/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/geo1-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:49:29,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:49:29,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:49:29,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:49:29,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:49:29,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:49:29,350 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:49:29,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:49:29,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:49:29,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:49:29,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:49:29,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:49:29,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:49:29,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:49:29,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:49:29,371 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:49:29,373 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:49:29,374 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:49:29,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:49:29,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:49:29,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:49:29,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:49:29,393 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:49:29,394 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:49:29,396 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:49:29,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:49:29,401 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:49:29,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:49:29,407 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:49:29,418 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:49:29,418 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:49:29,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:49:29,420 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:49:29,420 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:49:29,420 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:49:29,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:49:29,420 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:49:29,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:49:29,421 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:49:29,421 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:49:29,421 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:49:29,421 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:49:29,422 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:49:29,422 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:49:29,422 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:49:29,422 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:49:29,422 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:49:29,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:49:29,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:49:29,422 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:49:29,423 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:49:29,423 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:49:29,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:49:29,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:49:29,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:49:29,655 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:49:29,656 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:49:29,656 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_unwindbound2.c [2021-05-02 20:49:29,701 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/015e3ebd3/a13d171cc3294af69291738705a80241/FLAG961ba252c [2021-05-02 20:49:30,042 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:49:30,042 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_unwindbound2.c [2021-05-02 20:49:30,046 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/015e3ebd3/a13d171cc3294af69291738705a80241/FLAG961ba252c [2021-05-02 20:49:30,059 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/015e3ebd3/a13d171cc3294af69291738705a80241 [2021-05-02 20:49:30,061 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:49:30,062 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:49:30,065 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:49:30,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:49:30,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:49:30,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:49:30" (1/1) ... [2021-05-02 20:49:30,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e68b43b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:49:30, skipping insertion in model container [2021-05-02 20:49:30,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:49:30" (1/1) ... [2021-05-02 20:49:30,076 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:49:30,087 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:49:30,161 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/geo1-ll_unwindbound2.c[546,559] [2021-05-02 20:49:30,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:49:30,173 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:49:30,204 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/geo1-ll_unwindbound2.c[546,559] [2021-05-02 20:49:30,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:49:30,229 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:49:30,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:49:30 WrapperNode [2021-05-02 20:49:30,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:49:30,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:49:30,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:49:30,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:49:30,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:49:30" (1/1) ... [2021-05-02 20:49:30,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:49:30" (1/1) ... [2021-05-02 20:49:30,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:49:30" (1/1) ... [2021-05-02 20:49:30,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:49:30" (1/1) ... [2021-05-02 20:49:30,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:49:30" (1/1) ... [2021-05-02 20:49:30,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:49:30" (1/1) ... [2021-05-02 20:49:30,265 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:49:30" (1/1) ... [2021-05-02 20:49:30,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:49:30,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:49:30,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:49:30,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:49:30,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:49:30" (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 [2021-05-02 20:49:30,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:49:30,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:49:30,319 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:49:30,319 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:49:30,319 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:49:30,319 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:49:30,319 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:49:30,319 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:49:30,319 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:49:30,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:49:30,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:49:30,320 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:49:30,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:49:30,320 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:49:30,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:49:30,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:49:30,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:49:30,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:49:30,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:49:30,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:49:30,517 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:49:30,518 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:49:30,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:49:30 BoogieIcfgContainer [2021-05-02 20:49:30,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:49:30,519 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:49:30,519 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:49:30,520 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:49:30,521 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:49:30" (1/1) ... [2021-05-02 20:49:30,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:49:30 BasicIcfg [2021-05-02 20:49:30,555 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:49:30,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:49:30,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:49:30,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:49:30,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:49:30" (1/4) ... [2021-05-02 20:49:30,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7197ad80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:49:30, skipping insertion in model container [2021-05-02 20:49:30,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:49:30" (2/4) ... [2021-05-02 20:49:30,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7197ad80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:49:30, skipping insertion in model container [2021-05-02 20:49:30,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:49:30" (3/4) ... [2021-05-02 20:49:30,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7197ad80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:49:30, skipping insertion in model container [2021-05-02 20:49:30,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:49:30" (4/4) ... [2021-05-02 20:49:30,559 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-ll_unwindbound2.cJordan [2021-05-02 20:49:30,562 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:49:30,566 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:49:30,577 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:49:30,596 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:49:30,596 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:49:30,596 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:49:30,596 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:49:30,597 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:49:30,597 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:49:30,597 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:49:30,597 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:49:30,608 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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) [2021-05-02 20:49:30,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:49:30,614 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:49:30,614 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] [2021-05-02 