/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 03:17:08,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 03:17:08,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 03:17:08,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-01 03:17:08,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-01 03:17:08,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-01 03:17:08,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-01 03:17:09,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-01 03:17:09,007 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-01 03:17:09,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-01 03:17:09,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-01 03:17:09,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-01 03:17:09,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 03:17:09,014 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 03:17:09,024 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 03:17:09,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 03:17:09,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 03:17:09,029 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 03:17:09,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 03:17:09,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 03:17:09,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 03:17:09,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 03:17:09,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 03:17:09,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 03:17:09,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 03:17:09,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 03:17:09,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 03:17:09,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 03:17:09,062 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-01 03:17:09,081 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 03:17:09,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 03:17:09,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 03:17:09,084 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 03:17:09,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 03:17:09,085 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 03:17:09,085 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 03:17:09,085 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 03:17:09,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 03:17:09,085 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 03:17:09,086 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 03:17:09,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 03:17:09,086 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 03:17:09,087 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 03:17:09,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 03:17:09,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 03:17:09,087 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 03:17:09,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 03:17:09,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 03:17:09,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 03:17:09,088 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-01 03:17:09,089 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-01 03:17:09,089 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 03:17:09,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 03:17:09,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 03:17:09,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 03:17:09,432 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 03:17:09,432 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 03:17:09,433 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2021-05-01 03:17:09,485 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f29c6ee2/1dd532c971624dceb908268cf2dd0c65/FLAG406cb4881 [2021-05-01 03:17:09,977 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 03:17:09,977 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2021-05-01 03:17:09,984 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f29c6ee2/1dd532c971624dceb908268cf2dd0c65/FLAG406cb4881 [2021-05-01 03:17:10,003 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f29c6ee2/1dd532c971624dceb908268cf2dd0c65 [2021-05-01 03:17:10,006 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 03:17:10,008 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-01 03:17:10,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 03:17:10,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 03:17:10,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 03:17:10,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 03:17:10" (1/1) ... [2021-05-01 03:17:10,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dc29e84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:17:10, skipping insertion in model container [2021-05-01 03:17:10,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 03:17:10" (1/1) ... [2021-05-01 03:17:10,023 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 03:17:10,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 03:17:10,193 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i[893,906] [2021-05-01 03:17:10,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 03:17:10,221 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 03:17:10,251 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i[893,906] [2021-05-01 03:17:10,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 03:17:10,290 INFO L208 MainTranslator]: Completed translation [2021-05-01 03:17:10,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:17:10 WrapperNode [2021-05-01 03:17:10,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 03:17:10,292 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 03:17:10,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 03:17:10,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 03:17:10,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:17:10" (1/1) ... [2021-05-01 03:17:10,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:17:10" (1/1) ... [2021-05-01 03:17:10,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:17:10" (1/1) ... [2021-05-01 03:17:10,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:17:10" (1/1) ... [2021-05-01 03:17:10,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:17:10" (1/1) ... [2021-05-01 03:17:10,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:17:10" (1/1) ... [2021-05-01 03:17:10,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:17:10" (1/1) ... [2021-05-01 03:17:10,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 03:17:10,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 03:17:10,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 03:17:10,325 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 03:17:10,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:17:10" (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 [2021-05-01 03:17:10,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 03:17:10,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 03:17:10,394 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 03:17:10,394 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 03:17:10,395 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 03:17:10,395 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 03:17:10,395 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 03:17:10,395 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 03:17:10,395 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-01 03:17:10,395 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-01 03:17:10,395 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 03:17:10,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 03:17:10,396 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 03:17:10,396 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 03:17:10,396 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-01 03:17:10,396 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 03:17:10,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 03:17:10,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 03:17:10,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 03:17:10,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 03:17:10,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 03:17:10,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 03:17:10,616 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 03:17:10,616 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-01 03:17:10,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 03:17:10 BoogieIcfgContainer [2021-05-01 03:17:10,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 03:17:10,618 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-01 03:17:10,618 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-01 03:17:10,619 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-01 03:17:10,621 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 