/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:10:35,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:10:35,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:10:35,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 07:10:35,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 07:10:35,674 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 07:10:35,679 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 07:10:35,684 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 07:10:35,686 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 07:10:35,690 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 07:10:35,691 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 07:10:35,691 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 07:10:35,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:10:35,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:10:35,693 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:10:35,693 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:10:35,694 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:10:35,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:10:35,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:10:35,701 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:10:35,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:10:35,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:10:35,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:10:35,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:10:35,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:10:35,712 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:10:35,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:10:35,713 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:10:35,718 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:10:35,733 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:10:35,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:10:35,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:10:35,735 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:10:35,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:10:35,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:10:35,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:10:35,735 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:10:35,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:10:35,735 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:10:35,735 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:10:35,735 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:10:35,736 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:10:35,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:10:35,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:10:35,736 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:10:35,736 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:10:35,736 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:10:35,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:10:35,736 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:10:35,736 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:10:35,737 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:10:35,747 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:10:35,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:10:36,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:10:36,016 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:10:36,016 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:10:36,017 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:10:36,018 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound2.c [2021-05-06 07:10:36,094 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a1a93940/11f75694114f43b1b6f3c0b0384b1134/FLAG5824f151e [2021-05-06 07:10:36,424 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:10:36,424 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound2.c [2021-05-06 07:10:36,429 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a1a93940/11f75694114f43b1b6f3c0b0384b1134/FLAG5824f151e [2021-05-06 07:10:36,444 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a1a93940/11f75694114f43b1b6f3c0b0384b1134 [2021-05-06 07:10:36,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:10:36,448 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:10:36,450 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:10:36,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:10:36,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:10:36,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:10:36" (1/1) ... [2021-05-06 07:10:36,454 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2130dd98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:10:36, skipping insertion in model container [2021-05-06 07:10:36,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:10:36" (1/1) ... [2021-05-06 07:10:36,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:10:36,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:10:36,575 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound2.c[597,610] [2021-05-06 07:10:36,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:10:36,598 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:10:36,639 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound2.c[597,610] [2021-05-06 07:10:36,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:10:36,662 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:10:36,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:10:36 WrapperNode [2021-05-06 07:10:36,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:10:36,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:10:36,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:10:36,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:10:36,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:10:36" (1/1) ... [2021-05-06 07:10:36,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:10:36" (1/1) ... [2021-05-06 07:10:36,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:10:36" (1/1) ... [2021-05-06 07:10:36,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:10:36" (1/1) ... [2021-05-06 07:10:36,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:10:36" (1/1) ... [2021-05-06 07:10:36,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:10:36" (1/1) ... [2021-05-06 07:10:36,685 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:10:36" (1/1) ... [2021-05-06 07:10:36,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:10:36,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:10:36,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:10:36,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:10:36,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:10:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:10:36,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:10:36,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:10:36,738 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:10:36,739 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:10:36,739 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:10:36,739 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:10:36,739 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:10:36,739 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:10:36,739 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:10:36,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:10:36,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 07:10:36,739 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:10:36,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:10:36,739 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:10:36,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:10:36,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:10:36,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:10:36,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:10:36,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:10:36,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:10:36,950 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:10:36,951 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 07:10:36,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:10:36 BoogieIcfgContainer [2021-05-06 07:10:36,952 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:10:36,952 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:10:36,952 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:10:36,953 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:10:36,954 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:10:36" (1/1) ... [2021-05-06 07:10:36,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:10:36 BasicIcfg [2021-05-06 07:10:36,985 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:10:36,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:10:36,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:10:36,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:10:36,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:10:36" (1/4) ... [2021-05-06 