20:49:30,614 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:49:30,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:49:30,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1175629711, now seen corresponding path program 1 times [2021-05-02 20:49:30,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:49:30,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758366415] [2021-05-02 20:49:30,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:49:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:49:30,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:49:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:49:30,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:49:30,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:49:30,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 20:49:30,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:49:30,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:49:30,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:49:30,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758366415] [2021-05-02 20:49:30,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758366415] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:49:30,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:49:30,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:49:30,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311063250] [2021-05-02 20:49:30,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:49:30,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:49:30,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:49:30,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:49:30,870 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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) [2021-05-02 20:49:30,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:49:30,954 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-05-02 20:49:30,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:49:30,955 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 [2021-05-02 20:49:30,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:49:30,960 INFO L225 Difference]: With dead ends: 31 [2021-05-02 20:49:30,960 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 20:49:30,961 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:49:30,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 20:49:30,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 20:49:30,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 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) [2021-05-02 20:49:30,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-02 20:49:30,981 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 23 [2021-05-02 20:49:30,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:49:30,981 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-02 20:49:30,981 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) [2021-05-02 20:49:30,981 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-02 20:49:30,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:49:30,985 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:49:30,985 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] [2021-05-02 20:49:30,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:49:30,986 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:49:30,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:49:30,987 INFO L82 PathProgramCache]: Analyzing trace with hash 165914577, now seen corresponding path program 1 times [2021-05-02 20:49:30,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:49:30,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057595810] [2021-05-02 20:49:30,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:49:31,013 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:49:31,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869138716] [2021-05-02 20:49:31,013 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 [2021-05-02 20:49:31,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:49:31,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:49:31,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:49:31,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:31,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:31,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:31,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:49:31,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:49:31,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057595810] [2021-05-02 20:49:31,298 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:49:31,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869138716] [2021-05-02 20:49:31,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869138716] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:49:31,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:49:31,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:49:31,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209049285] [2021-05-02 20:49:31,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:49:31,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:49:31,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:49:31,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:49:31,300 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:49:31,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:49:31,386 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-05-02 20:49:31,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:49:31,388 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 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 [2021-05-02 20:49:31,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:49:31,389 INFO L225 Difference]: With dead ends: 34 [2021-05-02 20:49:31,389 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 20:49:31,389 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:49:31,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 20:49:31,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-02 20:49:31,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:49:31,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-02 20:49:31,396 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-02 20:49:31,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:49:31,398 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-02 20:49:31,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:49:31,401 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-02 20:49:31,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 20:49:31,401 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:49:31,401 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, 1] [2021-05-02 20:49:31,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:49:31,602 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:49:31,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:49:31,603 INFO L82 PathProgramCache]: Analyzing trace with hash 815968169, now seen corresponding path program 1 times [2021-05-02 20:49:31,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:49:31,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870684073] [2021-05-02 20:49:31,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:49:31,611 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:49:31,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1057217059] [2021-05-02 20:49:31,611 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 [2021-05-02 20:49:31,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:49:31,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:49:31,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:49:31,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:31,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:31,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:31,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:31,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:49:31,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:49:31,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870684073] [2021-05-02 20:49:31,796 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:49:31,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057217059] [2021-05-02 20:49:31,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057217059] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:49:31,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:49:31,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:49:31,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277104060] [2021-05-02 20:49:31,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:49:31,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:49:31,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:49:31,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:49:31,798 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:49:31,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:49:31,812 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-05-02 20:49:31,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:49:31,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-02 20:49:31,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:49:31,815 INFO L225 Difference]: With dead ends: 32 [2021-05-02 20:49:31,815 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 20:49:31,816 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:49:31,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 20:49:31,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 20:49:31,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:49:31,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-02 20:49:31,824 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2021-05-02 20:49:31,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:49:31,824 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-02 20:49:31,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:49:31,824 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-02 20:49:31,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 20:49:31,825 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:49:31,825 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:49:32,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:49:32,043 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:49:32,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:49:32,043 INFO L82 PathProgramCache]: Analyzing trace with hash -974402257, now seen corresponding path program 1 times [2021-05-02 20:49:32,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:49:32,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833848566] [2021-05-02 20:49:32,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:49:32,051 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:49:32,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1917301768] [2021-05-02 20:49:32,051 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 [2021-05-02 