03:17:10" (1/1) ... [2021-05-01 03:17:10,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 01.05 03:17:10 BasicIcfg [2021-05-01 03:17:10,655 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-01 03:17:10,673 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 03:17:10,673 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 03:17:10,676 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 03:17:10,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 03:17:10" (1/4) ... [2021-05-01 03:17:10,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f3319c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 03:17:10, skipping insertion in model container [2021-05-01 03:17:10,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:17:10" (2/4) ... [2021-05-01 03:17:10,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f3319c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 03:17:10, skipping insertion in model container [2021-05-01 03:17:10,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 03:17:10" (3/4) ... [2021-05-01 03:17:10,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f3319c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 03:17:10, skipping insertion in model container [2021-05-01 03:17:10,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 01.05 03:17:10" (4/4) ... [2021-05-01 03:17:10,679 INFO L111 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.iJordan [2021-05-01 03:17:10,684 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-01 03:17:10,688 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 03:17:10,711 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 03:17:10,744 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 03:17:10,744 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-01 03:17:10,744 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-01 03:17:10,744 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 03:17:10,744 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 03:17:10,744 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 03:17:10,744 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 03:17:10,745 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 03:17:10,765 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-01 03:17:10,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-01 03:17:10,771 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 03:17:10,772 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 03:17:10,772 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 03:17:10,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 03:17:10,780 INFO L82 PathProgramCache]: Analyzing trace with hash -868390563, now seen corresponding path program 1 times [2021-05-01 03:17:10,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 03:17:10,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503942405] [2021-05-01 03:17:10,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 03:17:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:11,005 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:11,007 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:11,009 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:11,010 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:11,011 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:11,012 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-05-01 03:17:11,026 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:11,027 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 03:17:11,042 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:11,042 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 03:17:11,053 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:11,053 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:11,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 03:17:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:11,113 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:11,114 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:11,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 03:17:11,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-01 03:17:11,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503942405] [2021-05-01 03:17:11,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503942405] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 03:17:11,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 03:17:11,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-01 03:17:11,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545661126] [2021-05-01 03:17:11,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-01 03:17:11,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-01 03:17:11,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-01 03:17:11,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-01 03:17:11,141 INFO L87 Difference]: Start difference. First operand has 43 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 03:17:11,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 03:17:11,564 INFO L93 Difference]: Finished difference Result 52 states and 74 transitions. [2021-05-01 03:17:11,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-01 03:17:11,565 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-01 03:17:11,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 03:17:11,572 INFO L225 Difference]: With dead ends: 52 [2021-05-01 03:17:11,573 INFO L226 Difference]: Without dead ends: 47 [2021-05-01 03:17:11,574 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 170.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-01 03:17:11,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-01 03:17:11,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2021-05-01 03:17:11,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 19 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-01 03:17:11,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2021-05-01 03:17:11,614 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 14 [2021-05-01 03:17:11,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 03:17:11,615 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2021-05-01 03:17:11,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 03:17:11,615 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2021-05-01 03:17:11,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-01 03:17:11,616 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 03:17:11,616 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 03:17:11,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 03:17:11,617 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 03:17:11,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 03:17:11,617 INFO L82 PathProgramCache]: Analyzing trace with hash -867437251, now seen corresponding path program 1 times [2021-05-01 03:17:11,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 03:17:11,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296483551] [2021-05-01 03:17:11,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 03:17:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:11,647 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:11,648 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:11,649 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:11,649 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:11,650 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:11,651 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 03:17:11,654 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:11,655 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 03:17:11,660 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:11,660 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 03:17:11,665 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:11,666 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:11,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 03:17:11,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:11,692 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:11,692 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 03:17:11,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-01 03:17:11,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296483551] [2021-05-01 03:17:11,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296483551] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 03:17:11,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 03:17:11,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-01 03:17:11,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607443538] [2021-05-01 03:17:11,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-01 03:17:11,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-01 03:17:11,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-01 03:17:11,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-01 03:17:11,696 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 03:17:11,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 03:17:11,982 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2021-05-01 