42,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 07:26:42,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:42,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:42,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:43,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:43,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:43,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:43,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:43,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:43,045 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 07:26:43,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:43,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508962646] [2021-05-06 07:26:43,045 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:43,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513556012] [2021-05-06 07:26:43,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513556012] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:43,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:43,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 07:26:43,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546976374] [2021-05-06 07:26:43,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:26:43,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:43,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:26:43,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:26:43,047 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 07:26:43,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:43,146 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2021-05-06 07:26:43,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:26:43,146 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 07:26:43,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:43,147 INFO L225 Difference]: With dead ends: 55 [2021-05-06 07:26:43,147 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 07:26:43,147 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:26:43,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 07:26:43,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-06 07:26:43,151 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 07:26:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2021-05-06 07:26:43,152 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 33 [2021-05-06 07:26:43,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:43,153 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2021-05-06 07:26:43,153 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 07:26:43,153 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2021-05-06 07:26:43,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 07:26:43,154 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:43,154 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 07:26:43,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:43,377 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:43,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:43,378 INFO L82 PathProgramCache]: Analyzing trace with hash 619469170, now seen corresponding path program 1 times [2021-05-06 07:26:43,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:43,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054027871] [2021-05-06 07:26:43,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:43,398 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:43,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442156936] [2021-05-06 07:26:43,398 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 07:26:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:43,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:26:43,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:43,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:43,545 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 07:26:43,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:43,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054027871] [2021-05-06 07:26:43,545 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:43,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442156936] [2021-05-06 07:26:43,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442156936] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:43,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:43,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:26:43,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144929473] [2021-05-06 07:26:43,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:26:43,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:43,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:26:43,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:26:43,547 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 07:26:43,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:43,615 INFO L93 Difference]: Finished difference Result 77 states and 103 transitions. [2021-05-06 07:26:43,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:26:43,616 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 07:26:43,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:43,617 INFO L225 Difference]: With dead ends: 77 [2021-05-06 07:26:43,617 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 07:26:43,617 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:26:43,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 07:26:43,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2021-05-06 07:26:43,622 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 07:26:43,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2021-05-06 07:26:43,624 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 40 [2021-05-06 07:26:43,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:43,624 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2021-05-06 07:26:43,624 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 07:26:43,624 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2021-05-06 07:26:43,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 07:26:43,625 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:43,625 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 07:26:43,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:43,835 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:43,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:43,835 INFO L82 PathProgramCache]: Analyzing trace with hash -574143214, now seen corresponding path program 1 times [2021-05-06 07:26:43,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:43,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995243709] [2021-05-06 07:26:43,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:43,845 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:43,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130868680] [2021-05-06 07:26:43,846 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 07:26:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:43,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:26:43,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:43,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:43,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:43,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:43,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:43,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:43,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:43,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:43,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:43,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:44,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:44,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:44,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:44,030 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 07:26:44,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:44,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995243709] [2021-05-06 07:26:44,031 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:44,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130868680] [2021-05-06 07:26:44,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130868680] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:44,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:44,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 07:26:44,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920375009] [2021-05-06 07:26:44,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:26:44,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:44,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:26:44,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:26:44,032 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 07:26:44,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:44,116 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2021-05-06 07:26:44,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:26:44,116 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 07:26:44,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:44,118 INFO L225 Difference]: With dead ends: 74 [2021-05-06 07:26:44,118 INFO L226 Difference]: Without dead ends: 74 [2021-05-06 07:26:44,118 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:26:44,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-06 07:26:44,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-06 