07:10:36,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af30ca1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:10:36, skipping insertion in model container [2021-05-06 07:10:36,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:10:36" (2/4) ... [2021-05-06 07:10:36,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af30ca1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:10:36, skipping insertion in model container [2021-05-06 07:10:36,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:10:36" (3/4) ... [2021-05-06 07:10:36,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af30ca1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:10:36, skipping insertion in model container [2021-05-06 07:10:36,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:10:36" (4/4) ... [2021-05-06 07:10:36,990 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound2.cJordan [2021-05-06 07:10:37,010 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:10:37,013 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:10:37,023 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:10:37,050 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:10:37,051 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:10:37,051 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:10:37,051 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:10:37,051 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:10:37,051 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:10:37,051 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:10:37,051 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:10:37,076 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:10:37,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 07:10:37,081 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:10:37,081 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:10:37,081 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:10:37,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:10:37,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1563578423, now seen corresponding path program 1 times [2021-05-06 07:10:37,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:10:37,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511925878] [2021-05-06 07:10:37,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:10:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:10:37,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:10:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:10:37,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:10:37,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:10:37,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 07:10:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:10:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:10:37,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:10:37,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511925878] [2021-05-06 07:10:37,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511925878] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:10:37,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:10:37,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:10:37,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307315465] [2021-05-06 07:10:37,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:10:37,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:10:37,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:10:37,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:10:37,353 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:10:37,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:10:37,415 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-05-06 07:10:37,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:10:37,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 07:10:37,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:10:37,422 INFO L225 Difference]: With dead ends: 32 [2021-05-06 07:10:37,422 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 07:10:37,423 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:10:37,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 07:10:37,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 07:10:37,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:10:37,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-06 07:10:37,449 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2021-05-06 07:10:37,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:10:37,449 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-06 07:10:37,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:10:37,449 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-06 07:10:37,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 07:10:37,450 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:10:37,451 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:10:37,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:10:37,451 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:10:37,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:10:37,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1863481077, now seen corresponding path program 1 times [2021-05-06 07:10:37,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:10:37,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4007356] [2021-05-06 07:10:37,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:10:37,482 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:10:37,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374587905] [2021-05-06 07:10:37,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:10:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:10:37,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 07:10:37,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:10:37,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:10:37,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:10:37,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4007356] [2021-05-06 07:10:37,698 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:10:37,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374587905] [2021-05-06 07:10:37,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374587905] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:10:37,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:10:37,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 07:10:37,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335112363] [2021-05-06 07:10:37,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:10:37,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:10:37,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:10:37,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:10:37,701 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 07:10:37,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:10:37,783 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-05-06 07:10:37,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:10:37,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 07:10:37,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:10:37,784 INFO L225 Difference]: With dead ends: 37 [2021-05-06 07:10:37,784 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 07:10:37,785 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:10:37,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 07:10:37,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-06 07:10:37,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:10:37,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-06 07:10:37,789 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2021-05-06 07:10:37,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:10:37,789 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-06 07:10:37,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 07:10:37,790 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-06 07:10:37,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 07:10:37,790 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:10:37,790 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:10:38,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 07:10:38,005 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:10:38,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:10:38,006 INFO L82 PathProgramCache]: Analyzing trace with hash -646008129, now seen corresponding path program 1 times [2021-05-06 07:10:38,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:10:38,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139647753] [2021-05-06 07:10:38,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:10:38,027 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:10:38,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [997550400] [2021-05-06 