03:17:11,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-01 03:17:11,983 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-01 03:17:11,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 03:17:11,988 INFO L225 Difference]: With dead ends: 53 [2021-05-01 03:17:11,988 INFO L226 Difference]: Without dead ends: 53 [2021-05-01 03:17:11,989 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-01 03:17:11,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-01 03:17:12,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-05-01 03:17:12,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-01 03:17:12,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2021-05-01 03:17:12,007 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 14 [2021-05-01 03:17:12,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 03:17:12,007 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2021-05-01 03:17:12,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 03:17:12,008 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2021-05-01 03:17:12,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-01 03:17:12,009 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 03:17:12,009 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 03:17:12,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 03:17:12,010 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 03:17:12,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 03:17:12,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1607544442, now seen corresponding path program 1 times [2021-05-01 03:17:12,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 03:17:12,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806348724] [2021-05-01 03:17:12,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 03:17:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:12,063 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:12,063 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:12,069 INFO L142 QuantifierPusher]: treesize reduction 9, result has 25.0 percent of original size [2021-05-01 03:17:12,070 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 03:17:12,073 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:12,074 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 03:17:12,078 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:12,078 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 03:17:12,083 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:12,084 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:12,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 03:17:12,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:12,122 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:12,123 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:12,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-01 03:17:12,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:12,134 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:12,135 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:12,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 03:17:12,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-01 03:17:12,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806348724] [2021-05-01 03:17:12,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806348724] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 03:17:12,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 03:17:12,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-01 03:17:12,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616393052] [2021-05-01 03:17:12,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-01 03:17:12,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-01 03:17:12,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-01 03:17:12,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-01 03:17:12,138 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 03:17:12,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 03:17:12,448 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2021-05-01 03:17:12,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-01 03:17:12,449 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-05-01 03:17:12,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 03:17:12,452 INFO L225 Difference]: With dead ends: 55 [2021-05-01 03:17:12,452 INFO L226 Difference]: Without dead ends: 55 [2021-05-01 03:17:12,453 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-01 03:17:12,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-01 03:17:12,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-01 03:17:12,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-01 03:17:12,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2021-05-01 03:17:12,459 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 19 [2021-05-01 03:17:12,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 03:17:12,460 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2021-05-01 03:17:12,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 03:17:12,460 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2021-05-01 03:17:12,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-01 03:17:12,461 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 03:17:12,461 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 03:17:12,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-01 03:17:12,461 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 03:17:12,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 03:17:12,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1153064602, now seen corresponding path program 1 times [2021-05-01 03:17:12,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 03:17:12,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795618836] [2021-05-01 03:17:12,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 03:17:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:12,496 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:12,497 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:12,498 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:12,498 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 03:17:12,502 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:12,502 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 03:17:12,503 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:12,503 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 03:17:12,507 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:12,508 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 03:17:12,512 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:12,513 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 03:17:12,519 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:12,519 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:12,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 03:17:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:12,561 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:12,561 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:12,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-01 03:17:12,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:12,580 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:12,581 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:12,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-01 03:17:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:12,587 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:12,587 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:12,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-01 03:17:12,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-01 03:17:12,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795618836] [2021-05-01 03:17:12,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795618836] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 03:17:12,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 03:17:12,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-01 03:17:12,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558810943] [2021-05-01 03:17:12,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-01 03:17:12,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-01 03:17:12,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-01 03:17:12,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-01 03:17:12,590 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-01 03:17:12,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 03:17:12,950 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2021-05-01 03:17:12,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-01 03:17:12,950 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-01 03:17:12,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 03:17:12,951 INFO L225 Difference]: With dead ends: 59 [2021-05-01 03:17:12,952 INFO L226 Difference]: Without dead ends: 59 [2021-05-01 03:17:12,952 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 153.5ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-01 