07:26:44,123 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 07:26:44,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2021-05-06 07:26:44,124 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 50 [2021-05-06 07:26:44,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:44,124 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2021-05-06 07:26:44,124 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 07:26:44,125 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2021-05-06 07:26:44,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 07:26:44,125 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:44,125 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 07:26:44,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:44,341 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:44,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:44,342 INFO L82 PathProgramCache]: Analyzing trace with hash -810208713, now seen corresponding path program 1 times [2021-05-06 07:26:44,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:44,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375816191] [2021-05-06 07:26:44,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:44,349 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:44,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [214506629] [2021-05-06 07:26:44,349 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 07:26:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:44,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:26:44,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:44,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:44,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:44,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:44,518 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 07:26:44,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:44,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375816191] [2021-05-06 07:26:44,518 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:44,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214506629] [2021-05-06 07:26:44,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214506629] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:44,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:44,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:26:44,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125108203] [2021-05-06 07:26:44,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:26:44,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:44,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:26:44,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:26:44,520 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 07:26:44,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:44,616 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2021-05-06 07:26:44,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:26:44,616 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 07:26:44,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:44,617 INFO L225 Difference]: With dead ends: 78 [2021-05-06 07:26:44,617 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 07:26:44,617 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:26:44,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 07:26:44,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-06 07:26:44,621 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 07:26:44,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 98 transitions. [2021-05-06 07:26:44,622 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 98 transitions. Word has length 56 [2021-05-06 07:26:44,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:44,622 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 98 transitions. [2021-05-06 07:26:44,623 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 07:26:44,623 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 98 transitions. [2021-05-06 07:26:44,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-06 07:26:44,623 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:44,623 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 07:26:44,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 07:26:44,831 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:44,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:44,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1603019557, now seen corresponding path program 1 times [2021-05-06 07:26:44,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:44,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397496389] [2021-05-06 07:26:44,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:44,839 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:44,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [147033020] [2021-05-06 07:26:44,839 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 07:26:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:44,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 07:26:44,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:45,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:45,026 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 07:26:45,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:45,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397496389] [2021-05-06 07:26:45,027 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:45,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147033020] [2021-05-06 07:26:45,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147033020] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:45,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:45,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:26:45,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518358602] [2021-05-06 07:26:45,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:26:45,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:45,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:26:45,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:26:45,028 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 07:26:45,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:45,123 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2021-05-06 07:26:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:26:45,123 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 07:26:45,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:45,126 INFO L225 Difference]: With dead ends: 109 [2021-05-06 07:26:45,126 INFO L226 Difference]: Without dead ends: 108 [2021-05-06 07:26:45,127 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:26:45,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-06 07:26:45,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2021-05-06 07:26:45,134 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 07:26:45,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 132 transitions. [2021-05-06 07:26:45,135 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 132 transitions. Word has length 63 [2021-05-06 07:26:45,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:45,135 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 132 transitions. [2021-05-06 07:26:45,135 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 07:26:45,135 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 132 transitions. [2021-05-06 07:26:45,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 07:26:45,136 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:45,136 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 07:26:45,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:45,345 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:45,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:45,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1439194403, now seen corresponding path program 1 times [2021-05-06 07:26:45,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:45,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565136618] [2021-05-06 07:26:45,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:45,353 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:45,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143254693] [2021-05-06 07:26:45,353 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 07:26:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:45,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 07:26:45,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:45,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:45,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:45,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:45,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:45,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:45,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:45,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:45,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:45,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:45,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:45,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:45,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:45,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 48 proven. 