07:10:38,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:10:38,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:10:38,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 07:10:38,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:10:38,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:38,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:38,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:38,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:38,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:38,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:38,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:38,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:10:38,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:10:38,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139647753] [2021-05-06 07:10:38,339 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:10:38,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997550400] [2021-05-06 07:10:38,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997550400] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:10:38,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:10:38,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 07:10:38,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992282198] [2021-05-06 07:10:38,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 07:10:38,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:10:38,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 07:10:38,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:10:38,341 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 07:10:38,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:10:38,449 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2021-05-06 07:10:38,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 07:10:38,449 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-06 07:10:38,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:10:38,450 INFO L225 Difference]: With dead ends: 48 [2021-05-06 07:10:38,450 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 07:10:38,450 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 133.4ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-06 07:10:38,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 07:10:38,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 07:10:38,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:10:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-05-06 07:10:38,454 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 32 [2021-05-06 07:10:38,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:10:38,454 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-05-06 07:10:38,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 07:10:38,454 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-05-06 07:10:38,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 07:10:38,455 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:10:38,455 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:10:38,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:10:38,672 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:10:38,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:10:38,672 INFO L82 PathProgramCache]: Analyzing trace with hash 241495552, now seen corresponding path program 1 times [2021-05-06 07:10:38,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:10:38,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835218690] [2021-05-06 07:10:38,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:10:38,686 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:10:38,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644237038] [2021-05-06 07:10:38,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:10:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:10:38,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 07:10:38,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:10:38,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:38,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:38,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:10:38,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:10:38,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835218690] [2021-05-06 07:10:38,849 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:10:38,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644237038] [2021-05-06 07:10:38,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644237038] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:10:38,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:10:38,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 07:10:38,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635652881] [2021-05-06 07:10:38,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:10:38,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:10:38,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:10:38,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:10:38,850 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:10:38,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:10:38,922 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-05-06 07:10:38,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:10:38,923 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2021-05-06 07:10:38,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:10:38,923 INFO L225 Difference]: With dead ends: 46 [2021-05-06 07:10:38,923 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 07:10:38,924 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:10:38,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 07:10:38,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2021-05-06 07:10:38,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:10:38,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-05-06 07:10:38,927 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 32 [2021-05-06 07:10:38,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:10:38,928 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-05-06 07:10:38,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:10:38,928 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-05-06 07:10:38,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 07:10:38,928 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:10:38,928 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:10:39,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:10:39,146 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:10:39,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:10:39,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1661983408, now seen corresponding path program 1 times [2021-05-06 07:10:39,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:10:39,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488385691] [2021-05-06 07:10:39,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:10:39,154 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:10:39,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688867930] [2021-05-06 07:10:39,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:10:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:10:39,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 07:10:39,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:10:39,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:39,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:39,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:39,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:39,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:39,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 07:10:39,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:10:39,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488385691] [2021-05-06 07:10:39,406 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:10:39,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688867930] [2021-05-06 07:10:39,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688867930] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:10:39,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:10:39,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 07:10:39,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431262037] [2021-05-06 07:10:39,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 07:10:39,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:10:39,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 07:10:39,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-06 07:10:39,408 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 14 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 07:10:39,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:10:39,574 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-05-06 07:10:39,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 07:10:39,574 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39 [2021-05-06 07:10:39,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:10:39,575 INFO L225 Difference]: With dead ends: 51 [2021-05-06 07:10:39,575 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 07:10:39,575 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 176.1ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-06 07:10:39,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 07:10:39,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2021-05-06 07:10:39,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:10:39,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-05-06 07:10:39,578 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 39 [2021-05-06 07:10:39,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:10:39,579 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-05-06 07:10:39,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 07:10:39,579 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-05-06 07:10:39,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 07:10:39,579 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:10:39,579 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:10:39,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:10:39,797 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:10:39,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:10:39,797 INFO L82 PathProgramCache]: Analyzing trace with hash 207688042, now seen corresponding path program 1 times [2021-05-06 07:10:39,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:10:39,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40731178] [2021-05-06 07:10:39,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:10:39,805 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:10:39,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030860652] [2021-05-06 07:10:39,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:10:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:10:39,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 07:10:39,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:10:39,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:39,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:39,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:39,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:10:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-06 07:10:40,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:10:40,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40731178] [2021-05-06 07:10:40,613 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:10:40,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030860652] [2021-05-06 07:10:40,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030860652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:10:40,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:10:40,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 07:10:40,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353746833] [2021-05-06 07:10:40,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 07:10:40,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:10:40,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 07:10:40,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-06 07:10:40,614 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 17 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 07:10:41,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:10:41,056 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2021-05-06 07:10:41,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 07:10:41,056 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-06 07:10:41,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:10:41,057 INFO L225 Difference]: With dead ends: 51 [2021-05-06 07:10:41,057 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 07:10:41,057 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 480.4ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-05-06 07:10:41,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 07:10:41,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 07:10:41,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 07:10:41,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 07:10:41,057 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2021-05-06 07:10:41,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:10:41,058 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 07:10:41,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 07:10:41,058 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 07:10:41,058 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 07:10:41,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:10:41,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:10:41 BasicIcfg [2021-05-06 07:10:41,262 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 07:10:41,262 INFO L168 Benchmark]: Toolchain (without parser) took 4814.20 ms. Allocated memory was 176.2 MB in the beginning and 211.8 MB in the end (delta: 35.7 MB). Free memory was 141.4 MB in the beginning and 82.9 MB in the end (delta: 58.6 MB). Peak memory consumption was 94.7 MB. Max. memory is 8.0 GB. [2021-05-06 07:10:41,262 INFO L168 Benchmark]: CDTParser took 0.66 ms. Allocated memory is still 176.2 MB. Free memory was 158.0 MB in the beginning and 157.9 MB in the end (delta: 105.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 07:10:41,262 INFO L168 Benchmark]: CACSL2BoogieTranslator took 212.49 ms. Allocated memory is still 176.2 MB. Free memory was 141.2 MB in the beginning and 159.4 MB in the end (delta: -18.2 MB). Peak memory consumption was 12.9 MB. Max. memory is 8.0 GB. [2021-05-06 07:10:41,263 INFO L168 Benchmark]: Boogie Preprocessor took 23.48 ms. Allocated memory is still 176.2 MB. Free memory was 159.4 MB in the beginning and 157.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 07:10:41,263 INFO L168 Benchmark]: RCFGBuilder took 264.69 ms. Allocated memory is still 176.2 MB. Free memory was 157.7 MB in the beginning and 142.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 07:10:41,263 INFO L168 Benchmark]: IcfgTransformer took 33.29 ms. Allocated memory is still 176.2 MB. Free memory was 142.0 MB in the beginning and 140.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:10:41,263 INFO L168 Benchmark]: TraceAbstraction took 4275.41 ms. Allocated memory was 176.2 MB in the beginning and 211.8 MB in the end (delta: 35.7 MB). Free memory was 140.3 MB in the beginning and 82.9 MB in the end (delta: 57.4 MB). Peak memory consumption was 93.3 MB. Max. memory is 8.0 GB. [2021-05-06 07:10:41,263 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.66 ms. Allocated memory is still 176.2 MB. Free memory was 158.0 MB in the beginning and 157.9 MB in the end (delta: 105.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 212.49 ms. Allocated memory is still 176.2 MB. Free memory was 141.2 MB in the beginning and 159.4 MB in the end (delta: -18.2 MB). Peak memory consumption was 12.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.48 ms. Allocated memory is still 176.2 MB. Free memory was 159.4 MB in the beginning and 157.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 264.69 ms. Allocated memory is still 176.2 MB. Free memory was 157.7 MB in the beginning and 142.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 33.29 ms. Allocated memory is still 176.2 MB. Free memory was 142.0 MB in the beginning and 140.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4275.41 ms. Allocated memory was 176.2 MB in the beginning and 211.8 MB in the end (delta: 35.7 MB). Free memory was 140.3 MB in the beginning and 82.9 MB in the end (delta: 57.4 MB). Peak memory consumption was 93.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4209.7ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 10.6ms, AutomataDifference: 966.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 22.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 141 SDtfs, 125 SDslu, 646 SDs, 0 SdLazy, 811 SolverSat, 54 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 443.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 191 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 940.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=5, InterpolantAutomatonStates: 60, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 30.8ms AutomataMinimizationTime, 6 MinimizatonAttempts, 7 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 50.8ms SsaConstructionTime, 154.9ms SatisfiabilityAnalysisTime, 1567.5ms InterpolantComputationTime, 190 NumberOfCodeBlocks, 190 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 184 ConstructedInterpolants, 0 QuantifiedInterpolants, 1226 SizeOfPredicates, 24 NumberOfNonLiveVariables, 705 ConjunctsInSsa, 119 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 40/60 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...