03:17:12,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-01 03:17:12,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-01 03:17:12,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-01 03:17:12,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2021-05-01 03:17:12,959 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 24 [2021-05-01 03:17:12,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 03:17:12,959 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2021-05-01 03:17:12,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-01 03:17:12,959 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2021-05-01 03:17:12,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-01 03:17:12,960 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 03:17:12,960 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 03:17:12,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-01 03:17:12,961 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 03:17:12,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 03:17:12,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1359459551, now seen corresponding path program 1 times [2021-05-01 03:17:12,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 03:17:12,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197488507] [2021-05-01 03:17:12,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 03:17:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:12,989 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:12,990 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:12,992 INFO L142 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-05-01 03:17:12,992 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 03:17:12,995 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:12,996 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 03:17:12,999 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,000 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 03:17:13,005 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,005 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:13,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 03:17:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:13,041 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,041 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:13,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-01 03:17:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:13,046 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,046 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:13,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-01 03:17:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:13,050 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,051 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:13,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-05-01 03:17:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:13,055 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,055 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-01 03:17:13,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-01 03:17:13,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197488507] [2021-05-01 03:17:13,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197488507] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 03:17:13,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 03:17:13,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-01 03:17:13,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247862156] [2021-05-01 03:17:13,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-01 03:17:13,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-01 03:17:13,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-01 03:17:13,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-01 03:17:13,058 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-01 03:17:13,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 03:17:13,304 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-05-01 03:17:13,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-01 03:17:13,305 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-01 03:17:13,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 03:17:13,306 INFO L225 Difference]: With dead ends: 64 [2021-05-01 03:17:13,307 INFO L226 Difference]: Without dead ends: 64 [2021-05-01 03:17:13,307 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 120.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-01 03:17:13,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-01 03:17:13,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-01 03:17:13,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-01 03:17:13,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-05-01 03:17:13,313 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 29 [2021-05-01 03:17:13,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 03:17:13,313 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-05-01 03:17:13,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-01 03:17:13,313 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-05-01 03:17:13,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-01 03:17:13,315 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 03:17:13,315 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 03:17:13,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-01 03:17:13,315 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 03:17:13,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 03:17:13,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1056918318, now seen corresponding path program 1 times [2021-05-01 03:17:13,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 03:17:13,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439023768] [2021-05-01 03:17:13,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 03:17:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:13,343 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,344 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:13,345 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,345 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 03:17:13,348 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,349 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 03:17:13,352 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,353 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 03:17:13,357 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,357 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 03:17:13,362 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,363 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:13,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 03:17:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:13,385 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,385 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:13,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-01 03:17:13,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:13,389 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,389 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:13,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-01 03:17:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:13,392 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,393 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:13,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-01 03:17:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:13,396 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,396 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:13,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-05-01 03:17:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:13,399 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,400 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:13,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-05-01 03:17:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:13,404 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,404 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:13,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-01 03:17:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:13,408 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,408 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-01 03:17:13,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-01 03:17:13,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439023768] [2021-05-01 03:17:13,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439023768] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 03:17:13,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 03:17:13,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-01 03:17:13,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177586625] [2021-05-01 03:17:13,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-01 03:17:13,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-01 03:17:13,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-01 