28 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 07:26:45,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:45,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565136618] [2021-05-06 07:26:45,749 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:45,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143254693] [2021-05-06 07:26:45,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143254693] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:45,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:45,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 07:26:45,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972268615] [2021-05-06 07:26:45,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 07:26:45,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:45,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 07:26:45,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 07:26:45,750 INFO L87 Difference]: Start difference. First operand 103 states and 132 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-06 07:26:46,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:46,004 INFO L93 Difference]: Finished difference Result 145 states and 189 transitions. [2021-05-06 07:26:46,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 07:26:46,004 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 86 [2021-05-06 07:26:46,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:46,005 INFO L225 Difference]: With dead ends: 145 [2021-05-06 07:26:46,005 INFO L226 Difference]: Without dead ends: 144 [2021-05-06 07:26:46,006 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 127.1ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-06 07:26:46,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-06 07:26:46,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 139. [2021-05-06 07:26:46,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 78 states have (on average 1.141025641025641) internal successors, (89), 80 states have internal predecessors, (89), 47 states have call successors, (47), 14 states have call predecessors, (47), 13 states have return successors, (45), 44 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-06 07:26:46,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 181 transitions. [2021-05-06 07:26:46,013 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 181 transitions. Word has length 86 [2021-05-06 07:26:46,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:46,013 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 181 transitions. [2021-05-06 07:26:46,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-06 07:26:46,013 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 181 transitions. [2021-05-06 07:26:46,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 07:26:46,014 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:46,014 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 07:26:46,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:46,231 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:46,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:46,231 INFO L82 PathProgramCache]: Analyzing trace with hash -120599176, now seen corresponding path program 2 times [2021-05-06 07:26:46,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:46,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952920291] [2021-05-06 07:26:46,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:46,250 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:46,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727110371] [2021-05-06 07:26:46,250 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 07:26:46,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:26:46,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:26:46,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 07:26:46,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:46,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:46,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:46,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:46,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:46,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:46,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:46,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:46,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:46,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:46,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:46,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:46,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:46,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:46,455 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 07:26:46,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:46,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952920291] [2021-05-06 07:26:46,455 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:46,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727110371] [2021-05-06 07:26:46,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727110371] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:46,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:46,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:26:46,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591563017] [2021-05-06 07:26:46,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:26:46,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:46,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:26:46,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:26:46,457 INFO L87 Difference]: Start difference. First operand 139 states and 181 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 07:26:46,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:46,493 INFO L93 Difference]: Finished difference Result 134 states and 169 transitions. [2021-05-06 07:26:46,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:26:46,494 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 07:26:46,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:46,495 INFO L225 Difference]: With dead ends: 134 [2021-05-06 07:26:46,495 INFO L226 Difference]: Without dead ends: 125 [2021-05-06 07:26:46,495 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:26:46,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-06 07:26:46,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 120. [2021-05-06 07:26:46,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 69 states have internal predecessors, (76), 39 states have call successors, (39), 13 states have call predecessors, (39), 12 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 07:26:46,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 152 transitions. [2021-05-06 07:26:46,501 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 152 transitions. Word has length 93 [2021-05-06 07:26:46,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:46,501 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 152 transitions. [2021-05-06 07:26:46,502 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 07:26:46,502 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 152 transitions. [2021-05-06 07:26:46,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-06 07:26:46,503 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:46,503 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 07:26:46,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 07:26:46,725 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:46,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:46,725 INFO L82 PathProgramCache]: Analyzing trace with hash -2120729957, now seen corresponding path program 2 times [2021-05-06 07:26:46,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:46,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328322337] [2021-05-06 07:26:46,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:46,734 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:46,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533866629] [2021-05-06 07:26:46,734 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 07:26:46,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:26:46,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:26:46,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 07:26:46,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:46,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:47,004 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 07:26:47,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:47,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328322337] [2021-05-06 07:26:47,004 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:47,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533866629] [2021-05-06 07:26:47,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533866629] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:47,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:47,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 07:26:47,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113231011] [2021-05-06 07:26:47,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 07:26:47,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:47,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 07:26:47,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:26:47,005 INFO L87 Difference]: Start difference. First operand 120 states and 152 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 07:26:47,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:47,266 INFO L93 Difference]: Finished