20:49:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:49:32,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:49:32,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:49:32,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:32,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:32,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:32,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:32,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:32,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:32,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:32,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:32,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:32,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:32,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:32,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:32,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:32,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:32,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:32,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:32,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:49:32,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:49:32,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833848566] [2021-05-02 20:49:32,342 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:49:32,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917301768] [2021-05-02 20:49:32,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917301768] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:49:32,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:49:32,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:49:32,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206368518] [2021-05-02 20:49:32,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:49:32,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:49:32,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:49:32,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:49:32,343 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:49:34,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:49:34,488 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-05-02 20:49:34,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:49:34,489 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-02 20:49:34,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:49:34,490 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:49:34,490 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 20:49:34,490 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:49:34,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 20:49:34,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 20:49:34,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:49:34,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-05-02 20:49:34,493 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 30 [2021-05-02 20:49:34,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:49:34,493 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-05-02 20:49:34,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:49:34,493 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-05-02 20:49:34,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 20:49:34,493 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:49:34,494 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:49:34,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:49:34,717 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:49:34,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:49:34,717 INFO L82 PathProgramCache]: Analyzing trace with hash 687559567, now seen corresponding path program 1 times [2021-05-02 20:49:34,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:49:34,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864289032] [2021-05-02 20:49:34,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:49:34,725 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:49:34,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293139649] [2021-05-02 20:49:34,725 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 [2021-05-02 20:49:34,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:49:34,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:49:34,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:49:34,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:34,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:34,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:34,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:34,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:34,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:34,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:34,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:34,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:49:34,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:49:34,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864289032] [2021-05-02 20:49:34,921 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:49:34,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293139649] [2021-05-02 20:49:34,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293139649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:49:34,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:49:34,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:49:34,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990497178] [2021-05-02 20:49:34,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:49:34,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:49:34,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:49:34,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:49:34,922 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:49:35,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:49:35,003 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-05-02 20:49:35,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:49:35,003 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2021-05-02 20:49:35,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:49:35,005 INFO L225 Difference]: With dead ends: 42 [2021-05-02 20:49:35,005 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 20:49:35,007 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:49:35,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 20:49:35,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-05-02 20:49:35,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 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) [2021-05-02 20:49:35,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-05-02 20:49:35,017 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 31 [2021-05-02 20:49:35,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:49:35,017 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-05-02 20:49:35,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:49:35,018 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-05-02 20:49:35,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 20:49:35,019 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:49:35,019 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:49:35,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:49:35,225 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:49:35,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:49:35,225 INFO L82 PathProgramCache]: Analyzing trace with hash -192906325, now seen corresponding path program 1 times [2021-05-02 20:49:35,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:49:35,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056601498] [2021-05-02 20:49:35,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:49:35,232 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:49:35,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341581480] [2021-05-02 20:49:35,233 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 [2021-05-02 20:49:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:49:35,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:49:35,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:49:35,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:49:35,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:49:35,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056601498] [2021-05-02 20:49:35,351 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:49:35,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341581480] [2021-05-02 20:49:35,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341581480] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:49:35,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:49:35,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:49:35,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2635850] [2021-05-02 20:49:35,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:49:35,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:49:35,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:49:35,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:49:35,352 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:49:35,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:49:35,378 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-05-02 20:49:35,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:49:35,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 20:49:35,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:49:35,378 INFO L225 Difference]: With dead ends: 40 [2021-05-02 20:49:35,379 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 20:49:35,379 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:49:35,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 20:49:35,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-02 20:49:35,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 28 states have internal predecessors, (28), 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) [2021-05-02 20:49:35,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-02 20:49:35,381 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 32 [2021-05-02 20:49:35,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:49:35,381 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-02 20:49:35,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:49:35,381 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-02 20:49:35,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:49:35,382 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:49:35,382 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:49:35,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:49:35,589 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:49:35,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:49:35,589 INFO L82 PathProgramCache]: Analyzing trace with hash 33710413, now seen corresponding path program 2 times [2021-05-02 20:49:35,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:49:35,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151422924] [2021-05-02 20:49:35,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:49:35,596 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:49:35,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [762702332] [2021-05-02 