03:17:13,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-01 03:17:13,411 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-01 03:17:13,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 03:17:13,704 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2021-05-01 03:17:13,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-01 03:17:13,704 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-01 03:17:13,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 03:17:13,705 INFO L225 Difference]: With dead ends: 73 [2021-05-01 03:17:13,706 INFO L226 Difference]: Without dead ends: 73 [2021-05-01 03:17:13,706 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-01 03:17:13,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-01 03:17:13,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2021-05-01 03:17:13,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-01 03:17:13,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2021-05-01 03:17:13,712 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 47 [2021-05-01 03:17:13,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 03:17:13,712 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2021-05-01 03:17:13,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-01 03:17:13,712 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2021-05-01 03:17:13,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-01 03:17:13,714 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 03:17:13,714 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 03:17:13,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-01 03:17:13,714 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 03:17:13,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 03:17:13,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1366093938, now seen corresponding path program 1 times [2021-05-01 03:17:13,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 03:17:13,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520240361] [2021-05-01 03:17:13,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 03:17:13,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:13,742 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,742 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:13,743 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,743 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 03:17:13,746 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,747 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 03:17:13,750 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,751 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 03:17:13,755 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,756 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 03:17:13,761 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,761 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 03:17:13,767 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,767 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:13,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 03:17:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:13,790 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,791 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:13,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-01 03:17:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:13,797 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,797 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:13,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-01 03:17:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:13,806 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,807 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:13,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-01 03:17:13,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:13,812 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,816 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:13,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-05-01 03:17:13,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:13,826 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,826 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:13,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-05-01 03:17:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:13,831 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,832 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:13,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-01 03:17:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:13,842 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,842 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:13,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-05-01 03:17:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:13,851 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,852 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:13,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-01 03:17:13,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:13,855 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:13,856 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-01 03:17:13,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-01 03:17:13,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520240361] [2021-05-01 03:17:13,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520240361] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 03:17:13,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 03:17:13,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-01 03:17:13,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769625619] [2021-05-01 03:17:13,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-01 03:17:13,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-01 03:17:13,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-01 03:17:13,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-01 03:17:13,858 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-01 03:17:14,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 03:17:14,170 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2021-05-01 03:17:14,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-01 03:17:14,171 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 57 [2021-05-01 03:17:14,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 03:17:14,172 INFO L225 Difference]: With dead ends: 73 [2021-05-01 03:17:14,172 INFO L226 Difference]: Without dead ends: 73 [2021-05-01 03:17:14,173 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 164.3ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-05-01 03:17:14,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-01 03:17:14,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-05-01 03:17:14,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 42 states have internal predecessors, (45), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-01 03:17:14,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2021-05-01 03:17:14,179 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 57 [2021-05-01 03:17:14,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 03:17:14,180 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2021-05-01 03:17:14,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-01 03:17:14,180 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2021-05-01 03:17:14,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-01 03:17:14,181 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 03:17:14,182 INFO L519 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 03:17:14,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-01 03:17:14,182 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 03:17:14,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 03:17:14,182 INFO L82 PathProgramCache]: Analyzing trace with hash -430516171, now seen corresponding path program 1 times [2021-05-01 03:17:14,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 03:17:14,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050852842] [2021-05-01 03:17:14,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 03:17:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:14,213 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:14,213 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:14,214 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:14,214 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 03:17:14,217 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:14,217 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 03:17:14,221 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:14,221 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 03:17:14,226 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:14,226 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 03:17:14,232 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:14,232 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 03:17:14,237 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:14,237 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 