difference Result 162 states and 209 transitions. [2021-05-06 07:26:47,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 07:26:47,267 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 07:26:47,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:47,268 INFO L225 Difference]: With dead ends: 162 [2021-05-06 07:26:47,268 INFO L226 Difference]: Without dead ends: 161 [2021-05-06 07:26:47,268 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 07:26:47,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-06 07:26:47,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 156. [2021-05-06 07:26:47,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 88 states have (on average 1.125) internal successors, (99), 89 states have internal predecessors, (99), 52 states have call successors, (52), 16 states have call predecessors, (52), 15 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 07:26:47,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 201 transitions. [2021-05-06 07:26:47,276 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 201 transitions. Word has length 109 [2021-05-06 07:26:47,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:47,276 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 201 transitions. [2021-05-06 07:26:47,276 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 07:26:47,276 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 201 transitions. [2021-05-06 07:26:47,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 07:26:47,277 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:47,277 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 07:26:47,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:47,493 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:47,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:47,494 INFO L82 PathProgramCache]: Analyzing trace with hash 435194, now seen corresponding path program 3 times [2021-05-06 07:26:47,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:47,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089314395] [2021-05-06 07:26:47,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:47,501 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:47,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933076032] [2021-05-06 07:26:47,502 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 07:26:47,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 07:26:47,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:26:47,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 07:26:47,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:47,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:47,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:47,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:47,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:47,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:47,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:47,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:47,784 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 07:26:47,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:47,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089314395] [2021-05-06 07:26:47,784 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:47,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933076032] [2021-05-06 07:26:47,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933076032] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:47,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:47,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 07:26:47,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355297950] [2021-05-06 07:26:47,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 07:26:47,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:47,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 07:26:47,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:26:47,786 INFO L87 Difference]: Start difference. First operand 156 states and 201 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 07:26:48,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:48,070 INFO L93 Difference]: Finished difference Result 168 states and 214 transitions. [2021-05-06 07:26:48,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 07:26:48,070 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 07:26:48,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:48,071 INFO L225 Difference]: With dead ends: 168 [2021-05-06 07:26:48,071 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 07:26:48,071 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-05-06 07:26:48,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 07:26:48,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 07:26:48,072 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 07:26:48,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 07:26:48,072 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 116 [2021-05-06 07:26:48,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:48,072 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 07:26:48,072 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 07:26:48,072 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 07:26:48,072 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 07:26:48,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:48,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:26:48 BasicIcfg [2021-05-06 07:26:48,295 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 07:26:48,295 INFO L168 Benchmark]: Toolchain (without parser) took 7171.96 ms. Allocated memory was 199.2 MB in the beginning and 287.3 MB in the end (delta: 88.1 MB). Free memory was 165.5 MB in the beginning and 149.3 MB in the end (delta: 16.2 MB). Peak memory consumption was 103.8 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:48,295 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 199.2 MB. Free memory is still 182.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 07:26:48,295 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.15 ms. Allocated memory is still 199.2 MB. Free memory was 165.3 MB in the beginning and 183.1 MB in the end (delta: -17.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:48,295 INFO L168 Benchmark]: Boogie Preprocessor took 38.11 ms. Allocated memory is still 199.2 MB. Free memory was 183.1 MB in the beginning and 181.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:48,295 INFO L168 Benchmark]: RCFGBuilder took 254.52 ms. Allocated memory is still 199.2 MB. Free memory was 181.6 MB in the beginning and 165.8 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:48,295 INFO L168 Benchmark]: IcfgTransformer took 13.79 ms. Allocated memory is still 199.2 MB. Free memory was 165.8 MB in the beginning and 164.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:48,295 INFO L168 Benchmark]: TraceAbstraction took 6617.17 ms. Allocated memory was 199.2 MB in the beginning and 287.3 MB in the end (delta: 88.1 MB). Free memory was 163.8 MB in the beginning and 149.3 MB in the end (delta: 14.5 MB). Peak memory consumption was 103.5 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:48,296 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 199.2 MB. Free memory is still 182.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 243.15 ms. Allocated memory is still 199.2 MB. Free memory was 165.3 MB in the beginning and 183.1 MB in the end (delta: -17.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.11 ms. Allocated memory is still 199.2 MB. Free memory was 183.1 MB in the beginning and 181.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 254.52 ms. Allocated memory is still 199.2 MB. Free memory was 181.6 MB in the beginning and 165.8 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 13.79 ms. Allocated memory is still 199.2 MB. Free memory was 165.8 MB in the beginning and 164.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6617.17 ms. Allocated memory was 199.2 MB in the beginning and 287.3 MB in the end (delta: 88.1 MB). Free memory was 163.8 MB in the beginning and 149.3 MB in the end (delta: 14.5 MB). Peak memory consumption was 103.5 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: 6538.8ms, OverallIterations: 11, TraceHistogramMax: 16, EmptinessCheckTime: 15.0ms, AutomataDifference: 1484.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 447 SDtfs, 234 SDslu, 1618 SDs, 0 SdLazy, 1487 SolverSat, 185 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 957.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 698 GetRequests, 606 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 633.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=156occurred in iteration=10, InterpolantAutomatonStates: 89, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 73.7ms AutomataMinimizationTime, 11 MinimizatonAttempts, 31 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 94.9ms SsaConstructionTime, 290.2ms SatisfiabilityAnalysisTime, 1913.9ms InterpolantComputationTime, 702 NumberOfCodeBlocks, 650 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 691 ConstructedInterpolants, 0 QuantifiedInterpolants, 1952 SizeOfPredicates, 34 NumberOfNonLiveVariables, 1900 ConjunctsInSsa, 175 ConjunctsInUnsatCore, 11 InterpolantComputations, 6 PerfectInterpolantSequences, 1538/1653 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...