20:49:35,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:49:35,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:49:35,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:49:35,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:49:35,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:49:35,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:49:35,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:49:35,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151422924] [2021-05-02 20:49:35,734 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:49:35,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762702332] [2021-05-02 20:49:35,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762702332] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:49:35,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:49:35,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:49:35,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087072713] [2021-05-02 20:49:35,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:49:35,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:49:35,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:49:35,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:49:35,735 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:49:35,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:49:35,772 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-05-02 20:49:35,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:49:35,773 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 39 [2021-05-02 20:49:35,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:49:35,773 INFO L225 Difference]: With dead ends: 39 [2021-05-02 20:49:35,773 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 20:49:35,774 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:49:35,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 20:49:35,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 20:49:35,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.0) internal successors, (25), 25 states have internal predecessors, (25), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:49:35,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-05-02 20:49:35,776 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 39 [2021-05-02 20:49:35,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:49:35,776 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-05-02 20:49:35,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:49:35,776 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-05-02 20:49:35,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 20:49:35,777 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:49:35,777 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:49:35,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:49:35,996 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:49:35,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:49:35,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1012606381, now seen corresponding path program 2 times [2021-05-02 20:49:35,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:49:35,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888908744] [2021-05-02 20:49:35,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:49:36,003 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:49:36,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1521659533] [2021-05-02 20:49:36,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:49:36,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:49:36,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:49:36,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 20:49:36,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:49:36,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:36,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:36,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:36,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:36,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:36,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:36,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:36,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:36,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:36,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:42,219 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 18 [2021-05-02 20:49:42,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:42,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:42,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:42,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:42,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:42,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:42,316 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 20:49:42,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:49:42,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888908744] [2021-05-02 20:49:42,316 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:49:42,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521659533] [2021-05-02 20:49:42,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521659533] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:49:42,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:49:42,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:49:42,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652803821] [2021-05-02 20:49:42,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:49:42,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:49:42,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:49:42,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=151, Unknown=1, NotChecked=0, Total=182 [2021-05-02 20:49:42,317 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:49:56,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:49:56,593 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-05-02 20:49:56,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:49:56,594 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2021-05-02 20:49:56,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:49:56,594 INFO L225 Difference]: With dead ends: 35 [2021-05-02 20:49:56,594 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:49:56,594 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 8234.0ms TimeCoverageRelationStatistics Valid=53, Invalid=287, Unknown=2, NotChecked=0, Total=342 [2021-05-02 20:49:56,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:49:56,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:49:56,595 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) [2021-05-02 20:49:56,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:49:56,595 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 40 [2021-05-02 20:49:56,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:49:56,595 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:49:56,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:49:56,595 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:49:56,595 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:49:56,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:49:56,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:49:56 BasicIcfg [2021-05-02 20:49:56,799 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:49:56,799 INFO L168 Benchmark]: Toolchain (without parser) took 26737.04 ms. Allocated memory was 190.8 MB in the beginning and 234.9 MB in the end (delta: 44.0 MB). Free memory was 155.8 MB in the beginning and 84.8 MB in the end (delta: 71.0 MB). Peak memory consumption was 116.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:49:56,799 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 190.8 MB. Free memory is still 172.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:49:56,800 INFO L168 Benchmark]: CACSL2BoogieTranslator took 164.99 ms. Allocated memory is still 190.8 MB. Free memory was 155.6 MB in the beginning and 173.4 MB in the end (delta: -17.8 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:49:56,800 INFO L168 Benchmark]: Boogie Preprocessor took 34.42 ms. Allocated memory is still 190.8 MB. Free memory was 173.4 MB in the beginning and 171.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:49:56,800 INFO L168 Benchmark]: RCFGBuilder took 252.36 ms. Allocated memory is still 190.8 MB. Free memory was 171.9 MB in the beginning and 157.2 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:49:56,800 INFO L168 Benchmark]: IcfgTransformer took 35.61 ms. Allocated memory is still 190.8 MB. Free memory was 157.2 MB in the beginning and 156.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:49:56,800 INFO L168 Benchmark]: TraceAbstraction took 26243.46 ms. Allocated memory was 190.8 MB in the beginning and 234.9 MB in the end (delta: 44.0 MB). Free memory was 155.6 MB in the beginning and 84.8 MB in the end (delta: 70.8 MB). Peak memory consumption was 116.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:49:56,800 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 190.8 MB. Free memory is still 172.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 164.99 ms. Allocated memory is still 190.8 MB. Free memory was 155.6 MB in the beginning and 173.4 MB in the end (delta: -17.8 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.42 ms. Allocated memory is still 190.8 MB. Free memory was 173.4 MB in the beginning and 171.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 252.36 ms. Allocated memory is still 190.8 MB. Free memory was 171.9 MB in the beginning and 157.2 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 35.61 ms. Allocated memory is still 190.8 MB. Free memory was 157.2 MB in the beginning and 156.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 26243.46 ms. Allocated memory was 190.8 MB in the beginning and 234.9 MB in the end (delta: 44.0 MB). Free memory was 155.6 MB in the beginning and 84.8 MB in the end (delta: 70.8 MB). Peak memory consumption was 116.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: 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, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 26201.7ms, OverallIterations: 8, TraceHistogramMax: 3, EmptinessCheckTime: 17.9ms, AutomataDifference: 16784.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 195 SDtfs, 99 SDslu, 656 SDs, 0 SdLazy, 409 SolverSat, 39 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 14358.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 238 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 8562.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=5, InterpolantAutomatonStates: 61, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 43.3ms AutomataMinimizationTime, 8 MinimizatonAttempts, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 88.3ms SsaConstructionTime, 174.8ms SatisfiabilityAnalysisTime, 7225.2ms InterpolantComputationTime, 242 NumberOfCodeBlocks, 242 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 234 ConstructedInterpolants, 2 QuantifiedInterpolants, 826 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1033 ConjunctsInSsa, 112 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 54/77 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...