03:17:14,244 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:14,244 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:14,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 03:17:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:14,267 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:14,267 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:14,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-01 03:17:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:14,270 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:14,271 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:14,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-01 03:17:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:14,274 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:14,274 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:14,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-01 03:17:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:14,277 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:14,277 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:14,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-05-01 03:17:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:14,285 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:14,285 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:14,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-05-01 03:17:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:14,291 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:14,291 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:14,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-01 03:17:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:14,299 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:14,300 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:14,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-05-01 03:17:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:14,303 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:14,304 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:14,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-01 03:17:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:14,310 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:14,310 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:14,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-05-01 03:17:14,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:14,319 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:14,319 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:14,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-05-01 03:17:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:17:14,323 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:17:14,324 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:17:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-01 03:17:14,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-01 03:17:14,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050852842] [2021-05-01 03:17:14,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050852842] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 03:17:14,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 03:17:14,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-01 03:17:14,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873080955] [2021-05-01 03:17:14,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-01 03:17:14,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-01 03:17:14,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-01 03:17:14,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-01 03:17:14,327 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-01 03:17:14,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 03:17:14,672 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2021-05-01 03:17:14,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-01 03:17:14,672 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 68 [2021-05-01 03:17:14,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 03:17:14,673 INFO L225 Difference]: With dead ends: 71 [2021-05-01 03:17:14,673 INFO L226 Difference]: Without dead ends: 0 [2021-05-01 03:17:14,673 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 192.2ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-05-01 03:17:14,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-01 03:17:14,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-01 03:17:14,674 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) [2021-05-01 03:17:14,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-01 03:17:14,674 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 68 [2021-05-01 03:17:14,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 03:17:14,674 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-01 03:17:14,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-01 03:17:14,674 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-01 03:17:14,675 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-01 03:17:14,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-01 03:17:14,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 03:17:14 BasicIcfg [2021-05-01 03:17:14,678 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 03:17:14,679 INFO L168 Benchmark]: Toolchain (without parser) took 4670.70 ms. Allocated memory was 248.5 MB in the beginning and 312.5 MB in the end (delta: 64.0 MB). Free memory was 213.0 MB in the beginning and 171.8 MB in the end (delta: 41.2 MB). Peak memory consumption was 106.7 MB. Max. memory is 8.0 GB. [2021-05-01 03:17:14,679 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 248.5 MB. Free memory is still 229.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 03:17:14,679 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.68 ms. Allocated memory is still 248.5 MB. Free memory was 212.8 MB in the beginning and 230.5 MB in the end (delta: -17.6 MB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. [2021-05-01 03:17:14,680 INFO L168 Benchmark]: Boogie Preprocessor took 32.12 ms. Allocated memory is still 248.5 MB. Free memory was 230.5 MB in the beginning and 228.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-01 03:17:14,680 INFO L168 Benchmark]: RCFGBuilder took 292.55 ms. Allocated memory is still 248.5 MB. Free memory was 228.8 MB in the beginning and 211.3 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-01 03:17:14,680 INFO L168 Benchmark]: IcfgTransformer took 37.21 ms. Allocated memory is still 248.5 MB. Free memory was 211.3 MB in the beginning and 209.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-01 03:17:14,681 INFO L168 Benchmark]: TraceAbstraction took 4005.05 ms. Allocated memory was 248.5 MB in the beginning and 312.5 MB in the end (delta: 64.0 MB). Free memory was 209.2 MB in the beginning and 171.8 MB in the end (delta: 37.4 MB). Peak memory consumption was 102.2 MB. Max. memory is 8.0 GB. [2021-05-01 03:17:14,682 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 248.5 MB. Free memory is still 229.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 280.68 ms. Allocated memory is still 248.5 MB. Free memory was 212.8 MB in the beginning and 230.5 MB in the end (delta: -17.6 MB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.12 ms. Allocated memory is still 248.5 MB. Free memory was 230.5 MB in the beginning and 228.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 292.55 ms. Allocated memory is still 248.5 MB. Free memory was 228.8 MB in the beginning and 211.3 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 37.21 ms. Allocated memory is still 248.5 MB. Free memory was 211.3 MB in the beginning and 209.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4005.05 ms. Allocated memory was 248.5 MB in the beginning and 312.5 MB in the end (delta: 64.0 MB). Free memory was 209.2 MB in the beginning and 171.8 MB in the end (delta: 37.4 MB). Peak memory consumption was 102.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3935.7ms, OverallIterations: 8, TraceHistogramMax: 11, EmptinessCheckTime: 17.4ms, AutomataDifference: 2628.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 286 SDtfs, 247 SDslu, 491 SDs, 0 SdLazy, 1162 SolverSat, 485 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1265.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 169 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1155.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=7, InterpolantAutomatonStates: 63, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 76.2ms AutomataMinimizationTime, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 33.0ms SsaConstructionTime, 132.3ms SatisfiabilityAnalysisTime, 882.0ms InterpolantComputationTime, 272 NumberOfCodeBlocks, 272 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 264 ConstructedInterpolants, 0 QuantifiedInterpolants, 732 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 428/428 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...